FEATURES

FAMILY

DESCRIPTION

Also known as PHCA_GALSU, cpcA. Light-harvesting photosynthetic tetrapyrrole chromophore-protein from the phycobiliprotein complex (phycobilisome, PBS). Phycocyanin is the major phycobiliprotein in the PBS rod. Heterodimer of an alpha and a beta subunit (Ref.1, PubMed:468790, PubMed:10354419). Dimers further assemble into trimers and the trimers into hexamers. The basic functional unit of phycobiliproteins is a ring-shaped hexamer formed from two back-to-back trimers contacting via the alpha chain subunits. The trimers are composed of alpha/beta subunit heterodimers arranged around a three-fold axis of symmetry. The phycoerythrins also contain a gamma subunit which is located in the center of the hexamer (PubMed:10354419).

EXTERNAL LINKS

cpcA

Structural Ligandability

Domains Chains

Distribution