PROSITE documentation PDOC51445
Phycobilisome (PBS) linker domain profile


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 [1,5].

The profile we developed covers the entire PBS linker domain.

Last update:

April 2009 / First entry.


Technical section

PROSITE method (with tools and information) covered by this documentation:

PBS_LINKER, PS51445; Phycobilisome (PBS) linker domain profile  (MATRIX)


1AuthorsHoumard J. Capuano V. Colombano M.V. Coursin T. Tandeau de Marsac N.
TitleMolecular characterization of the terminal energy acceptor of cyanobacterial phycobilisomes.
SourceProc. Natl. Acad. Sci. U.S.A. 87:2152-2156(1990).
PubMed ID2107546

2AuthorsBryant D.A. Stirewalt V.L. Glauser M. Frank G. Sidler W. Zuber H.
TitleA small multigene family encodes the rod-core linker polypeptides of Anabaena sp. PCC7120 phycobilisomes.
SourceGene 107:91-99(1991).
PubMed ID1743523

3AuthorsLiu L.-N. Chen X.-L. Zhang Y.-Z. Zhou B.-C.
TitleCharacterization, structure and function of linker polypeptides in phycobilisomes of cyanobacteria and red algae: an overview.
SourceBiochim. Biophys. Acta 1708:133-142(2005).
PubMed ID15922288

4AuthorsKrogmann D.W. Perez-Gomez B. Gutierrez-Cirlos E.B. Chagolla-Lopez A. Gonzalez de la Vara L. Gomez-Lojero C.
TitleThe presence of multidomain linkers determines the bundle-shape structure of the phycobilisome of the cyanobacterium Gloeobacter violaceus PCC 7421.
SourcePhotosyn. Res. 93:27-43(2007).
PubMed ID17310305

5AuthorsKondo K. Ochiai Y. Katayama M. Ikeuchi M.
TitleThe membrane-associated CpcG2-phycobilisome in Synechocystis: a new photosystem I antenna.
SourcePlant Physiol. 144:1200-1210(2007).
PubMed ID17468217

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