Macromolecule Content

• Total Structure Weight: 12.55 kDa 
• Atom Count: 528 
• Modelled Residue Count: 70 
• Deposited Residue Count: 114 
• Unique protein chains: 1

1B22

RAD51 (N-TERMINAL DOMAIN)

• DOI: 10.2210/pdb1B22/pdb
• BMRB: 4328

• Classification: DNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-12-04 Released: 1999-12-03 
• Deposition Author(s): Aihara, H., Ito, Y., Kurumizaka, H., Yokoyama, S., Shibata, T., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 140 
• Conformers Submitted: 30 
• Selection Criteria: LEAST TARGET FUNCTION VALUES 

Literature

The N-terminal domain of the human Rad51 protein binds DNA: structure and a DNA binding surface as revealed by NMR.

Aihara, H., Ito, Y., Kurumizaka, H., Yokoyama, S., Shibata, T.

(1999) J Mol Biol 290: 495-504

• PubMed: 10390347 
• DOI: 10.1006/jmbi.1999.2904
• Primary Citation of Related Structures:  
  1B22


• PubMed Abstract: 
  

Human Rad51 protein (HsRad51) is a homolog of Escherichia coli RecA protein, and functions in DNA repair and recombination. In higher eukaryotes, Rad51 protein is essential for cell viability. The N-terminal region of HsRad51 is highly conserved among eukaryotic Rad51 proteins but is absent from RecA, suggesting a Rad51-specific function for this region. Here, we have determined the structure of the N-terminal part of HsRad51 by NMR spectroscopy. The N-terminal region forms a compact domain consisting of five short helices, which shares structural similarity with a domain of endonuclease III, a DNA repair enzyme of E. coli. NMR experiments did not support the involvement of the N-terminal domain in HsRad51-HsBrca2 interaction or the self-association of HsRad51 as proposed by previous studies. However, NMR tiration experiments demonstrated a physical interaction of the domain with DNA, and allowed mapping of the DNA binding surface. Mutation analysis showed that the DNA binding surface is essential for double-stranded and single-stranded DNA binding of HsRad51. Our results suggest the presence of a DNA binding site on the outside surface of the HsRad51 filament and provide a possible explanation for the regulation of DNA binding by phosphorylation within the N-terminal domain.

---

Organizational Affiliation: 

Cellular & Molecular Biology Laboratory, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA REPAIR PROTEIN RAD51	A	114	Homo sapiens	Mutation(s): 0  Gene Names: RAD51, RAD51A, RECA
Find proteins for Q06609 (Homo sapiens) Explore Q06609  Go to UniProtKB:  Q06609
NIH Common Fund Data Resources
PHAROS:  Q06609 GTEx:  ENSG00000051180

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 140 
• Conformers Submitted: 30 
• Selection Criteria: LEAST TARGET FUNCTION VALUES 
• OLDERADO: 1B22 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-12-04 
• Released Date: 1999-12-03 
Deposition Author(s): Aihara, H., Ito, Y., Kurumizaka, H., Yokoyama, S., Shibata, T., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

Revision History  

• Version 1.0: 1999-12-03
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance