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Specific mutation near the primary donor in photosystem I from Chlamydomonas reinhardtii alters the trapping time and spectroscopic properties of P700.
- A. Melkozernov, H. Su, S. Lin, S. Bingham, A. Webber, R. Blankenship
- Biology, Medicine
- 11 March 1997
The lifetime of the trapping process measured independently by transient absorption and fluorescence spectroscopy in the mutant PSI core antenna is increased by a factor of approximately 2, implying that the trappingprocess in the PSI antenna is limited by the process where the primary donor molecule directly participates. Expand
Site-directed mutations affecting the spectroscopic characteristics and midpoint potential of the primary donor in photosystem I.
Estimation of site-directed mutants of the photosystem I reaction center protein PsaB and an amino acid, His-656, that interacts closely with one of the P700 chlorophylls is identified that increases the oxidation midpoint potential of P700/P700+. Expand
Excitation energy transfer in thylakoid membranes from Chlamydomonas reinhardtii lacking chlorophyll b and with mutant Photosystem I
Energy trapping in Photosystem I (PS I) was studied by time-resolved fluorescence spectroscopy of PS II-deleted Chl b-minus thylakoid membranes isolated from site-directed mutants of Chlamydomonas… Expand
Study on the DME-cytochromeb5 and its mutants at site of F58
Phenylalanine-58 is one of the conservative residues in the hydrophobic pocket of Cytb5, which forms aromatic stacking with the hemeb. Previous study showed that both the stacking and the property of… Expand