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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 447 - 452 (6page)
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Many organisms use proton pump to earn energy for living. Some proton pumps start to work by light and one of the famous proteins are called proteorhodopsin (PR). From recent study it used not only protons but also mono-valent cations, divalent cations, or mono-valent anions during pumping activity. The goal of this study is to find new types of proton pumping proteins in the surface of the ocean. Metagenome samples were collected from the beach in Taean-gun and Incheon (Kkotji beach (36 300000N, 126 1905600E), Kkotji mud (36 300800N, 126 1906000E), Duegi beach (36 310600N, 126 1903900E), Sorae salt pond (37 2402500N, 126 4404100E), swamp (37 2405900N, 126 4405400E) and reservoir (37 2403900N, 126 450500E) in West Sea of Korea. Genomic DNA of each sample was isolated and used for PCR with specific primers for PR and sodium pumping rhodopsin. As a result, we obtained an unidentified PR in Duegi beach sample. The unidentified PR was expressed with chimeric expression system. It has 528 nm absorption maximum at pH 7. By the light differential spectrum measurement, putative M and O photo-intermediates were detected at around 400 and 600 nm, respectively. Similar to GPR, it has light driven outward proton transfer activity.
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참고문헌 (20)
참고문헌 신청
Beja O / 2000 / Bacterial rhodopsin: evidence for a new type of phototrophy in the sea / Science 289:1902~1906
Beja O / 2001 / Proteorhodopsin phototrophy in the ocean / Nature 411:786~789
Choi AR / 2013 / Characterization of the chimeric seven-transmembrane protein containing conserved region of helix C-F of microbial rhodopsin from Ganges River / Appl Microbiol Biotechnol 97:819~828
de la Torre JR / 2003 / Proteorhodopsin genes are distributed among divergent marine bacterial taxa / Proc Natl Acad Sci U S A 100:12830~12835
Dioumaev AK / 2002 / Proton transfers in the photochemical reaction cycle of proteorhodopsin / Biochemistry 41:5348~5358
Beja O / 2001 / Proteorhodopsin phototrophy in the ocean / Nature 411:786~789
Choi AR / 2013 / Characterization of the chimeric seven-transmembrane protein containing conserved region of helix C-F of microbial rhodopsin from Ganges River / Appl Microbiol Biotechnol 97:819~828
de la Torre JR / 2003 / Proteorhodopsin genes are distributed among divergent marine bacterial taxa / Proc Natl Acad Sci U S A 100:12830~12835
Dioumaev AK / 2002 / Proton transfers in the photochemical reaction cycle of proteorhodopsin / Biochemistry 41:5348~5358
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