Member database | PROSITE profiles |
PROSITE profiles type | domain |
Short name | PHYTOCHROME_2 |
Description
Phytochrome
[1][2] is a plant protein that acts as a regulatory photoreceptor
and which mediates red-light effects on a wide variety of physiological and
molecular responses. Phytochrome can undergo a reversible photochemical
conversion between a biologically inactive red light-absorbing form and the
active far-red light-absorbing form. Phytochrome is a dimer of identical 124
Kd subunits, each of which contains a covalently attached linear tetrapyrrole
chromophore.
The chromophore is attached to a cysteine which is located in a highly
conserved region that can be used as a signature pattern.
Synechocystis strain PCC 6803 hypothetical protein slr0473 contains a domain
similar to that of plants phytochrome and seems to also bind a chromophore.
References
1.Phytochrome: a light-activated molecular switch that regulates plant gene expression. Quail PH. Annu. Rev. Genet. 25, 389-409, (1991). View articlePMID: 1812812
2.The phytochromes: a biochemical mechanism of signaling in sight? Quail PH. Bioessays 19, 571-9, (1997). View articlePMID: 9230690