NCBI Accession #
NP_001318964.1
NCBI GenBank Nucleotide #
NM_001331836.1
NCBI Official Full Name
phytochrome interacting factor 3
NCBI Official Symbol
PIF3
NCBI Official Synonym Symbols
F14J9.19; F14J9_19; PAP3; PHOTOCURRENT 1; phytochrome interacting factor 3; PHYTOCHROME INTERACTING FACTOR 3; PHYTOCHROME-ASSOCIATED PROTEIN 3; POC1; purple acid phosphatase 3
NCBI Protein Information
phytochrome interacting factor 3
NCBI Summary
Transcription factor interacting with photoreceptors phyA and phyB. Forms a ternary complex in vitro with G-box element of the promoters of LHY, CCA1. Acts as a negative regulator of phyB signalling. It degrades rapidly after irradiation of dark grown seedlings in a process controlled by phytochromes. Does not play a significant role in controlling light input and function of the circadian clockwork. Binds to G- and E-boxes, but not to other ACEs. Binds to anthocyanin biosynthetic genes in a light- and HY5-independent fashion. PIF3 function as a transcriptional activator can be functionally and mechanistically separated from its role in repression of PhyB mediated processes.
UniProt Synonym Gene Names
BHLH8; EN100; PAP3; AtbHLH8; bHLH 8
UniProt Protein Name
Transcription factor PIF3
UniProt Synonym Protein Names
Basic helix-loop-helix protein 8; AtbHLH8; bHLH 8; Phytochrome-associated protein 3; Phytochrome-interacting factor 3; Transcription factor EN 100; bHLH transcription factor bHLH008
UniProt Primary Accession #
O80536
UniProt Secondary Accession #
A5Y7A2; A5Y7A3; A5Y7A4; A5Y7A5; A5Y7A6; A5Y7A7; A5Y7A8; A5Y7A9; A5Y7B0; A5Y7B1; A5Y7B2
UniProt Related Accession #
O80536
UniProt Comments
Transcription factor acting positively in the phytochrome signaling pathway. Activates transcription by binding to the G box (5'-CACGTG-3').