ISDA

Deposition Date 2005-03-03

Release Date 2005-05-17

Last Version Date 2024-05-22

Entry Detail

PDB ID:

1Z1D

Keywords:

REPLICATION

Title:

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

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)
Simian virus 40 (Taxon ID: 10633)

Host Organism:

Escherichia coli BL21(DE3)

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

200

Conformers Submitted:

Selection Criteria:

structures with acceptable covalent geometry,structures with favorable non-bond energy

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Replication protein A 32 kDa subunit
Gene (Uniprot):RPA2
Chain IDs:A
Chain Length:103
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P15927 Pfam ID:PF08784

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Large T antigen
Chain IDs:B
Chain Length:131
Number of Molecules:1
Biological Source:Simian virus 40

UniProt ID:P03070 Pfam ID:PF02217

Ligand Molecules

Primary Citation

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, Mer, G, Bochkarev, A, Gupta, R, Bochkareva, E, Frappier, L, Ingles, C.M, Edwards, A.M, Chazin, W.J, Luo, X, Sanford, D.G, Bullock, P.A, Bachovchin, W.W.Show

Nat.Struct.Mol.Biol. 12 332 339 (2005)

PMID: 15793585 DOI: 10.1038/nsmb916

Abstact

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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Primary Citation of related structures