PS50046

Phytochrome chromophore attachment site domain profile

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Short namePHYTOCHROME_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

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