5osy

From Proteopedia

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Revision as of 05:50, 16 May 2018

Human Decapping Scavenger enzyme (hDcpS) in complex with m7G(5'S)ppSp(5'S)G mRNA 5' cap analog

Structural highlights

5osy is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	DCPS, DCS1, HINT5, HSPC015 (HUMAN)
Activity:	5'-(N(7)-methyl 5'-triphosphoguanosine)-(mRNA) diphosphatase, with EC number 3.6.1.59
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[DCPS_HUMAN] Decapping scavenger enzyme that catalyzes the cleavage of a residual cap structure following the degradation of mRNAs by the 3'->5' exosome-mediated mRNA decay pathway. Hydrolyzes cap analog structures like 7-methylguanosine nucleoside triphosphate (m7GpppG) with up to 10 nucleotide substrates (small capped oligoribonucleotides) and specifically releases 5'-phosphorylated RNA fragments and 7-methylguanosine monophosphate (m7GMP). Cleaves cap analog structures like tri-methyl guanosine nucleoside triphosphate (m3(2,2,7)GpppG) with very poor efficiency. Does not hydrolyze unmethylated cap analog (GpppG) and shows no decapping activity on intact m7GpppG-capped mRNA molecules longer than 25 nucleotides. Does not hydrolyze 7-methylguanosine diphosphate (m7GDP) to m7GMP (PubMed:22985415). May also play a role in the 5'->3 mRNA decay pathway; m7GDP, the downstream product released by the 5'->3' mRNA mediated decapping activity, may be also converted by DCPS to m7GMP (PubMed:14523240). Binds to m7GpppG and strongly to m7GDP. Plays a role in first intron splicing of pre-mRNAs. Inhibits activation-induced cell death.^[1] ^[2] ^[3] ^[4] ^[5] ^[6] ^[7] ^[8] ^[9] ^[10]

Publication Abstract from PubMed

The 5' cap consists of 7-methylguanosine (m(7)G) linked by a 5'-5'-triphosphate bridge to messenger RNA (mRNA) and acts as the master regulator of mRNA turnover and translation initiation in eukaryotes. Cap analogues that influence mRNA translation and turnover (either as small molecules or as part of an RNA transcript) are valuable tools for studying gene expression, which is often also of therapeutic relevance. Here, we synthesized a series of 15 dinucleotide cap (m(7)GpppG) analogues containing a 5'-phosphorothiolate (5'-PSL) moiety (i.e., an O-to-S substitution within the 5'-phosphoester) and studied their biological properties in the context of three major cap-binding proteins: translation initiation factor 4E (eIF4E) and two decapping enzymes, DcpS and Dcp2. While the 5'-PSL moiety was neutral or slightly stabilizing for cap interactions with eIF4E, it significantly influenced susceptibility to decapping. Replacing the gamma-phosphoester with the 5'-PSL moiety (gamma-PSL) prevented beta-gamma-pyrophosphate bond cleavage by DcpS and conferred strong inhibitory properties. Combining the gamma-PSL moiety with alpha-PSL and beta-phosphorothioate (PS) moiety afforded first cap-derived hDcpS inhibitor with low nanomolar potency. Susceptibility to Dcp2 and translational properties were studied after incorporation of the new analogues into mRNA transcripts by RNA polymerase. Transcripts containing the gamma-PSL moiety were resistant to cleavage by Dcp2. Surprisingly, superior translational properties were observed for mRNAs containing the alpha-PSL moiety, which were Dcp2-susceptible. The overall protein expression measured in HeLa cells for this mRNA was comparable to mRNA capped with the translation augmenting beta-PS analogue reported previously. Overall, our study highlights 5'-PSL as a synthetically accessible cap modification, which, depending on the substitution site, can either reduce susceptibility to decapping or confer superior translational properties on the mRNA. The 5'-PSL-analogues may find application as reagents for the preparation of efficiently expressed mRNA or for investigation of the role of decapping enzymes in mRNA processing or neuromuscular disorders associated with decapping.

5'-Phosphorothiolate Dinucleotide Cap Analogues: Reagents for Messenger RNA Modification and Potent Small-Molecular Inhibitors of Decapping Enzymes.,Wojtczak BA, Sikorski PJ, Fac-Dabrowska K, Nowicka A, Warminski M, Kubacka D, Nowak E, Nowotny M, Kowalska J, Jemielity J J Am Chem Soc. 2018 May 1. doi: 10.1021/jacs.8b02597. PMID:29676910^[11]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Liu H, Rodgers ND, Jiao X, Kiledjian M. The scavenger mRNA decapping enzyme DcpS is a member of the HIT family of pyrophosphatases. EMBO J. 2002 Sep 2;21(17):4699-708. PMID:12198172
↑ Kwasnicka DA, Krakowiak A, Thacker C, Brenner C, Vincent SR. Coordinate expression of NADPH-dependent flavin reductase, Fre-1, and Hint-related 7meGMP-directed hydrolase, DCS-1. J Biol Chem. 2003 Oct 3;278(40):39051-8. Epub 2003 Jul 18. PMID:12871939 doi:http://dx.doi.org/10.1074/jbc.M306355200
↑ Wang Z, Kiledjian M. Functional link between the mammalian exosome and mRNA decapping. Cell. 2001 Dec 14;107(6):751-62. PMID:11747811
↑ van Dijk E, Le Hir H, Seraphin B. DcpS can act in the 5'-3' mRNA decay pathway in addition to the 3'-5' pathway. Proc Natl Acad Sci U S A. 2003 Oct 14;100(21):12081-6. Epub 2003 Oct 1. PMID:14523240 doi:http://dx.doi.org/10.1073/pnas.1635192100
↑ Liu SW, Jiao X, Liu H, Gu M, Lima CD, Kiledjian M. Functional analysis of mRNA scavenger decapping enzymes. RNA. 2004 Sep;10(9):1412-22. Epub 2004 Jul 23. PMID:15273322 doi:http://dx.doi.org/10.1261/rna.7660804
↑ Cohen LS, Mikhli C, Friedman C, Jankowska-Anyszka M, Stepinski J, Darzynkiewicz E, Davis RE. Nematode m7GpppG and m3(2,2,7)GpppG decapping: activities in Ascaris embryos and characterization of C. elegans scavenger DcpS. RNA. 2004 Oct;10(10):1609-24. PMID:15383679 doi:http://dx.doi.org/10.1261/rna.7690504
↑ Kwasnicka-Crawford DA, Vincent SR. Role of a novel dual flavin reductase (NR1) and an associated histidine triad protein (DCS-1) in menadione-induced cytotoxicity. Biochem Biophys Res Commun. 2005 Oct 21;336(2):565-71. PMID:16140270 doi:http://dx.doi.org/S0006-291X(05)01784-5
↑ Shen V, Liu H, Liu SW, Jiao X, Kiledjian M. DcpS scavenger decapping enzyme can modulate pre-mRNA splicing. RNA. 2008 Jun;14(6):1132-42. doi: 10.1261/rna.1008208. Epub 2008 Apr 21. PMID:18426921 doi:http://dx.doi.org/10.1261/rna.1008208
↑ Wypijewska A, Bojarska E, Lukaszewicz M, Stepinski J, Jemielity J, Davis RE, Darzynkiewicz E. 7-methylguanosine diphosphate (m(7)GDP) is not hydrolyzed but strongly bound by decapping scavenger (DcpS) enzymes and potently inhibits their activity. Biochemistry. 2012 Oct 9;51(40):8003-13. doi: 10.1021/bi300781g. Epub 2012 Sep, 25. PMID:22985415 doi:http://dx.doi.org/10.1021/bi300781g
↑ Chen N, Walsh MA, Liu Y, Parker R, Song H. Crystal structures of human DcpS in ligand-free and m7GDP-bound forms suggest a dynamic mechanism for scavenger mRNA decapping. J Mol Biol. 2005 Apr 8;347(4):707-18. PMID:15769464 doi:10.1016/j.jmb.2005.01.062
↑ Wojtczak BA, Sikorski PJ, Fac-Dabrowska K, Nowicka A, Warminski M, Kubacka D, Nowak E, Nowotny M, Kowalska J, Jemielity J. 5'-Phosphorothiolate Dinucleotide Cap Analogues: Reagents for Messenger RNA Modification and Potent Small-Molecular Inhibitors of Decapping Enzymes. J Am Chem Soc. 2018 May 1. doi: 10.1021/jacs.8b02597. PMID:29676910 doi:http://dx.doi.org/10.1021/jacs.8b02597

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5osy"

@@ Line 3: / Line 3: @@
 <StructureSection load='5osy' size='340' side='right' caption='[[5osy]], [[Resolution|resolution]] 2.06&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5osy]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5OSY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5OSY FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5osy]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5OSY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5OSY FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AJQ:[(2~{S},3~{S},4~{R},5~{R})-5-(2-azanyl-7-methyl-6-oxidanylidene-1~{H}-purin-7-ium-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methylsulfanyl-[[[(2~{S},3~{S},4~{R},5~{R})-5-(2-azanyl-6-oxidanylidene-3~{H}-purin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methylsulfanyl-oxidanyl-phosphoryl]oxy-sulfanyl-phosphoryl]oxy-phosphinic+acid'>AJQ</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DCPS, DCS1, HINT5, HSPC015 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/5'-(N(7)-methyl_5'-triphosphoguanosine)-(mRNA)_diphosphatase 5'-(N(7)-methyl 5'-triphosphoguanosine)-(mRNA) diphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.59 3.6.1.59] </span></td></tr>
 <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=5osy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5osy OCA], [http://pdbe.org/5osy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5osy RCSB], [http://www.ebi.ac.uk/pdbsum/5osy PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5osy ProSAT]</span></td></tr>
@@ Line 23: / Line 24: @@
 __TOC__
 </StructureSection>
+[[Category: Human]]
 [[Category: Fac-Dabrowska, K]]
 [[Category: Jemielity, J]]

5osy

From Proteopedia

Revision as of 05:50, 16 May 2018

Human Decapping Scavenger enzyme (hDcpS) in complex with m7G(5'S)ppSp(5'S)G mRNA 5' cap analog

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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