Phycobilisome linker domain (IPR001297)

Short name: PBS_linker_dom

Overlapping homologous superfamilies

Domain relationships



Phycobilisomes (PBSs) are the major light-harvesting systems in cyanobacteria and red algae. PBS is a supercomplex that is composed of a core complex and multiple peripheral rod complexes. Typically, the core consists of two or five cylinders lying on the membrane with, in most cases, multiple rods radiating from the core to form a hemidiscoidal structure. The building units of the core cylinders and the peripheral rods are trimeric and hexameric discs, in which a monomer consists of a pair of related phycobiliproteins (PBPs), such as phycorerythrins, phycoerythrocyanins, phycocyanins, and allophycocyanins. The discs are connected to each other via specific linker polypeptides to form peripheral rods or core cylinders. Linker polypeptides share a conserved domain of ~180 residues, which can be present in one or multiple copies [PMID: 2107546, PMID: 1743523, PMID: 15922288, PMID: 17310305, PMID: 17468217].

GO terms

Biological Process

GO:0015979 photosynthesis

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0030089 phycobilisome

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
PROSITE profiles