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.

Analysis, Plant proteins, Dinoflagellates, Photoabsorption

---

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.

Fluorescence, Magnetic resonance

---

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.

Carotenoids, Chemical reactions

Similar abstracts:

• Abstracts: Structure and vibrational spectra of the zwitterion L-alanine in the presence of explicit water molecules: a density functional analysis
• Abstracts: Infrared reflection adsorption spectroscopic study on the rotational isomerism of methyl propyl ether on Cu(110) and Ag(110)
• Abstracts: Encapsulation of electron donor-acceptor dyads in [beta]-cyclodextrin cavity: unusual planarization and enhancement in rate of electron-transfer reaction
• Abstracts: Comparative theoretical study of formaldehyde decomposition of PdZn, Cu, and Pd surfaces. Reply to "comment on 'combined in situ and infrared kinetic study of the catalytic CO + NO reaction on Pd(111) at pressures up to 240 mbar'"
• Abstracts: Theoretical treatment of scan time dependent optical bands of single molecule embedded in polymer or glass. Free volume concept in application to folding kinectics of random heteropolymers

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.