2V7E

Crystal structure of coactivator-associated arginine methyltransferase 1 (CARM1), unliganded


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Insights Into Histone Code Syntax from Structural and Biochemical Studies of Carm1 Methyltransferase

Yue, W.W.Hassler, M.Roe, S.M.Thompson-Vale, V.Pearl, L.H.

(2007) EMBO J 26: 4402

  • DOI: 10.1038/sj.emboj.7601856
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Coactivator-associated arginine methyltransferase (CARM1) is a transcriptional coactivator that methylates Arg17 and Arg26 in histone H3. CARM1 contains a conserved protein arginine methyltransferase (PRMT) catalytic core flanked by unique pre- and p ...

    Coactivator-associated arginine methyltransferase (CARM1) is a transcriptional coactivator that methylates Arg17 and Arg26 in histone H3. CARM1 contains a conserved protein arginine methyltransferase (PRMT) catalytic core flanked by unique pre- and post-core regions. The crystal structures of the CARM1 catalytic core in the apo and holo states reveal cofactor-dependent formation of a substrate-binding groove providing a specific access channel for arginine to the active site. The groove is supported by the first eight residues of the post-core region (C-extension), not present in other PRMTs. In vitro methylation assays show that the C-extension is essential for all histone H3 methylation activity, whereas the pre-core region is required for methylation of Arg26, but not Arg17. Kinetic analysis shows Arg17 methylation is potentiated by pre-acetylation of Lys18, and this is reflected in k(cat) rather than K(m). Together with the absence of specificity subsites in the structure, this suggests an electrostatic sensing mechanism for communicating the modification status of vicinal residues as part of the syntax of the 'histone code.'


    Organizational Affiliation

    Cancer Research-UK DNA Repair Enzyme Research Group, Section of Structural Biology, Chester Beatty Laboratories, Institute of Cancer Research, London, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HISTONE-ARGININE METHYLTRANSFERASE CARM1
A, B
346Mus musculusMutation(s): 0 
Gene Names: Carm1Prmt4
EC: 2.1.1 (PDB Primary Data), 2.1.1.319 (UniProt)
Find proteins for Q9WVG6 (Mus musculus)
Go to UniProtKB:  Q9WVG6
NIH Common Fund Data Resources
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download CCD File 
A, B
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.230 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.146α = 90
b = 98.018β = 90
c = 206.915γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance