6k4y

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==CryoEM structure of sigma appropriation complex==
==CryoEM structure of sigma appropriation complex==
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<StructureSection load='6k4y' size='340' side='right'caption='[[6k4y]], [[Resolution|resolution]] 3.79&Aring;' scene=''>
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<SX load='6k4y' size='340' side='right' viewer='molstar' caption='[[6k4y]], [[Resolution|resolution]] 3.79&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[6k4y]] is a 10 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6K4Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6K4Y FirstGlance]. <br>
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<table><tr><td colspan='2'>[[6k4y]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12] and [https://en.wikipedia.org/wiki/Escherichia_virus_T4 Escherichia virus T4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6K4Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6K4Y FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.79&#8491;</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_RNA_polymerase DNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.6 2.7.7.6] </span></td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6k4y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6k4y OCA], [http://pdbe.org/6k4y PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6k4y RCSB], [http://www.ebi.ac.uk/pdbsum/6k4y PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6k4y ProSAT]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6k4y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6k4y OCA], [https://pdbe.org/6k4y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6k4y RCSB], [https://www.ebi.ac.uk/pdbsum/6k4y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6k4y ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/ASIA_BPT4 ASIA_BPT4]] Transcriptional inhibitor. Inhibits sigma 70-directed transcription by weakening its interaction with the core of the host's RNA polymerase. This allows Gp55 to successfully compete for the core enzyme. Plays an important role during the prereplicative period of phage T4 development.<ref>PMID:8021178</ref> <ref>PMID:15257291</ref> [[http://www.uniprot.org/uniprot/RPOC_ECOLI RPOC_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01322] [[http://www.uniprot.org/uniprot/MOTA_BPT4 MOTA_BPT4]] Required for the transcriptional activation of middle promoters. Middle promoters are characterized by the presence of the conserved sequence [AT]3TGCTTNA (MotA box). MotA binds directly to MotA boxes. [[http://www.uniprot.org/uniprot/RPOB_ECOLI RPOB_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321] [[http://www.uniprot.org/uniprot/RPOA_ECOLI RPOA_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. This subunit plays an important role in subunit assembly since its dimerization is the first step in the sequential assembly of subunits to form the holoenzyme.[HAMAP-Rule:MF_00059] [[http://www.uniprot.org/uniprot/RPOZ_ECOLI RPOZ_ECOLI]] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits.[HAMAP-Rule:MF_00366] [[http://www.uniprot.org/uniprot/RPOD_ECOLI RPOD_ECOLI]] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This is the primary sigma factor of this bacterium.
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[https://www.uniprot.org/uniprot/RPOA_ECOLI RPOA_ECOLI] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. This subunit plays an important role in subunit assembly since its dimerization is the first step in the sequential assembly of subunits to form the holoenzyme.[HAMAP-Rule:MF_00059]
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== References ==
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<references/>
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==See Also==
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*[[RNA polymerase 3D structures|RNA polymerase 3D structures]]
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*[[Sigma factor 3D structures|Sigma factor 3D structures]]
__TOC__
__TOC__
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</StructureSection>
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</SX>
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[[Category: DNA-directed RNA polymerase]]
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[[Category: Escherichia coli K-12]]
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[[Category: Escherichia virus T4]]
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Feng, Y]]
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[[Category: Feng Y]]
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[[Category: Shi, J]]
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[[Category: Shi J]]
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[[Category: Wen, A]]
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[[Category: Wen A]]
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[[Category: Promoter]]
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[[Category: Rna polymerase]]
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[[Category: Sigma appropriation]]
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[[Category: Transcription]]
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[[Category: Transcription activation]]
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Current revision

CryoEM structure of sigma appropriation complex

6k4y, resolution 3.79Å

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