{PDOC51445}
{PS51445; PBS_LINKER}
{BEGIN}
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* Phycobilisome (PBS) linker domain profile *
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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.

-Sequences known to belong to this class detected by the profile: ALL.
-Other sequence(s) detected in Swiss-Prot: NONE.
-Last update: April 2009 / First entry.

[ 1] Houmard J., Capuano V., Colombano M.V., Coursin T.,
     Tandeau de Marsac N.
     "Molecular characterization of the terminal energy acceptor of
     cyanobacterial phycobilisomes."
     Proc. Natl. Acad. Sci. U.S.A. 87:2152-2156(1990).
     PubMed=2107546
[ 2] Bryant D.A., Stirewalt V.L., Glauser M., Frank G., Sidler W.,
     Zuber H.
     "A small multigene family encodes the rod-core linker polypeptides of
     Anabaena sp. PCC7120 phycobilisomes."
     Gene 107:91-99(1991).
     PubMed=1743523
[ 3] Liu L.-N., Chen X.-L., Zhang Y.-Z., Zhou B.-C.
     "Characterization, structure and function of linker polypeptides in
     phycobilisomes of cyanobacteria and red algae: an overview."
     Biochim. Biophys. Acta 1708:133-142(2005).
     PubMed=15922288; DOI=10.1016/j.bbabio.2005.04.001
[ 4] Krogmann D.W., Perez-Gomez B., Gutierrez-Cirlos E.B.,
     Chagolla-Lopez A., Gonzalez de la Vara L., Gomez-Lojero C.
     "The presence of multidomain linkers determines the bundle-shape
     structure of the phycobilisome of the cyanobacterium Gloeobacter
     violaceus PCC 7421."
     Photosyn. Res. 93:27-43(2007).
     PubMed=17310305; DOI=10.1007/s11120-007-9133-9
[ 5] Kondo K., Ochiai Y., Katayama M., Ikeuchi M.
     "The membrane-associated CpcG2-phycobilisome in Synechocystis: a new
     photosystem I antenna."
     Plant Physiol. 144:1200-1210(2007).
     PubMed=17468217; DOI=10.1104/pp.107.099267

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