7jun - Revision history

OCA at 14:53, 6 March 2024

2024-03-06T14:53:56Z

←Older revision		Revision as of 14:53, 6 March 2024
Line 3:		Line 3:
	<StructureSection load='7jun' size='340' side='right'caption='[[7jun]], [[Resolution\|resolution]] 2.30Å' scene=''>		<StructureSection load='7jun' size='340' side='right'caption='[[7jun]], [[Resolution\|resolution]] 2.30Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[7jun]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/~~2019-ncov 2019-ncov~~]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[7jun]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome_coronavirus_2 Severe acute respiratory syndrome coronavirus 2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>
-	</td></tr><tr id='~~ligand~~'><td class="sblockLbl"><b>[[~~Ligand~~\|~~Ligands~~:]]</b></td><td class="sblockDat" id="~~ligandDat~~">~~<scene name='pdbligand=DOD:DEUTERATED+WATER'>DOD</scene>~~</td></tr>	+	</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models\|Method:]]</b></td><td class="sblockDat" id="methodDat">Hybrid , Neutron Diffraction , X-ray diffraction, [[Resolution\|Resolution]] 2.3Å</td></tr>
-	<tr id='~~gene~~'><td class="sblockLbl"><b>[[~~Gene~~\|~~Gene~~:]]</b></td><td class="sblockDat"~~>rep, 1a-1b ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&~~id=~~2697049 2019-nCoV])</td~~><~~/tr>~~	+	<tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DOD:DEUTERATED+WATER'>DOD</scene></td></tr>
-	~~<tr id~~='~~activity'><td class~~=~~"sblockLbl"><b>Activity~~:~~</b></td><td class="sblockDat"><span class='plainlinks~~'>~~[https://en.wikipedia.org/wiki/SARS_coronavirus_main_proteinase SARS coronavirus main proteinase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.69 3.4.22.69]~~ </~~span~~></td></tr>	+
	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [https://pdbe.org/7jun PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [https://www.ebi.ac.uk/pdbsum/7jun PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>		<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [https://pdbe.org/7jun PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [https://www.ebi.ac.uk/pdbsum/7jun PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
-	[[https://www.uniprot.org/uniprot/R1AB_SARS2 R1AB_SARS2]] Multifunctional protein involved in the transcription and replication of viral RNAs. Contains the proteinases responsible for the cleavages of the polyprotein.[UniProtKB:P0C6X7] Inhibits host translation by interacting with the 40S ribosomal subunit. The nsp1-40S ribosome complex further induces an endonucleolytic cleavage near the 5'UTR of host mRNAs, targeting them for degradation. Viral mRNAs are not susceptible to nsp1-mediated endonucleolytic RNA cleavage thanks to the presence of a 5'-end leader sequence and are therefore protected from degradation. By suppressing host gene expression, nsp1 facilitates efficient viral gene expression in infected cells and evasion from host immune response.[UniProtKB:P0C6X7] May play a role in the modulation of host cell survival signaling pathway by interacting with host PHB and PHB2. Indeed, these two proteins play a role in maintaining the functional integrity of the mitochondria and protecting cells from various stresses.[UniProtKB:P0C6X7] Responsible for the cleavages located at the N-terminus of the replicase polyprotein. In addition, PL-PRO possesses a deubiquitinating/deISGylating activity and processes both 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains from cellular substrates. Participates together with nsp4 in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication. Antagonizes innate immune induction of type I interferon by blocking the phosphorylation, dimerization and subsequent nuclear translocation of host IRF3. Prevents also host NF-kappa-B signaling.[UniProtKB:P0C6X7] Participates in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication.[UniProtKB:P0C6X7] Cleaves the C-terminus of replicase polyprotein at 11 sites. Recognizes substrates containing the core sequence [ILMVF]-Q-\|-[SGACN] (PubMed:32198291). Also able to bind an ADP-ribose-1''-phosphate (ADRP).[UniProtKB:P0C6X7]<ref>PMID:32198291</ref> Plays a role in the initial induction of autophagosomes from host reticulum endoplasmic. Later, limits the expansion of these phagosomes that are no longer able to deliver viral components to lysosomes.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp8 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp7 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] May participate in viral replication by acting as a ssRNA-binding protein.[UniProtKB:P0C6X7] Plays a pivotal role in viral transcription by stimulating both nsp14 3'-5' exoribonuclease and nsp16 2'-O-methyltransferase activities. Therefore plays an essential role in viral mRNAs cap methylation.[UniProtKB:P0C6X7] Responsible for replication and transcription of the viral RNA genome.[UniProtKB:P0C6X7] Multi-functional protein with a zinc-binding domain in N-terminus displaying RNA and DNA duplex-unwinding activities with 5' to 3' polarity. Activity of helicase is dependent on magnesium.[UniProtKB:P0C6X7] Enzyme possessing two different activities: an exoribonuclease activity acting on both ssRNA and dsRNA in a 3' to 5' direction and a N7-guanine methyltransferase activity. Acts as a proofreading exoribonuclease for RNA replication, thereby lowering The sensitivity of the virus to RNA mutagens.[UniProtKB:P0C6X7] Mn(2+)-dependent, uridylate-specific enzyme, which leaves 2'-3'-cyclic phosphates 5' to the cleaved bond.[UniProtKB:P0C6X7] Methyltransferase that mediates mRNA cap 2'-O-ribose methylation to the 5'-cap structure of viral mRNAs. N7-methyl guanosine cap is a prerequisite for binding of nsp16. Therefore plays an essential role in viral mRNAs cap methylation which is essential to evade immune system.[UniProtKB:P0C6X7]	+	[https://www.uniprot.org/uniprot/R1AB_SARS2 R1AB_SARS2] Multifunctional protein involved in the transcription and replication of viral RNAs. Contains the proteinases responsible for the cleavages of the polyprotein.[UniProtKB:P0C6X7] Inhibits host translation by interacting with the 40S ribosomal subunit. The nsp1-40S ribosome complex further induces an endonucleolytic cleavage near the 5'UTR of host mRNAs, targeting them for degradation. Viral mRNAs are not susceptible to nsp1-mediated endonucleolytic RNA cleavage thanks to the presence of a 5'-end leader sequence and are therefore protected from degradation. By suppressing host gene expression, nsp1 facilitates efficient viral gene expression in infected cells and evasion from host immune response.[UniProtKB:P0C6X7] May play a role in the modulation of host cell survival signaling pathway by interacting with host PHB and PHB2. Indeed, these two proteins play a role in maintaining the functional integrity of the mitochondria and protecting cells from various stresses.[UniProtKB:P0C6X7] Responsible for the cleavages located at the N-terminus of the replicase polyprotein. In addition, PL-PRO possesses a deubiquitinating/deISGylating activity and processes both 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains from cellular substrates. Participates together with nsp4 in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication. Antagonizes innate immune induction of type I interferon by blocking the phosphorylation, dimerization and subsequent nuclear translocation of host IRF3. Prevents also host NF-kappa-B signaling.[UniProtKB:P0C6X7] Participates in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication.[UniProtKB:P0C6X7] Cleaves the C-terminus of replicase polyprotein at 11 sites. Recognizes substrates containing the core sequence [ILMVF]-Q-\|-[SGACN] (PubMed:32198291). Also able to bind an ADP-ribose-1''-phosphate (ADRP).[UniProtKB:P0C6X7]<ref>PMID:32198291</ref> Plays a role in the initial induction of autophagosomes from host reticulum endoplasmic. Later, limits the expansion of these phagosomes that are no longer able to deliver viral components to lysosomes.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp8 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp7 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] May participate in viral replication by acting as a ssRNA-binding protein.[UniProtKB:P0C6X7] Plays a pivotal role in viral transcription by stimulating both nsp14 3'-5' exoribonuclease and nsp16 2'-O-methyltransferase activities. Therefore plays an essential role in viral mRNAs cap methylation.[UniProtKB:P0C6X7] Responsible for replication and transcription of the viral RNA genome.[UniProtKB:P0C6X7] Multi-functional protein with a zinc-binding domain in N-terminus displaying RNA and DNA duplex-unwinding activities with 5' to 3' polarity. Activity of helicase is dependent on magnesium.[UniProtKB:P0C6X7] Enzyme possessing two different activities: an exoribonuclease activity acting on both ssRNA and dsRNA in a 3' to 5' direction and a N7-guanine methyltransferase activity. Acts as a proofreading exoribonuclease for RNA replication, thereby lowering The sensitivity of the virus to RNA mutagens.[UniProtKB:P0C6X7] Mn(2+)-dependent, uridylate-specific enzyme, which leaves 2'-3'-cyclic phosphates 5' to the cleaved bond.[UniProtKB:P0C6X7] Methyltransferase that mediates mRNA cap 2'-O-ribose methylation to the 5'-cap structure of viral mRNAs. N7-methyl guanosine cap is a prerequisite for binding of nsp16. Therefore plays an essential role in viral mRNAs cap methylation which is essential to evade immune system.[UniProtKB:P0C6X7]
-	~~<div style="background-color:#fffaf0;">~~	+
-	~~== Publication Abstract from PubMed ==~~	+
-	The main protease (3CL M(pro)) from SARS-CoV-2, the etiological agent of COVID-19, is an essential enzyme for viral replication. 3CL M(pro) possesses an unusual catalytic dyad composed of Cys145 and His41 residues. A critical question in the field has been what the protonation states of the ionizable residues in the substrate-binding active site cavity are; resolving this point would help understand the catalytic details of the enzyme and inform rational drug development against this pernicious virus. Here, we present the room-temperature neutron structure of 3CL M(pro), which allowed direct determination of hydrogen atom positions and, hence, protonation states in the protease. We observe that the catalytic site natively adopts a zwitterionic reactive form where Cys145 is in the negatively charged thiolate state, and His41 is doubly protonated and positively charged, instead of the neutral unreactive state usually envisaged. The neutron structure also identified the protonation states, and thus electrical charges, of all other amino acid residues and revealed intricate hydrogen bonding networks in the active site cavity and at the dimer interface. The fine atomic details present in this structure were made possible by the unique scattering properties of the neutron, which is an ideal probe for locating hydrogen positions and experimentally determining protonation states at near-physiological temperature. Our observations provide critical information for structure-assisted and computational drug design, allowing precise tailoring of inhibitors to the enzyme's electrostatic environment.	+
-		+
-	Unusual zwitterionic catalytic site of SARS-CoV-2 main protease revealed by neutron crystallography.,Kneller DW, Phillips G, Weiss KL, Pant S, Zhang Q, O'Neill HM, Coates L, Kovalevsky A J Biol Chem. 2020 Oct 15. pii: AC120.016154. doi: 10.1074/jbc.AC120.016154. PMID:33060199<ref>PMID:33060199</ref>	+
-		+
-	~~From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>~~	+
-	~~</div>~~	+
-	~~<div class="pdbe-citations 7jun" style="background-color:#fffaf0;"></div>~~	+

	==See Also==		==See Also==
Line 27:		Line 17:
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
-	[[Category: 2019-ncov]]
	[[Category: Large Structures]]		[[Category: Large Structures]]
-	[[Category: ~~SARS~~ coronavirus ~~main proteinase~~]]	+	[[Category: Severe acute respiratory syndrome coronavirus 2]]
-	[[Category: Coates, L]]	+	[[Category: Coates L]]
-	[[Category: Kneller~~, D W~~]]	+	[[Category: Kneller DW]]
-	[[Category: Kovalevsky, A]]	+	[[Category: Kovalevsky A]]
-	~~[[Category: 3cl mpro]]~~	+
-	~~[[Category: Drug design]]~~	+
-	~~[[Category: Enzyme mechanism]]~~	+
-	~~[[Category: Hydrogen bond]]~~	+
-	~~[[Category: Hydrolase]]~~	+
-	~~[[Category: Main protease]]~~	+
-	~~[[Category: Neutron crystallography]]~~	+
-	~~[[Category: Protonation state]]~~	+
-	~~[[Category: Room temperature]]~~	+
-	~~[[Category: Sars-cov-2~~]]	+

OCA at 08:33, 21 April 2021

2021-04-21T08:33:52Z

←Older revision		Revision as of 08:33, 21 April 2021
Line 3:		Line 3:
	<StructureSection load='7jun' size='340' side='right'caption='[[7jun]], [[Resolution\|resolution]] 2.30Å' scene=''>		<StructureSection load='7jun' size='340' side='right'caption='[[7jun]], [[Resolution\|resolution]] 2.30Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[7jun]] is a 1 chain structure with sequence from [~~http~~://en.wikipedia.org/wiki/2019-ncov 2019-ncov]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [~~http~~://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[7jun]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/2019-ncov 2019-ncov]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>
	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DOD:DEUTERATED+WATER'>DOD</scene></td></tr>		</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DOD:DEUTERATED+WATER'>DOD</scene></td></tr>
-	<tr id='gene'><td class="sblockLbl"><b>[[Gene\|Gene:]]</b></td><td class="sblockDat">rep, 1a-1b ([~~http~~://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2697049 2019-nCoV])</td></tr>	+	<tr id='gene'><td class="sblockLbl"><b>[[Gene\|Gene:]]</b></td><td class="sblockDat">rep, 1a-1b ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2697049 2019-nCoV])</td></tr>
-	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[~~http~~://en.wikipedia.org/wiki/SARS_coronavirus_main_proteinase SARS coronavirus main proteinase], with EC number [~~http~~://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.69 3.4.22.69] </span></td></tr>	+	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/SARS_coronavirus_main_proteinase SARS coronavirus main proteinase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.69 3.4.22.69] </span></td></tr>
-	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[~~http~~://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [~~http~~://pdbe.org/7jun PDBe], [~~http~~://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [~~http~~://www.ebi.ac.uk/pdbsum/7jun PDBsum], [~~http~~://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>	+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [https://pdbe.org/7jun PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [https://www.ebi.ac.uk/pdbsum/7jun PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
-	[[~~http~~://www.uniprot.org/uniprot/R1AB_SARS2 R1AB_SARS2]] Multifunctional protein involved in the transcription and replication of viral RNAs. Contains the proteinases responsible for the cleavages of the polyprotein.[UniProtKB:P0C6X7] Inhibits host translation by interacting with the 40S ribosomal subunit. The nsp1-40S ribosome complex further induces an endonucleolytic cleavage near the 5'UTR of host mRNAs, targeting them for degradation. Viral mRNAs are not susceptible to nsp1-mediated endonucleolytic RNA cleavage thanks to the presence of a 5'-end leader sequence and are therefore protected from degradation. By suppressing host gene expression, nsp1 facilitates efficient viral gene expression in infected cells and evasion from host immune response.[UniProtKB:P0C6X7] May play a role in the modulation of host cell survival signaling pathway by interacting with host PHB and PHB2. Indeed, these two proteins play a role in maintaining the functional integrity of the mitochondria and protecting cells from various stresses.[UniProtKB:P0C6X7] Responsible for the cleavages located at the N-terminus of the replicase polyprotein. In addition, PL-PRO possesses a deubiquitinating/deISGylating activity and processes both 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains from cellular substrates. Participates together with nsp4 in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication. Antagonizes innate immune induction of type I interferon by blocking the phosphorylation, dimerization and subsequent nuclear translocation of host IRF3. Prevents also host NF-kappa-B signaling.[UniProtKB:P0C6X7] Participates in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication.[UniProtKB:P0C6X7] Cleaves the C-terminus of replicase polyprotein at 11 sites. Recognizes substrates containing the core sequence [ILMVF]-Q-\|-[SGACN] (PubMed:32198291). Also able to bind an ADP-ribose-1''-phosphate (ADRP).[UniProtKB:P0C6X7]<ref>PMID:32198291</ref> Plays a role in the initial induction of autophagosomes from host reticulum endoplasmic. Later, limits the expansion of these phagosomes that are no longer able to deliver viral components to lysosomes.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp8 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp7 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] May participate in viral replication by acting as a ssRNA-binding protein.[UniProtKB:P0C6X7] Plays a pivotal role in viral transcription by stimulating both nsp14 3'-5' exoribonuclease and nsp16 2'-O-methyltransferase activities. Therefore plays an essential role in viral mRNAs cap methylation.[UniProtKB:P0C6X7] Responsible for replication and transcription of the viral RNA genome.[UniProtKB:P0C6X7] Multi-functional protein with a zinc-binding domain in N-terminus displaying RNA and DNA duplex-unwinding activities with 5' to 3' polarity. Activity of helicase is dependent on magnesium.[UniProtKB:P0C6X7] Enzyme possessing two different activities: an exoribonuclease activity acting on both ssRNA and dsRNA in a 3' to 5' direction and a N7-guanine methyltransferase activity. Acts as a proofreading exoribonuclease for RNA replication, thereby lowering The sensitivity of the virus to RNA mutagens.[UniProtKB:P0C6X7] Mn(2+)-dependent, uridylate-specific enzyme, which leaves 2'-3'-cyclic phosphates 5' to the cleaved bond.[UniProtKB:P0C6X7] Methyltransferase that mediates mRNA cap 2'-O-ribose methylation to the 5'-cap structure of viral mRNAs. N7-methyl guanosine cap is a prerequisite for binding of nsp16. Therefore plays an essential role in viral mRNAs cap methylation which is essential to evade immune system.[UniProtKB:P0C6X7]	+	[[https://www.uniprot.org/uniprot/R1AB_SARS2 R1AB_SARS2]] Multifunctional protein involved in the transcription and replication of viral RNAs. Contains the proteinases responsible for the cleavages of the polyprotein.[UniProtKB:P0C6X7] Inhibits host translation by interacting with the 40S ribosomal subunit. The nsp1-40S ribosome complex further induces an endonucleolytic cleavage near the 5'UTR of host mRNAs, targeting them for degradation. Viral mRNAs are not susceptible to nsp1-mediated endonucleolytic RNA cleavage thanks to the presence of a 5'-end leader sequence and are therefore protected from degradation. By suppressing host gene expression, nsp1 facilitates efficient viral gene expression in infected cells and evasion from host immune response.[UniProtKB:P0C6X7] May play a role in the modulation of host cell survival signaling pathway by interacting with host PHB and PHB2. Indeed, these two proteins play a role in maintaining the functional integrity of the mitochondria and protecting cells from various stresses.[UniProtKB:P0C6X7] Responsible for the cleavages located at the N-terminus of the replicase polyprotein. In addition, PL-PRO possesses a deubiquitinating/deISGylating activity and processes both 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains from cellular substrates. Participates together with nsp4 in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication. Antagonizes innate immune induction of type I interferon by blocking the phosphorylation, dimerization and subsequent nuclear translocation of host IRF3. Prevents also host NF-kappa-B signaling.[UniProtKB:P0C6X7] Participates in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication.[UniProtKB:P0C6X7] Cleaves the C-terminus of replicase polyprotein at 11 sites. Recognizes substrates containing the core sequence [ILMVF]-Q-\|-[SGACN] (PubMed:32198291). Also able to bind an ADP-ribose-1''-phosphate (ADRP).[UniProtKB:P0C6X7]<ref>PMID:32198291</ref> Plays a role in the initial induction of autophagosomes from host reticulum endoplasmic. Later, limits the expansion of these phagosomes that are no longer able to deliver viral components to lysosomes.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp8 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp7 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] May participate in viral replication by acting as a ssRNA-binding protein.[UniProtKB:P0C6X7] Plays a pivotal role in viral transcription by stimulating both nsp14 3'-5' exoribonuclease and nsp16 2'-O-methyltransferase activities. Therefore plays an essential role in viral mRNAs cap methylation.[UniProtKB:P0C6X7] Responsible for replication and transcription of the viral RNA genome.[UniProtKB:P0C6X7] Multi-functional protein with a zinc-binding domain in N-terminus displaying RNA and DNA duplex-unwinding activities with 5' to 3' polarity. Activity of helicase is dependent on magnesium.[UniProtKB:P0C6X7] Enzyme possessing two different activities: an exoribonuclease activity acting on both ssRNA and dsRNA in a 3' to 5' direction and a N7-guanine methyltransferase activity. Acts as a proofreading exoribonuclease for RNA replication, thereby lowering The sensitivity of the virus to RNA mutagens.[UniProtKB:P0C6X7] Mn(2+)-dependent, uridylate-specific enzyme, which leaves 2'-3'-cyclic phosphates 5' to the cleaved bond.[UniProtKB:P0C6X7] Methyltransferase that mediates mRNA cap 2'-O-ribose methylation to the 5'-cap structure of viral mRNAs. N7-methyl guanosine cap is a prerequisite for binding of nsp16. Therefore plays an essential role in viral mRNAs cap methylation which is essential to evade immune system.[UniProtKB:P0C6X7]
	<div style="background-color:#fffaf0;">		<div style="background-color:#fffaf0;">
	== Publication Abstract from PubMed ==		== Publication Abstract from PubMed ==
Line 20:		Line 20:
	</div>		</div>
	<div class="pdbe-citations 7jun" style="background-color:#fffaf0;"></div>		<div class="pdbe-citations 7jun" style="background-color:#fffaf0;"></div>
		+
		+	==See Also==
		+	*[[Virus protease 3D structures\|Virus protease 3D structures]]
	== References ==		== References ==
	<references/>		<references/>

OCA at 07:41, 4 November 2020

2020-11-04T07:41:29Z

←Older revision		Revision as of 07:41, 4 November 2020
Line 1:		Line 1:

	==Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temperature==		==Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temperature==
-	<StructureSection load='7jun' size='340' side='right'caption='[[7jun]]' scene=''>	+	<StructureSection load='7jun' size='340' side='right'caption='[[7jun]], [[Resolution\|resolution]] 2.30Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[7jun]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/2019-ncov 2019-ncov]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>
-	</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [http://pdbe.org/7jun PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [http://www.ebi.ac.uk/pdbsum/7jun PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>	+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DOD:DEUTERATED+WATER'>DOD</scene></td></tr>
		+	<tr id='gene'><td class="sblockLbl"><b>[[Gene\|Gene:]]</b></td><td class="sblockDat">rep, 1a-1b ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2697049 2019-nCoV])</td></tr>
		+	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/SARS_coronavirus_main_proteinase SARS coronavirus main proteinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.69 3.4.22.69] </span></td></tr>
		+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [http://pdbe.org/7jun PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [http://www.ebi.ac.uk/pdbsum/7jun PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>
	</table>		</table>
		+	== Function ==
		+	[[http://www.uniprot.org/uniprot/R1AB_SARS2 R1AB_SARS2]] Multifunctional protein involved in the transcription and replication of viral RNAs. Contains the proteinases responsible for the cleavages of the polyprotein.[UniProtKB:P0C6X7] Inhibits host translation by interacting with the 40S ribosomal subunit. The nsp1-40S ribosome complex further induces an endonucleolytic cleavage near the 5'UTR of host mRNAs, targeting them for degradation. Viral mRNAs are not susceptible to nsp1-mediated endonucleolytic RNA cleavage thanks to the presence of a 5'-end leader sequence and are therefore protected from degradation. By suppressing host gene expression, nsp1 facilitates efficient viral gene expression in infected cells and evasion from host immune response.[UniProtKB:P0C6X7] May play a role in the modulation of host cell survival signaling pathway by interacting with host PHB and PHB2. Indeed, these two proteins play a role in maintaining the functional integrity of the mitochondria and protecting cells from various stresses.[UniProtKB:P0C6X7] Responsible for the cleavages located at the N-terminus of the replicase polyprotein. In addition, PL-PRO possesses a deubiquitinating/deISGylating activity and processes both 'Lys-48'- and 'Lys-63'-linked polyubiquitin chains from cellular substrates. Participates together with nsp4 in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication. Antagonizes innate immune induction of type I interferon by blocking the phosphorylation, dimerization and subsequent nuclear translocation of host IRF3. Prevents also host NF-kappa-B signaling.[UniProtKB:P0C6X7] Participates in the assembly of virally-induced cytoplasmic double-membrane vesicles necessary for viral replication.[UniProtKB:P0C6X7] Cleaves the C-terminus of replicase polyprotein at 11 sites. Recognizes substrates containing the core sequence [ILMVF]-Q-\|-[SGACN] (PubMed:32198291). Also able to bind an ADP-ribose-1''-phosphate (ADRP).[UniProtKB:P0C6X7]<ref>PMID:32198291</ref> Plays a role in the initial induction of autophagosomes from host reticulum endoplasmic. Later, limits the expansion of these phagosomes that are no longer able to deliver viral components to lysosomes.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp8 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] Forms a hexadecamer with nsp7 (8 subunits of each) that may participate in viral replication by acting as a primase. Alternatively, may synthesize substantially longer products than oligonucleotide primers.[UniProtKB:P0C6X7] May participate in viral replication by acting as a ssRNA-binding protein.[UniProtKB:P0C6X7] Plays a pivotal role in viral transcription by stimulating both nsp14 3'-5' exoribonuclease and nsp16 2'-O-methyltransferase activities. Therefore plays an essential role in viral mRNAs cap methylation.[UniProtKB:P0C6X7] Responsible for replication and transcription of the viral RNA genome.[UniProtKB:P0C6X7] Multi-functional protein with a zinc-binding domain in N-terminus displaying RNA and DNA duplex-unwinding activities with 5' to 3' polarity. Activity of helicase is dependent on magnesium.[UniProtKB:P0C6X7] Enzyme possessing two different activities: an exoribonuclease activity acting on both ssRNA and dsRNA in a 3' to 5' direction and a N7-guanine methyltransferase activity. Acts as a proofreading exoribonuclease for RNA replication, thereby lowering The sensitivity of the virus to RNA mutagens.[UniProtKB:P0C6X7] Mn(2+)-dependent, uridylate-specific enzyme, which leaves 2'-3'-cyclic phosphates 5' to the cleaved bond.[UniProtKB:P0C6X7] Methyltransferase that mediates mRNA cap 2'-O-ribose methylation to the 5'-cap structure of viral mRNAs. N7-methyl guanosine cap is a prerequisite for binding of nsp16. Therefore plays an essential role in viral mRNAs cap methylation which is essential to evade immune system.[UniProtKB:P0C6X7]
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	The main protease (3CL M(pro)) from SARS-CoV-2, the etiological agent of COVID-19, is an essential enzyme for viral replication. 3CL M(pro) possesses an unusual catalytic dyad composed of Cys145 and His41 residues. A critical question in the field has been what the protonation states of the ionizable residues in the substrate-binding active site cavity are; resolving this point would help understand the catalytic details of the enzyme and inform rational drug development against this pernicious virus. Here, we present the room-temperature neutron structure of 3CL M(pro), which allowed direct determination of hydrogen atom positions and, hence, protonation states in the protease. We observe that the catalytic site natively adopts a zwitterionic reactive form where Cys145 is in the negatively charged thiolate state, and His41 is doubly protonated and positively charged, instead of the neutral unreactive state usually envisaged. The neutron structure also identified the protonation states, and thus electrical charges, of all other amino acid residues and revealed intricate hydrogen bonding networks in the active site cavity and at the dimer interface. The fine atomic details present in this structure were made possible by the unique scattering properties of the neutron, which is an ideal probe for locating hydrogen positions and experimentally determining protonation states at near-physiological temperature. Our observations provide critical information for structure-assisted and computational drug design, allowing precise tailoring of inhibitors to the enzyme's electrostatic environment.
		+
		+	Unusual zwitterionic catalytic site of SARS-CoV-2 main protease revealed by neutron crystallography.,Kneller DW, Phillips G, Weiss KL, Pant S, Zhang Q, O'Neill HM, Coates L, Kovalevsky A J Biol Chem. 2020 Oct 15. pii: AC120.016154. doi: 10.1074/jbc.AC120.016154. PMID:33060199<ref>PMID:33060199</ref>
		+
		+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
		+	</div>
		+	<div class="pdbe-citations 7jun" style="background-color:#fffaf0;"></div>
		+	== References ==
		+	<references/>
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
		+	[[Category: 2019-ncov]]
	[[Category: Large Structures]]		[[Category: Large Structures]]
-	[[Category: Coates L]]	+	[[Category: SARS coronavirus main proteinase]]
-	[[Category: Kneller DW]]	+	[[Category: Coates, L]]
-	[[Category: Kovalevsky A]]	+	[[Category: Kneller, D W]]
		+	[[Category: Kovalevsky, A]]
		+	[[Category: 3cl mpro]]
		+	[[Category: Drug design]]
		+	[[Category: Enzyme mechanism]]
		+	[[Category: Hydrogen bond]]
		+	[[Category: Hydrolase]]
		+	[[Category: Main protease]]
		+	[[Category: Neutron crystallography]]
		+	[[Category: Protonation state]]
		+	[[Category: Room temperature]]
		+	[[Category: Sars-cov-2]]

OCA at 06:55, 2 September 2020

2020-09-02T06:55:55Z

←Older revision		Revision as of 06:55, 2 September 2020
Line 1:		Line 1:
-	'''Unreleased structure'''

-	~~The entry 7jun is ON HOLD~~	+	==Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temperature==
-		+	<StructureSection load='7jun' size='340' side='right'caption='[[7jun]]' scene=''>
-	~~Authors: Kovalevsky, A., Kneller, D.W., Coates, L.~~	+	== Structural highlights ==
-		+	<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7JUN OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=7JUN FirstGlance]. <br>
-	~~Description:~~ Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temperature	+	</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=7jun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7jun OCA], [http://pdbe.org/7jun PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=7jun RCSB], [http://www.ebi.ac.uk/pdbsum/7jun PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=7jun ProSAT]</span></td></tr>
-	[[~~Category~~: ~~Unreleased Structures~~]]	+	</table>
-	[[~~Category~~: ~~Kovalevsky~~, A]]	+	__TOC__
-	[[Category: Coates, L]]	+	</StructureSection>
-	[[Category: Kneller~~, D.W~~]]	+	[[Category: Large Structures]]
		+	[[Category: Coates L]]
		+	[[Category: Kneller DW]]
		+	[[Category: Kovalevsky A]]

OCA: Protected "7jun" [edit=sysop:move=sysop]

2020-08-26T09:43:34Z

Protected "7jun" [edit=sysop:move=sysop]

←Older revision

Revision as of 09:43, 26 August 2020

OCA: New page: '''Unreleased structure''' The entry 7jun is ON HOLD Authors: Kovalevsky, A., Kneller, D.W., Coates, L. Description: Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temper...

2020-08-26T09:43:32Z

New page: '''Unreleased structure''' The entry 7jun is ON HOLD Authors: Kovalevsky, A., Kneller, D.W., Coates, L. Description: Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temper...

New page

'''Unreleased structure'''

The entry 7jun is ON HOLD

Authors: Kovalevsky, A., Kneller, D.W., Coates, L.

Description: Joint neutron/X-ray structure of SARS-CoV-2 3CL Mpro at room temperature
[[Category: Unreleased Structures]]
[[Category: Kovalevsky, A]]
[[Category: Coates, L]]
[[Category: Kneller, D.W]]