Phycoerythrin

Phycoerythrin, alpha/beta chain
Identifiers
SymbolPhycoerythr_ab
PfamPF02972
InterProIPR004228
SCOP21qgw / SCOPe / SUPFAM
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary

Phycoerythrin (PE) is a red protein-pigment complex from the light-harvesting phycobiliprotein family, present in cyanobacteria,[1] red algae[2] and cryptophytes,[3] accessory to the main chlorophyll pigments responsible for photosynthesis.The red pigment is due to the prosthetic group, phycoerythrobilin, which gives phycoerythrin its red color.[4]

Like all phycobiliproteins, it is composed of a protein part covalently binding chromophores called phycobilins. In the phycoerythrin family, the most known phycobilins are: phycoerythrobilin, the typical phycoerythrin acceptor chromophore. Phycoerythrobilin is a linear tetrapyrrole molecule found in cyanobacteria, red algae, and cryptomonads. Together with other bilins such as phycocyanobilin it serves as a light-harvesting pigment in the photosynthetic light-harvesting structures of cyanobacteria called phycobilisomes.[5] Phycoerythrins are composed of (αβ) monomers, usually organised in a disk-shaped trimer (αβ)3 or hexamer (αβ)6 (second one is the functional unit of the antenna rods). These typical complexes also contain a third type of subunit, the γ chain.[2]

  1. ^ Basheva D, Moten D, Stoyanov P, Belkinova D, Mladenov R, Teneva I (November 2018). "Content of phycoerythrin, phycocyanin, alophycocyanin and phycoerythrocyanin in some cyanobacterial strains: Applications". Engineering in Life Sciences. 18 (11): 861–866. Bibcode:2018EngLS..18..861B. doi:10.1002/elsc.201800035. PMC 6999198. PMID 32624879.
  2. ^ a b Cite error: The named reference Ficner93 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference WeijDeWit06 was invoked but never defined (see the help page).
  4. ^ Hine, Robert; Martin, Elizabeth, eds. (2015). "Phycoerythrin". A Dictionary of Biology. Oxford University Press. doi:10.1093/acref/9780198714378.001.0001. ISBN 978-0-19-871437-8. Retrieved 2021-11-27 – via login.aurarialibrary.idm.oclc.org.
  5. ^ Dammeyer T, Frankenberg-Dinkel N (September 2006). "Insights into phycoerythrobilin biosynthesis point toward metabolic channeling". The Journal of Biological Chemistry. 281 (37): 27081–27089. doi:10.1074/jbc.M605154200. PMID 16857683.