Global InformationYcf9 protein domain information
| Ycf9 protein domain | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Crystal structure of Photosystem II from thermosynechococcus elongatus | |||||||||
| Identifiers | |||||||||
| Symbol | Ycf9 | ||||||||
| Pfam | PF01737 | ||||||||
| InterPro | IPR002644 | ||||||||
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In molecular biology, the PsbZ (Ycf9) is a protein domain, which is low in molecular weight. It is a transmembrane protein and therefore is located in the thylakoid membrane of chloroplasts in cyanobacteria and plants. More specifically, it is located in Photosystem II (PSII) and in the light-harvesting complex II (LHCII). Ycf9 acts as a structural linker, that stabilises the PSII-LHCII supercomplexes. Moreover, the supercomplex fails to form in PsbZ-deficient mutants, providing further evidence to suggest Ycf9's role as a structural linker. This may be caused by a marked decrease in two LHCII antenna proteins, CP26 and CP29, found in PsbZ-deficient mutants, which result in structural changes, as well as functional modifications in PSII.[1]
Ycf is an acronym originally standing for hypothetical chloroplast open reading frame.
- ^ Swiatek M, Kuras R, Sokolenko A, Higgs D, Olive J, Cinque G, Müller B, Eichacker LA, Stern DB, Bassi R, Herrmann RG, Wollman FA (June 2001). "The chloroplast gene ycf9 encodes a photosystem II (PSII) core subunit, PsbZ, that participates in PSII supramolecular architecture". Plant Cell. 13 (6): 1347–67. doi:10.2307/3871300. JSTOR 3871300. PMC 135574. PMID 11402165.