STATE OF CAROTENOIDS BOUND TO REACTION CENTERS OF PHOTOSYNTHETIC BACTERIA - RESONANCE RAMAN STUDY
STATE OF CAROTENOIDS BOUND TO REACTION CENTERS OF PHOTOSYNTHETIC BACTERIA - RESONANCE RAMAN STUDY
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DOI：
10.1016/0005-2728(78)90189-5
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发表时间：
1978-01-01
期刊：
影响因子：
--
通讯作者：
REISSHUSSON, F
中科院分区：
文献类型：
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作者：
LUTZ, M;AGALIDIS, I;REISSHUSSON, F
类胡萝卜素结合在球形红假单胞菌野生、Ga和GlC菌株、红红螺旋菌、S1菌株和绿红弧菌的反应中心，产生非常相似的共振拉曼光谱，但不同寻常。通过与15,15”-顺式- β的共振拉曼光谱的比较。-胡萝卜素，这些类胡萝卜素呈顺式构象，而相应的色素团只含有全反式构象。这些顺式构象可能对所有研究的类胡萝卜素都是相同的。它们不受20 -300度温度变化的影响。K和P-870的氧化还原态。它们是不稳定的，当从反应中心提取时，会迅速异构化为全反式。根据它们的电子和振动谱，讨论了这些构象的可能性质。
The carotenoids bound to reaction centers of wild, Ga and GlC strains of Rhodopseudomonas sphaeroides, of Rhodospirillum rubrum, strain S1 and of R. viridis, yield very similar, but unusual resonance Raman spectra. Through a comparison with resonance Raman spectra of 15,15''-cis-.beta.-carotene, these carotenoids assumed cis conformations, while the corresponding chromatophores contain all-trans forms only. These cis conformations likely are identical for all the carotenoids studied. They remain unaffected by variations of temperature from 20.degree.-300.degree. K and by the redox state of P-870. They are unstable, being rapidly isomerized towards the all-trans forms when extracted from the reaction centers. The possible nature of these conformers is discussed on the basis of their electronic and vibrational spectra.