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Spectroscopic and photochemical analysis of proteorhodopsin variants from the surface of the Arctic Ocean

Cited 15 time in scopus
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Title
Spectroscopic and photochemical analysis of proteorhodopsin variants from the surface of the Arctic Ocean
Other Titles
북극 해양에서 분리된 프로테오로돕신의 광화학적 특성 분석
Authors
Jung, Kwang-Hwan
Choi, Ah Reum
Lee, Hong Kum
Lee, Yoo Kyung
Jung, Jae Yong
Subject
Biochemistry & Molecular Biology; Biophysics; Cell Biology
Keywords
Arctic Ocean; Y200N variants; photocycling rate; proteorhodopsin; proton pumping
Issue Date
2008
Publisher
Elsevier (2008 Federation of European Biochemical Societies)
Citation
Jung, Kwang-Hwan, et al. 2008. "Spectroscopic and photochemical analysis of proteorhodopsin variants from the surface of the Arctic Ocean". FEBS Letters, 582(12): 1679-1684.
Abstract
Proteorhodopsin (PR), a retinal-containing seven transmembrane protein that functions as a light-driven proton pump, was discovered in the genome of marine bacteria. Eighteen PRs were isolated using PCR from the surface of the Arctic Ocean. Interestingly, there are several isolates in which the retinal binding site member Tyr200 (in MBP) is replaced with Asn. They show a slow photocycle and more blue shifted absorption maxima than GPR at pH 10. Y200N variant shows larger ?H than in GPR, and we suggest that they have been adapted to environmental temperature changes by modulating its photocycling rate.
URI
http://repository.kopri.re.kr/handle/201206/6257
DOI
http://dx.doi.org/10.1016/j.febslet.2008.04.025
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