(593t) Characterization of Photosynthetic Proteins in Marine Algae
AIChE Annual Meeting
2012
2012 AIChE Annual Meeting
Food, Pharmaceutical & Bioengineering Division
Bioengineering Poster Session
Wednesday, October 31, 2012 - 6:00pm to 8:00pm
The water-soluble peridinin-chlorophyll a-protein (PCP) and the membrane bound intrinsic light-harvesting complex (acpPC) are major light harvesting complexes in photosynthetic dinoflagellates, which are a group of marine algae. PCP contains the carotenoid peridinin and chlorophyll a, while acpPC contains an additional pigment chlorophyll c2. In this study, we identified and characterized the PCP and acpPC proteins in Symbiodinium sp. CS-156. The apoPCP has a molecular mass of 32.7 kDa. Despite the heterogeneity of PCP gene tandem repeats, we identified a single form of PCP, which was sequenced by LC-MS/MS analysis of tryptic digested PCP. Protein sequence comparison with the Amphidinium main form PCP (MFPCP) shows that the chl a and peridinin binding pockets are conserved in these two genera, which indicates the high degree of spectroscopic similarity and the same pigment stoichiometry; these hypotheses were confirmed by experiments. The spectroscopic characterization revealed that the peridinin-to-Chl a Qy energy transfer efficiency is 95 % in this complex, which suggests that PCP may be promising for use in solar energy capture and eventual biofuel production in engineered devices.
See more of this Session: Bioengineering Poster Session
See more of this Group/Topical: Food, Pharmaceutical & Bioengineering Division - See also TI: Comprehensive Quality by Design in Pharmaceutical Development and Manufacture
See more of this Group/Topical: Food, Pharmaceutical & Bioengineering Division - See also TI: Comprehensive Quality by Design in Pharmaceutical Development and Manufacture