Structure of the bifunctional cryptochrome aCRY from Chlamydomonas reinhardtii
Journal
Nucleic Acids Research
Journal Volume
46
Journal Issue
15
Pages
8010-8022
Date Issued
2018
Author(s)
Franz S
Ignatz E
Wenzel S
Zielosko H
Ngurah Putu E.P.G
Tsai M.-D
Yamamoto J
Mittag M
Essen L.-O.
Abstract
Photolyases and cryptochromes form an almost ubiquitous family of blue light photoreceptors involved in the repair and maintenance of DNA integrity or regulatory control. We found that one cryptochrome from the green alga Chlamydomonas reinhardtii (CraCRY) is capable of both, control of transcript levels and the sexual cycle of the alga in a positive (germination) and negative manner (mating ability), as well as catalyzing the repair of UV-DNA lesions. Its 1.6 Å crystal structure shows besides the FAD chromophore an aromatic tetrad that is indispensable in animal-like type I cryptochromes for light-driven change of their signaling-active redox state and formation of a stable radical pair. Given CraCRY's catalytic activity as (6-4) photolyase in vivo and in vitro, we present the first co-crystal structure of a cryptochrome with duplex DNA comprising a (6-4) pyrimidine-pyrimidone lesion. This 2.9 Å structure reveals a distinct conformation for the catalytic histidine His1, H357, that challenges previous models of a single-photon driven (6-4) photolyase mechanism. © The Author(s) 2018. Published by Oxford University Press on behalf of Nucleic Acids Research.
Other Subjects
cryptochrome; deoxyribodipyrimidine photolyase; double stranded DNA; histidine; pyrimidine dimer; cryptochrome; deoxyribodipyrimidine photolyase; amino terminal sequence; Article; binding affinity; binding site; carboxy terminal sequence; catalysis; Chlamydomonas reinhardtii; controlled study; crystal structure; crystallization; deprotonation; DNA repair; enzyme active site; germination; hydrogen bond; in vitro study; in vivo study; mating; molecular interaction; nonhuman; oxidation reduction state; photoactivation; priority journal; protein conformation; protein expression; protein structure; sequence alignment; structure activity relation; structure analysis; amino acid sequence; Chlamydomonas reinhardtii; conformation; genetics; metabolism; molecular model; oxidation reduction reaction; physiology; signal transduction; X ray crystallography; Amino Acid Sequence; Chlamydomonas reinhardtii; Cryptochromes; Crystallography, X-Ray; Deoxyribodipyrimidine Photo-Lyase; DNA Repair; Models, Molecular; Molecular Conformation; Oxidation-Reduction; Sequence Alignment; Signal Transduction
Type
journal article