2XRZ image
Entry Detail
PDB ID:
2XRZ
Keywords:
Title:
X-ray structure of archaeal class II CPD photolyase from Methanosarcina mazei in complex with intact CPD-lesion
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2010-09-24
Release Date:
2011-09-14
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.20
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:DEOXYRIBODIPYRIMIDINE PHOTOLYASE
Mutations:YES
Chain IDs:A, B
Chain Length:482
Number of Molecules:2
Biological Source:METHANOSARCINA MAZEI
Polymer Type:polydeoxyribonucleotide
Description:CPD-COMPRISING OLIGONUCLEOTIDE
Chain IDs:C, E
Chain Length:14
Number of Molecules:2
Biological Source:SYNTHETIC CONSTRUCT
Polymer Type:polydeoxyribonucleotide
Description:COUNTERSTRAND-OLIGONUCLEOTIDE
Chain IDs:D, F
Chain Length:14
Number of Molecules:2
Biological Source:SYNTHETIC CONSTRUCT
Primary Citation
Crystal Structures of an Archaeal Class II DNA Photolyase and its Complex with Uv-Damaged Duplex DNA.
Embo J. 30 4437 ? (2011)
PMID: 21892138 DOI: 10.1038/EMBOJ.2011.313

Abstact

Class II photolyases ubiquitously occur in plants, animals, prokaryotes and some viruses. Like the distantly related microbial class I photolyases, these enzymes repair UV-induced cyclobutane pyrimidine dimer (CPD) lesions within duplex DNA using blue/near-UV light. Methanosarcina mazei Mm0852 is a class II photolyase of the archaeal order of Methanosarcinales, and is closely related to plant and metazoan counterparts. Mm0852 catalyses light-driven DNA repair and photoreduction, but in contrast to class I enzymes lacks a high degree of binding discrimination between UV-damaged and intact duplex DNA. We solved crystal structures of Mm0852, the first one for a class II photolyase, alone and in complex with CPD lesion-containing duplex DNA. The lesion-binding mode differs from other photolyases by a larger DNA-binding site, and an unrepaired CPD lesion is found flipped into the active site and recognized by a cluster of five water molecules next to the bound 3'-thymine base. Different from other members of the photolyase-cryptochrome family, class II photolyases appear to utilize an unusual, conserved tryptophane dyad as electron transfer pathway to the catalytic FAD cofactor.

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Primary Citation of related structures