1V5W

Crystal structure of the human Dmc1 protein

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.346 
  • R-Value Work: 0.294 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural basis for octameric ring formation and DNA interaction of the human homologous-pairing protein dmc1

Kinebuchi, T., Kagawa, W., Enomoto, R., Tanaka, K., Miyagawa, K., Shibata, T., Kurumizaka, H., Yokoyama, S.

(2004) Mol.Cell 14: 363-374


  • PubMed Abstract: 

    • The human Dmc1 protein, a RecA/Rad51 homolog, is a meiosis-specific DNA recombinase that catalyzes homologous pairing. RecA and Rad51 form helical filaments, while Dmc1 forms an octameric ring. In the present study, we crystallized the full-length hu ...

    The human Dmc1 protein, a RecA/Rad51 homolog, is a meiosis-specific DNA recombinase that catalyzes homologous pairing. RecA and Rad51 form helical filaments, while Dmc1 forms an octameric ring. In the present study, we crystallized the full-length human Dmc1 protein and solved the structure of the Dmc1 octameric ring. The monomeric structure of the Dmc1 protein closely resembled those of the human and archaeal Rad51 proteins. In addition to the polymerization motif that was previously identified in the Rad51 proteins, we found another hydrogen bonding interaction at the polymer interface, which could explain why Dmc1 forms stable octameric rings instead of helical filaments. Mutagenesis studies identified the inner and outer basic patches that are important for homologous pairing. The inner patch binds both single-stranded and double-stranded DNAs, while the outer one binds single-stranded DNA. Based on these results, we propose a model for the interaction of the Dmc1 rings with DNA.

    Organizational Affiliation: 

    Protein Research Group, RIKEN Genomic Sciences Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Meiotic recombination protein DMC1/LIM15 homolog
A, B
343Homo sapiensMutation(s): 0 
Gene Names: DMC1 (DMC1H, LIM15)
Find proteins for Q14565 (Homo sapiens)
Go to Gene View: DMC1
Go to UniProtKB:  Q14565
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.346 
  • R-Value Work: 0.294 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 124.091α = 90.00
b = 124.091β = 90.00
c = 218.830γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance