Replication of N2,3-Ethenoguanine by DNA PolymerasesReplication of N2,3-Ethenoguanine by DNA Polymerases

Structural highlights

3v6h is a 6 chain structure with sequence from Sulso. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:, ,
NonStd Res:,
Gene:dbh, dpo4, SSO2448 (SULSO)
Activity:DNA-directed DNA polymerase, with EC number 2.7.7.7
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[DPO4_SULSO] Poorly processive, error-prone DNA polymerase involved in untargeted mutagenesis. Copies undamaged DNA at stalled replication forks, which arise in vivo from mismatched or misaligned primer ends. These misaligned primers can be extended by PolIV. Exhibits no 3'-5' exonuclease (proofreading) activity. It is involved in translesional synthesis.[HAMAP-Rule:MF_01113]

Publication Abstract from PubMed

Damaged goods: The unstable DNA adduct N(2) ,3-ethenoguanine, a product of both exposure to the carcinogen vinyl chloride and of oxidative stress, was built into an oligonucleotide, using an isostere strategy to stabilize the glycosidic bond. This modification was then used to examine the cause of mutations by DNA polymerases, in terms of both the biochemistry of the lesion and a structure of the lesion within a polymerase.

Replication of N(2) ,3-Ethenoguanine by DNA Polymerases.,Zhao L, Christov PP, Kozekov ID, Pence MG, Pallan PS, Rizzo CJ, Egli M, Guengerich FP Angew Chem Int Ed Engl. 2012 Apr 4. doi: 10.1002/anie.201109004. PMID:22488769[1]

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

See Also

References

  1. Zhao L, Christov PP, Kozekov ID, Pence MG, Pallan PS, Rizzo CJ, Egli M, Guengerich FP. Replication of N(2) ,3-Ethenoguanine by DNA Polymerases. Angew Chem Int Ed Engl. 2012 Apr 4. doi: 10.1002/anie.201109004. PMID:22488769 doi:10.1002/anie.201109004

3v6h, resolution 2.30Å

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