2oqb

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(Difference between revisions)

Revision as of 06:49, 22 August 2018

Crystal structure of the N-terminal domain of coactivator-associated methyltransferase 1 (CARM1)

Structural highlights

2oqb is a 2 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	Carm1, Prmt4 (Buffalo rat)
Activity:	Histone-arginine N-methyltransferase, with EC number 2.1.1.125
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CARM1_RAT] 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 activates 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] Isoform 3 specifically affects pre-mRNA splicing. This activity is independent from methyltransferase activity.^[2]

Publication Abstract from PubMed

Coactivator-associated arginine methyltransferase 1 (CARM1), a protein arginine methyltransferase recruited by several transcription factors, methylates a large variety of proteins and plays a critical role in gene expression. We report, in this paper, four crystal structures of isolated modules of CARM1. The 1.7 A crystal structure of the N-terminal domain of CARM1 reveals an unexpected PH domain, a scaffold frequently found to regulate protein-protein interactions in a large variety of biological processes. Three crystal structures of the CARM1 catalytic module, two free and one cofactor-bound forms (refined at 2.55 A, 2.4 A and 2.2 A, respectively) reveal large structural modifications including disorder to order transition, helix to strand transition and active site modifications. The N-terminal and the C-terminal end of CARM1 catalytic module contain molecular switches that may inspire how CARM1 regulates its biological activities by protein-protein interactions.

Functional insights from structures of coactivator-associated arginine methyltransferase 1 domains.,Troffer-Charlier N, Cura V, Hassenboehler P, Moras D, Cavarelli J EMBO J. 2007 Oct 17;26(20):4391-401. Epub 2007 Sep 20. PMID:17882262^[3]

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

References

↑ Ohkura N, Takahashi M, Yaguchi H, Nagamura Y, Tsukada T. Coactivator-associated arginine methyltransferase 1, CARM1, affects pre-mRNA splicing in an isoform-specific manner. J Biol Chem. 2005 Aug 12;280(32):28927-35. Epub 2005 Jun 8. PMID:15944154 doi:http://dx.doi.org/M502173200
↑ Ohkura N, Takahashi M, Yaguchi H, Nagamura Y, Tsukada T. Coactivator-associated arginine methyltransferase 1, CARM1, affects pre-mRNA splicing in an isoform-specific manner. J Biol Chem. 2005 Aug 12;280(32):28927-35. Epub 2005 Jun 8. PMID:15944154 doi:http://dx.doi.org/M502173200
↑ Troffer-Charlier N, Cura V, Hassenboehler P, Moras D, Cavarelli J. Functional insights from structures of coactivator-associated arginine methyltransferase 1 domains. EMBO J. 2007 Oct 17;26(20):4391-401. Epub 2007 Sep 20. PMID:17882262

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/2oqb"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the N-terminal domain of coactivator-associated methyltransferase 1 (CARM1)==
 <StructureSection load='2oqb' size='340' side='right' caption='[[2oqb]], [[Resolution|resolution]] 1.69&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Carm1, Prmt4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histone-arginine_N-methyltransferase Histone-arginine N-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.125 2.1.1.125] </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=2oqb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2oqb OCA], [http://pdbe.org/2oqb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2oqb RCSB], [http://www.ebi.ac.uk/pdbsum/2oqb PDBsum]</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=2oqb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2oqb OCA], [http://pdbe.org/2oqb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2oqb RCSB], [http://www.ebi.ac.uk/pdbsum/2oqb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2oqb ProSAT]</span></td></tr>
 </table>
 == Function ==

2oqb

From Proteopedia

Revision as of 06:49, 22 August 2018

Crystal structure of the N-terminal domain of coactivator-associated methyltransferase 1 (CARM1)

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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