The γ³³ subunit of R-phycoerythrin from Gracilaria chilensis has a typical double linked phycourobilin similar to β subunit.

ABSTRACT: Phycobilisomes (PBS) are accessory light harvesting protein complexes formed mainly by phycobiliproteins (PBPs). The PBPs absorb light that is efficiently transferred to Photosystems due to chromophores covalently bound to specific cysteine residues. Besides phycobiliproteins (PE), the PBS contains linker proteins responsible for assembly and stabilization of the whole complex and the tuning of energy transfer steps between chromophores. The linker (γ33) from Gracilaria chilensis, is a chromophorylated rod linker associated to (αβ)6 hexamers of R-phycoerythrin (R-PE). Its role in the energy transfer process is not clear yet. Structural studies as well as the composition and location of the chromophores are essential to understand their involvement in the energy transfer process in PBS. To

SUBMITTER: Vasquez-Suarez A 

PROVIDER: S-EPMC5892909 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature