2y1x

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Revision as of 03:29, 25 December 2014

CRYSTAL STRUCTURE OF COACTIVATOR ASSOCIATED ARGININE METHYLTRANSFERASE 1 (CARM1) IN COMPLEX WITH SINEFUNGIN AND INDOLE INHIBITOR

Structural highlights

2y1x is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	2y1w
Activity:	Histone-arginine N-methyltransferase, with EC number 2.1.1.125
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[CARM1_HUMAN] Methylates (mono- and asymmetric dimethylation) the guanidino nitrogens of arginyl residues in several proteins involved in DNA packaging, transcription regulation, pre-mRNA splicing, and mRNA stability. Recruited to promoters upon gene activation together with histone acetyltransferases from EP300/P300 and p160 families, methylates histone H3 at 'Arg-17' (H3R17me), forming mainly asymmetric dimethylarginine (H3R17me2a), leading to activate transcription via chromatin remodeling. During nuclear hormone receptor activation and TCF7L2/TCF4 activation, acts synergically with EP300/P300 and either one of the p160 histone acetyltransferases NCOA1/SRC1, NCOA2/GRIP1 and NCOA3/ACTR or CTNNB1/beta-catenin to activate transcription. During myogenic transcriptional activation, acts together with NCOA3/ACTR as a coactivator for MEF2C. During monocyte inflammatory stimulation, acts together with EP300/P300 as a coactivator for NF-kappa-B. Acts as coactivator for PPARG, promotes adipocyte differentiation and the accumulation of brown fat tissue. Plays a role in the regulation of pre-mRNA alternative splicing by methylation of splicing factors. Also seems to be involved in p53/TP53 transcriptional activation. Methylates EP300/P300, both at 'Arg-2142', which may loosen its interaction with NCOA2/GRIP1, and at 'Arg-580' and 'Arg-604' in the KIX domain, which impairs its interaction with CREB and inhibits CREB-dependent transcriptional activation. Also methylates arginine residues in RNA-binding proteins PABPC1, ELAVL1 and ELAV4, which may affect their mRNA-stabilizing properties and the half-life of their target mRNAs.^[1] ^[2]

Publication Abstract from PubMed

CARM1 (co-activator-associated arginine methyltransferase 1) is a PRMT (protein arginine N-methyltransferase) family member that catalyses the transfer of methyl groups from SAM (S-adenosylmethionine) to the side chain of specific arginine residues of substrate proteins. This post-translational modification of proteins regulates a variety of transcriptional events and other cellular processes. Moreover, CARM1 is a potential oncological target due to its multiple roles in transcription activation by nuclear hormone receptors and other transcription factors such as p53. Here, we present crystal structures of the CARM1 catalytic domain in complex with cofactors [SAH (S-adenosyl-L-homocysteine) or SNF (sinefungin)] and indole or pyazole inhibitors. Analysis of the structures reveals that the inhibitors bind in the arginine-binding cavity and the surrounding pocket that exists at the interface between the N- and C-terminal domains. In addition, we show using ITC (isothermal titration calorimetry) that the inhibitors bind to the CARM1 catalytic domain only in the presence of the cofactor SAH. Furthermore, sequence differences for select residues that interact with the inhibitors may be responsible for the CARM1 selectivity against PRMT1 and PRMT3. Together, the structural and biophysical information should aid in the design of both potent and specific inhibitors of CARM1.

Structural basis for CARM1 inhibition by indole and pyrazole inhibitors.,Sack JS, Thieffine S, Bandiera T, Fasolini M, Duke GJ, Jayaraman L, Kish KF, Klei HE, Purandare AV, Rosettani P, Troiani S, Xie D, Bertrand JA Biochem J. 2011 Jun 1;436(2):331-9. PMID:21410432^[3]

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

References

↑ Miao F, Li S, Chavez V, Lanting L, Natarajan R. Coactivator-associated arginine methyltransferase-1 enhances nuclear factor-kappaB-mediated gene transcription through methylation of histone H3 at arginine 17. Mol Endocrinol. 2006 Jul;20(7):1562-73. Epub 2006 Feb 23. PMID:16497732 doi:me.2005-0365
↑ Lakowski TM, Frankel A. Kinetic analysis of human protein arginine N-methyltransferase 2: formation of monomethyl- and asymmetric dimethyl-arginine residues on histone H4. Biochem J. 2009 Jun 26;421(2):253-61. doi: 10.1042/BJ20090268. PMID:19405910 doi:10.1042/BJ20090268
↑ Sack JS, Thieffine S, Bandiera T, Fasolini M, Duke GJ, Jayaraman L, Kish KF, Klei HE, Purandare AV, Rosettani P, Troiani S, Xie D, Bertrand JA. Structural basis for CARM1 inhibition by indole and pyrazole inhibitors. Biochem J. 2011 Jun 1;436(2):331-9. PMID:21410432 doi:10.1042/BJ20102161

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2y1x"

@@ Line 8: / Line 8: @@
 <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=2y1x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2y1x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2y1x RCSB], [http://www.ebi.ac.uk/pdbsum/2y1x PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/CARM1_HUMAN CARM1_HUMAN]] Methylates (mono- and asymmetric dimethylation) the guanidino nitrogens of arginyl residues in several proteins involved in DNA packaging, transcription regulation, pre-mRNA splicing, and mRNA stability. Recruited to promoters upon gene activation together with histone acetyltransferases from EP300/P300 and p160 families, methylates histone H3 at 'Arg-17' (H3R17me), forming mainly asymmetric dimethylarginine (H3R17me2a), leading to activate transcription via chromatin remodeling. During nuclear hormone receptor activation and TCF7L2/TCF4 activation, acts synergically with EP300/P300 and either one of the p160 histone acetyltransferases NCOA1/SRC1, NCOA2/GRIP1 and NCOA3/ACTR or CTNNB1/beta-catenin to activate transcription. During myogenic transcriptional activation, acts together with NCOA3/ACTR as a coactivator for MEF2C. During monocyte inflammatory stimulation, acts together with EP300/P300 as a coactivator for NF-kappa-B. Acts as coactivator for PPARG, promotes adipocyte differentiation and the accumulation of brown fat tissue. Plays a role in the regulation of pre-mRNA alternative splicing by methylation of splicing factors. Also seems to be involved in p53/TP53 transcriptional activation. Methylates EP300/P300, both at 'Arg-2142', which may loosen its interaction with NCOA2/GRIP1, and at 'Arg-580' and 'Arg-604' in the KIX domain, which impairs its interaction with CREB and inhibits CREB-dependent transcriptional activation. Also methylates arginine residues in RNA-binding proteins PABPC1, ELAVL1 and ELAV4, which may affect their mRNA-stabilizing properties and the half-life of their target mRNAs.<ref>PMID:16497732</ref> <ref>PMID:19405910</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==

2y1x

From Proteopedia

Revision as of 03:29, 25 December 2014

CRYSTAL STRUCTURE OF COACTIVATOR ASSOCIATED ARGININE METHYLTRANSFERASE 1 (CARM1) IN COMPLEX WITH SINEFUNGIN AND INDOLE INHIBITOR

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

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