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Titolo:
Raman spectroscopic study of space structure of membrane proteins and membrane-lipids in photodamaged human erythrocyte sensitized by hypocrellin B
Autore:
Xu, YM; Yang, HY; Zhang, ZY;
Indirizzi:
Chinese Acad Sci, Inst Biophys, Beijing 100101, Peoples R China Chinese Acad Sci Beijing Peoples R China 100101 100101, Peoples R China
Titolo Testata:
SCIENCE IN CHINA SERIES C-LIFE SCIENCES
fascicolo: 6, volume: 41, anno: 1998,
pagine: 608 - 616
SICI:
1006-9305(199812)41:6<608:RSSOSS>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOSENSITIZATION;
Keywords:
Hypocrellin B; human erythrocyte membranes; space structure; photosensitive damage; Raman spectroscopic characteristics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Xu, YM Chinese Acad Sci, Inst Biophys, Beijing 100101, Peoples R China Chinese Acad Sci Beijing Peoples R China 100101 , Peoples R China
Citazione:
Y.M. Xu et al., "Raman spectroscopic study of space structure of membrane proteins and membrane-lipids in photodamaged human erythrocyte sensitized by hypocrellin B", SCI CHINA C, 41(6), 1998, pp. 608-616

Abstract

Laser Raman spectroscopy was used to investigate the photodamage characteristics of human erythrocyte membranes sensitized by hypocrellin B (HB) at the molecular level. It brought to light that the essence of the changes of erythrocyte membranes' functions caused by membrane protein cross-linking and membrane lipid peroxidation, including increase of fluidity and ion permeability of membranes, etc., was that the orderly structure of erythrocyte membranes had been damaged by the active oxygen (O-1(2), O-2(.-) and (OH)-O-.) generated by HB, including the decrease of alpha-helix, beta-sheet and the increase of random coil in the main-chain of membrane proteins, the decrease of mercapto groups, indole rings, p-hydroxy phenyl rings, monosubstituted phenyl rings, etc, in the side-chain, and the changes of the conformations of membrane lipids as well. With the increase of the irradiation time,the trans conformation of membrane lipids increased first, then decreased. On the contrary, the gauche conformation decreased first, then increased. In addition, the decrease of the intensities of the lines assigned to bending vibration of the conformation-insensitive CH2 and CH3 of membrane proteins and lipids suggested that break of their chains had occurred.

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Documento generato il 08/04/20 alle ore 11:52:49