Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.79 kDa 
• Atom Count: 2120 
• Modelled Residue Count: 246 
• Deposited Residue Count: 254 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

1JMC

SINGLE STRANDED DNA-BINDING DOMAIN OF HUMAN REPLICATION PROTEIN A BOUND TO SINGLE STRANDED DNA, RPA70 SUBUNIT, RESIDUES 183-420

• DOI: 10.2210/pdb1JMC/pdb
• NDB: PDO001
• BMRB: 5821
• BMRB: 5823
• BMRB: 5822

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


• Deposited: 1996-11-11 Released: 1997-10-16 
• Deposition Author(s): Bochkarev, A., Pfuetzner, R., Edwards, A., Frappier, L.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.330 
• R-Value Work: 0.100 
• R-Value Observed: 0.212 

Literature

Structure of the single-stranded-DNA-binding domain of replication protein A bound to DNA.

Bochkarev, A., Pfuetzner, R.A., Edwards, A.M., Frappier, L.

(1997) Nature 385: 176-181

• PubMed: 8990123 
• DOI: 10.1038/385176a0
• Primary Citation of Related Structures:  
  1JMC


• PubMed Abstract: 
  

The single-stranded-DNA-binding proteins (SSBs) are essential for DNA function in prokaryotic and eukaryotic cells, mitochondria, phages and viruses. The structures of four SSBs have been solved, but the molecular details of the interaction of SSBs with DNA remain speculative. We report here the crystal structure at 2.4 A resolution of the single-stranded-DNA-binding domain of human replication protein A (RPA) bound to DNA. Replication protein A is a heterotrimeric SSB that is highly conserved in eukaryotes. The largest subunit, RPA70, binds to single-stranded (ss)DNA and mediates interactions with many cellular and viral proteins. The DNA-binding domain, which lies in the middle of RPA70, comprises two structurally homologous subdomains oriented in tandem. The ssDNA lies in a channel that extends from one subdomain to the other. The structure of each RPA70 subdomain is similar to those of the bacteriophage SSBs, indicating that the mechanism of ssDNA-binding is conserved.

---

Related Citations: 

• Replication Protein A. Characterization and Crystallization of the DNA Binding Domain
  Pfuetzner, R.A., Bochkarev, A., Frappier, L., Edwards, A.M.
  (1997) J Biol Chem 272: 430

---

Organizational Affiliation: 

Institute for Molecular Biology and Biotechnology, Cancer Research Group, McMaster University, Hamilton, Ontario, Canada.

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (REPLICATION PROTEIN A (RPA))	A	246	Homo sapiens	Mutation(s): 0  Gene Names: RPA1, REPA1, RPA70
Find proteins for P27694 (Homo sapiens) Explore P27694  Go to UniProtKB:  P27694
NIH Common Fund Data Resources
PHAROS:  P27694 GTEx:  ENSG00000132383

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*CP*CP*CP*CP*CP*CP*CP*C)-3')	B	8	N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.330 
• R-Value Work: 0.100 
• R-Value Observed: 0.212 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 34.25	α = 90
b = 77.99	β = 90
c = 95.36	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASES	phasing
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-11-11 
• Released Date: 1997-10-16 
Deposition Author(s): Bochkarev, A., Pfuetzner, R., Edwards, A., Frappier, L.

Revision History  

• Version 1.0: 1997-10-16
  Type: Initial release
  
• Version 1.1: 2008-05-22
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance