Replication protein E1

spinqualitylabelsall models Bovine papillomavirus 1 replication protein E1 complex with DNA (PDB code 1ksx) Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Function Replication protein E1 (RPE1) is a human papillomavirus (HPV) essential protein which is required for its replication. RPE1 recognizes the HPV origin of replication (ori) with the aid of regulatory protein E2 (RPE2). The resultant helicase complex initiates DNA unwinding to provide the template of progeny DNA synthesis, The HPV ori contains one RPE1 binding site and 2 RPE2 binding sites. RPE1 is found also in bovine papillomavirus (BPV). Disease RPE1 has been shown to mitigate host cell defenses leading to the development of cancer induces apoptosis of its host cells. Relevance The detection of RPE1 mRNA and promoter methylation may serve as cancer prognostic marker. Structural highlights The complex between BPV1 DBD and 21-bp DNA (PDB code 1ksx) shows 2 DBD-DNA binding modules: a binding loop and a binding helix each interacting with a single strand. The protein-DNA interactions are hydrophilic to phosphate atoms and van der Waals hydrophobic ones.

3D structures of replication protein E1

Updated on 03-February-2021

Domains: helicase 301-605; DNA-binding (DBD) 286-365

1ksx - RPE1 DBD - HPV18
1tue - RPE1 428-631 (mutant) + RPE2 TAD
2v9p - RPE1 helicase domain - BPV1
5a9k - RPE1 helicase domain - Cryo EM
2gxa - RPE1 helicase domain + DNA + ADP
1f08 - RPE1 DBD
1ksx, 1ksy - RPE1 DBD + DNA

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Michal Harel, Alexander Berchansky