Orange carotenoid-binding protein

NameOrange carotenoid-binding protein
Synonyms
  • OCP
Gene NameNone
OrganismArthrospira maxima
Amino acid sequence
>lcl|BSEQ0011995|Orange carotenoid-binding protein
MPFTIDTARSIFPETLAADVVPATIARFKQLSAEDQLALIWFAYLEMGKTITIAAPGAAN
MQFAENTLQEIRQMTPLQQTQAMCDLANRTDTPICRTYASWSPNIKLGFWYELGRFMDQG
LVAPIPEGYKLSANANAILVTIQGIDPGQQITVLRNCVVDMGFDTSKLGSYQRVAEPVVP
PQEMSQRTKVQIEGVTNSTVLQYMDNLNANDFDNLISLFAEDGALQPPFQKPIVGKENTL
RFFREECQNLKLIPERGVSEPTEDGYTQIKVTGKVQTPWFGGNVGMNIAWRFLLNPENKV
FFVAIDLLASPKELLNL
Number of residuesNone
Molecular Weight35347.29
Theoretical pI4.54
GO Classification
Functions
  • photoreceptor activity
  • chloride ion binding
Processes
  • transport
  • protein-chromophore linkage
  • light absorption
Components
  • phycobilisome
General FunctionPhotoreceptor activity
Specific FunctionActs as a blue-light photoreceptor and photo-protectant. Essential for inhibiting damaged induced by excess blue-green light via a process known as non-photochemical quenching (NPQ). Binding carotenoids improves OCP's intrinsic photoprotectant activity by broadening its absorption spectrum and facilitating the dissipation of absorbed energy (PubMed:15751975). In the dark or dim light the stable inactive form (OCP-O) is orange, upon illumination with blue-green light it converts to a metastable active red form (OCP-R), inducing energy dissipation, quenching cellular fluorescence via NPQ (By similarity).
Transmembrane Regions
GenBank Protein ID
UniProtKB IDP83689
UniProtKB Entry Name
Cellular LocationCellular thylakoid membrane
Gene sequence
None
GenBank Gene ID
GeneCard IDNone
GenAtlas ID
HGNC ID
Chromosome LocationNone
LocusNone
References
  1. Wu YP, Krogmann DW: The orange carotenoid protein of Synechocystis PCC 6803. Biochim Biophys Acta. 1997 Nov 10;1322(1):1-7. [9398074 ]
  2. Kerfeld CA: Water-soluble carotenoid proteins of cyanobacteria. Arch Biochem Biophys. 2004 Oct 1;430(1):2-9. [15325905 ]
  3. Polivka T, Kerfeld CA, Pascher T, Sundstrom V: Spectroscopic properties of the carotenoid 3'-hydroxyechinenone in the orange carotenoid protein from the cyanobacterium Arthrospira maxima. Biochemistry. 2005 Mar 15;44(10):3994-4003. [15751975 ]
  4. Kerfeld CA, Wu YP, Chan C, Krogmann DW, Yeates TO: Crystals of the carotenoid protein from Arthrospira maxima containing uniformly oriented pigment molecules. Acta Crystallogr D Biol Crystallogr. 1997 Nov 1;53(Pt 6):720-3. [15299860 ]
  5. Kerfeld CA, Sawaya MR, Brahmandam V, Cascio D, Ho KK, Trevithick-Sutton CC, Krogmann DW, Yeates TO: The crystal structure of a cyanobacterial water-soluble carotenoid binding protein. Structure. 2003 Jan;11(1):55-65. [12517340 ]

From www.t3db.ca