Photosystem II light harvesting protein
- Photosystem II light harvesting protein
Pfam_box
Symbol = PSII
Name = Photosystem II protein
width =
caption =
Pfam= PF00421
InterPro= IPR000932
SMART=
Prosite =
SCOP =
TCDB = 3.E.2
OPM family= 2
OPM protein= 2axt
PDB=PDB3|1s5lb:1-501 PDB3|2axtB:1-501
Photosystem II light-harvesting proteins are the intrinsic transmembrane antenna proteins CP43 (PsbC) and CP47 (PsbB) found in the reaction centre of PSII. These polypeptides bind to chlorophyll a and beta-carotene and pass the excitation energy on to the reaction centrecite journal |author=Barber J |title=Photosystem II: a multisubunit membrane protein that oxidiseswater |journal=Curr. Opin. Struct. Biol. |volume=12 |issue=4 |pages=523–530 |year=2002 |pmid=12163077 |doi=10.1016/S0959-440X(02)00357-3] . This family also includes the iron-stress induced chlorophyll-binding protein CP43 (IsiA), which evolved in cyanobacteria from aPSII protein to cope with light limitations and stress conditions. Under iron-deficient growth conditions, CP43 associates with PSI to form a complex that consists of a ring of 18 or more CP43 molecules around a PSI trimer, which significantly increases the light-harvesting system of PSI. IsiA can also provide photoprotection for PSII[cite journal |author=Yeremenko N, Kouril R, Ihalainen JA, D'haene S, Van oosterwijk N, Andrizhiyevskaya EG, Keegstra W, Dekker HL, Hagemann M, Boekema EJ, Matthijs HC, Dekker JP |title=Supramolecular organization and dual function of theIsiA chlorophyll-binding protein in cyanobacteria |journal=Biochemistry |volume=43 |issue=32 |pages=10308–10313 |year=2004 |pmid=15301529 |doi=10.1021/bi048772l] .]ubfamilies
*Photosystem II protein PsbC InterPro|IPR005869
References
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