Structure-based calculations of the optical spectra of the light-harvesting peridinin-chlorophyll-protein complexes from Amphidinium carterae and Heterocapsa pygmaea
Article Abstract:
Research was conducted to examine quantitatively the spectroscopic characteristics of the peridinin-chlorophyll-protein from Amphidinium carterae (A-PCP) using the three-dimensional structure of A-PCP obtained from X-ray crystallography. A suitable simple model of excited-state energy coupling among the single set of eight peridinin and two chlorophyll molecules belonging to the monomeric unit of the protein trimer was also used. It appears that the absorption and CD spectra of both Heterocapsa pygmaea PCP and A-PCP are understood in terms of interactions among the eight peridinin and two chlorophyll a molecules grouped in two symmetrically related clusters of four peridinins and one chlorophyll.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Carotenoid triplet states associated with the long-wavelength-emitting chlorophyll forms of photosystem I in isolated thylakoids membranes
Article Abstract:
The carotenoid triplet populations associated with the long-wavelength-emitting chlorophyll forms of photosystem I(PS I) was investigated in isolated spinach thylakoids by means of fluorescence-detected magnetic resonance in zero field. On the basis of the triplet-associated fluorescence emission profile, it is suggested that those triplets are associated with light-harvesting complex I, the peripheral antenna complex of Ps I.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Pie-pie stacking interactions in the peridinin-chlorophyll-protein of amphidinium carterae
Article Abstract:
The stacking reactions of the carotenoid molecule peridinins and their aromatic groups are reported. Carotenoids play a pivotal role in photosynthesis, photoprotection and structural stabilization.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
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