Binding Site

Phytochrome chromophore binding site (IPR013516)

Short name: Phyto_chromo_BS


Phytochrome [PMID: 1812812, PMID: 9230690] 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.

GO terms

Biological Process

GO:0018298 protein-chromophore linkage

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
PROSITE patterns