1ksy

From Proteopedia

Crystal Structures of Two Intermediates in the Assembly of the Papillomavirus Replication Initiation Complex

Structural highlights

1ksy is a 6 chain structure with sequence from Bovine papillomavirus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 3.05Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

VE1_BPV1 ATP-dependent DNA helicase required for initiation of viral DNA replication. It forms a complex with the viral E2 protein. The E1-E2 complex binds to the replication origin which contains binding sites for both proteins.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Initiation of DNA replication of the papillomavirus genome is a multi-step process involving the sequential loading of viral E1 protein subunits onto the origin of replication. Here we have captured structural snapshots of two sequential steps in the assembly process. Initially, an E1 dimer binds to adjacent major grooves on one face of the double helix; a second dimer then binds to another face of the helix. Each E1 monomer has two DNA-binding modules: a DNA-binding loop, which binds to one DNA strand and a DNA-binding helix, which binds to the opposite strand. The nature of DNA binding suggests a mechanism for the transition between double- and single-stranded DNA binding that is implicit in the progression to a functional helicase.

Crystal structures of two intermediates in the assembly of the papillomavirus replication initiation complex.,Enemark EJ, Stenlund A, Joshua-Tor L EMBO J. 2002 Mar 15;21(6):1487-96. PMID:11889054^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Enemark EJ, Stenlund A, Joshua-Tor L. Crystal structures of two intermediates in the assembly of the papillomavirus replication initiation complex. EMBO J. 2002 Mar 15;21(6):1487-96. PMID:11889054 doi:http://dx.doi.org/10.1093/emboj/21.6.1487