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| PROSITE documentation PDOC00464 |
Cytochrome b559 subunits heme-binding site signature
Description
Cytochrome b559 [1] is an essential component of photosystem II complex from oxygenic photosynthetic organisms. It is an integral thylakoid membrane protein composed of two subunits, α (gene psbE) and β (gene psbF), each of which contains a histidine residue located in a transmembrane region. The two histidines coordinate the heme iron of cytochrome b559.
The region around the heme-binding residue of both subunits is very similar and can be used as a signature pattern.
Last update:December 2004 / Pattern and text revised.
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Technical section
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Reference
| 1 | Authors | Pakrasi H.B. De Ciechi P. Whitmarsh J. |
| Title | Site directed mutagenesis of the heme axial ligands of cytochrome b559 affects the stability of the photosystem II complex. | |
| Source | EMBO J. 10:1619-1627(1991). | |
| PubMed ID | 1904816 |
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