Macromolecule Content

• Total Structure Weight: 26.11 kDa 
• Atom Count: 1603 
• Modelled Residue Count: 200 
• Deposited Residue Count: 234 
• Unique protein chains: 2

1Z1D

Structural Model for the interaction between RPA32 C-terminal domain and SV40 T antigen origin binding domain.

• DOI: 10.2210/pdb1Z1D/pdb
• BMRB: 6535

• Classification: REPLICATION
• Organism(s): Homo sapiens, Macaca mulatta polyomavirus 1
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2005-03-03 Released: 2005-05-17 
• Deposition Author(s): Arunkumar, A.I., Klimovich, V., Jiang, X., Ott, R.D., Mizoue, L., Fanning, E., Chazin, W.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with acceptable covalent geometry,structures with favorable non-bond energy 

Literature

Insights into hRPA32 C-terminal domain--mediated assembly of the simian virus 40 replisome.

Arunkumar, A.I., Klimovich, V., Jiang, X., Ott, R.D., Mizoue, L., Fanning, E., Chazin, W.J.

(2005) Nat Struct Mol Biol 12: 332-339

• PubMed: 15793585 
• DOI: 10.1038/nsmb916
• Primary Citation of Related Structures:  
  1Z1D


• PubMed Abstract: 
  

Simian virus 40 (SV40) provides a model system for the study of eukaryotic DNA replication, in which the viral protein, large T antigen (Tag), marshals human proteins to replicate the viral minichromosome. SV40 replication requires interaction of Tag with the host single-stranded DNA-binding protein, replication protein A (hRPA). The C-terminal domain of the hRPA32 subunit (RPA32C) facilitates initiation of replication, but whether it interacts with Tag is not known. Affinity chromatography and NMR revealed physical interaction between hRPA32C and the Tag origin DNA-binding domain, and a structural model of the complex was determined. Point mutations were then designed to reverse charges in the binding sites, resulting in substantially reduced binding affinity. Corresponding mutations introduced into intact hRPA impaired initiation of replication and primosome activity, implying that this interaction has a critical role in assembly and progression of the SV40 replisome.

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Related Citations: 

• Structural basis for the recognition of DNA repair proteins UNG2, XPA, and RAD52 by replication factor A
  Mer, G., Bochkarev, A., Gupta, R., Bochkareva, E., Frappier, L., Ingles, C.M., Edwards, A.M., Chazin, W.J.
  (2000) Cell 103: 449

• Solution structure of the origin DNA binding domain of SV40 T antigen
  Luo, X., Sanford, D.G., Bullock, P.A., Bachovchin, W.W.
  (1996) Nat Struct Mol Biol 3: 1034

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Organizational Affiliation: 

Department of Biochemistry, Vanderbilt University, Nashville Tennessee 37232-8725 USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Replication protein A 32 kDa subunit	A	103	Homo sapiens	Mutation(s): 0  Gene Names: RPA2, REPA2, RPA32, RPA34
UniProt & NIH Common Fund Data Resources
Find proteins for P15927 (Homo sapiens) Explore P15927  Go to UniProtKB:  P15927
PHAROS:  P15927 GTEx:  ENSG00000117748

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Large T antigen	B	131	Macaca mulatta polyomavirus 1	Mutation(s): 0  EC: 3.6.4
UniProt
Find proteins for P03070 (Simian virus 40) Explore P03070  Go to UniProtKB:  P03070

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with acceptable covalent geometry,structures with favorable non-bond energy 
• OLDERADO: 1Z1D Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-03-03 
• Released Date: 2005-05-17 
Deposition Author(s): Arunkumar, A.I., Klimovich, V., Jiang, X., Ott, R.D., Mizoue, L., Fanning, E., Chazin, W.J.

Revision History  

• Version 1.0: 2005-05-17
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance