2XRY

X-ray structure of archaeal class II CPD photolyase from Methanosarcina mazei

Summary for 2XRY

• Entry DOI: 10.2210/pdb2xry/pdb
• Related: 2XRZ
• Descriptor: DEOXYRIBODIPYRIMIDINE PHOTOLYASE, FLAVIN-ADENINE DINUCLEOTIDE, SULFATE ION, ... (5 entities in total)
• Functional Keywords: dna damage, dna repair, lyase
• Biological source: METHANOSARCINA MAZEI
• Total number of polymer chains: 1
• Total formula weight: 56957.79

Authors

Kiontke, S.,Geisselbrecht, Y.,Pokorny, R.,Carell, T.,Batschauer, A.,Essen, L.O. (deposition date: 2010-09-24, release date: 2011-09-14, Last modification date: 2024-05-01)

Primary citation

Kiontke, S.,Geisselbrecht, Y.,Pokorny, R.,Carell, T.,Batschauer, A.,Essen, L.O.
Crystal Structures of an Archaeal Class II DNA Photolyase and its Complex with Uv-Damaged Duplex DNA.
Embo J., 30:4437-, 2011

PubMed Abstract: 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.

PubMed: 21892138
DOI: 10.1038/EMBOJ.2011.313

Experimental method

X-RAY DIFFRACTION (1.5 Å)