UniProt:Q9FDX8 HD1

chain
  • chain:1-395
checksum F0A00E46DFFE1F0D
comment
  • FUNCTION Probable transcription factor involved in the regulation of flower development. Required for the promotion of flowering under short day (SD) conditions and the suppression of flowering under long day (LD) conditions. Positively regulates the floral activator HEADING DATE 3a (HD3A) under SD and negatively under LD conditions.SUBUNIT Interacts with HAL3 in the dark.SUBCELLULAR LOCATION Expressed with a circadian rhythm showing a peak at night and then decreasing to reach the lowest levels around the middle of the day in LD conditions. The levels of expression in SD conditions are slightly lower.PTM Phosphorylated by OSK4 in the presence of HDR1.POLYMORPHISM The cultivar Taichung 65 exhibits a long basic vegetative growth and reduced response to photoperiod due to loss-of-function alleles of HD1 and EHD1. This confers almost constant and sufficient vegetative growth periods even in low latitudes where short photoperiod conditions continue almost throughout the year.MISCELLANEOUS The GIGANTEA-CONSTANS-FLOWER LOCUS T (GI-CO-FT) pathway to control photoperiodic flowering under LD is conserved between Arabidopsis and rice, but the regulation of the downstream gene by the upstream regulatory gene is reversed in the two species. In Arabidopsis, GI acts as an activator of CO, which in turn activates the floral activator FT under LD conditions. In rice, GI activates HD1/CO in a similar manner to that in Arabidopsis. However, under LD conditions, HD1 suppresses HD3A/FT expression, causing the suppression of flowering.SIMILARITY Belongs to the CONSTANS family.
created [InstanceEdit:8934132] Jaiswal, Pankaj, 2016-08-08
databaseName UniProt
dbId 8934162
description
  • recommendedName: fullName evidence="7"Zinc finger protein HD1 alternativeName: fullName evidence="10"Protein CONSTANS-like alternativeName: fullName evidence="7"Protein HEADING DATE 1 shortName evidence="7"OsHd1 alternativeName: fullName evidence="8"Protein PHOTOPERIOD SENSITIVITY 1
displayName UniProt:Q9FDX8 HD1
geneName
  • HD1
  • SE1
  • Os06g0275000
  • LOC_Os06g16370
  • P0038C05.23
  • P0676F10.34
identifier Q9FDX8
isSequenceChanged false
keyword
  • 3D-structure
  • Developmental protein
  • Differentiation
  • DNA-binding
  • Flowering
  • Metal-binding
  • Nucleus
  • Phosphoprotein
  • Reference proteome
  • Repeat
  • Transcription
  • Transcription regulation
  • Zinc
  • Zinc-finger
modified [InstanceEdit:9862192] Weiser, Joel, 2024-02-26
name
  • HD1
referenceDatabase [ReferenceDatabase:2] UniProt
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • HD1_ORYSJ
  • Q8H2H0
sequenceLength 395
species [Species:1250427] Oryza sativa subsp. japonica
url http://purl.uniprot.org/uniprot/Q9FDX8