PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Oryza meridionalis
HSF Family
Species TF ID Description
OMERI01G18590.1HSF family protein
OMERI01G21410.1HSF family protein
OMERI01G27390.1HSF family protein
OMERI01G28000.1HSF family protein
OMERI02G11000.1HSF family protein
OMERI02G17330.1HSF family protein
OMERI02G18820.1HSF family protein
OMERI03G04420.1HSF family protein
OMERI03G08410.1HSF family protein
OMERI03G08410.2HSF family protein
OMERI03G16640.1HSF family protein
OMERI03G25120.3HSF family protein
OMERI03G25120.4HSF family protein
OMERI03G31070.1HSF family protein
OMERI03G31070.2HSF family protein
OMERI03G31070.3HSF family protein
OMERI03G34490.1HSF family protein
OMERI03G38170.1HSF family protein
OMERI04G18580.1HSF family protein
OMERI05G21150.1HSF family protein
OMERI06G18730.1HSF family protein
OMERI06G19110.1HSF family protein
OMERI07G03500.1HSF family protein
OMERI07G20240.3HSF family protein
OMERI08G17470.1HSF family protein
OMERI09G10050.1HSF family protein
OMERI09G10160.1HSF family protein
OMERI09G12670.1HSF family protein
OMERI10G07540.1HSF family protein
OMERI10G07540.2HSF family protein
OMERI10G07540.3HSF family protein
HSF Family Introduction

Heat stress transcription factors (Hsfs) are the major regulators of the plant heat stress (hs) response. Sequencing of the Arabidopsis genome revealed the existence of 21 open-reading frames (ORFs) encoding putative Hsfs assigned to classes A-C. Here we present results of a functional genomics approach to the Arabidopsis Hsf family focused on the analysis of their C-terminal domains (CTDs) harboring conserved modules for their function as transcription factors and their intracellular localization. Using reporter assays in tobacco protoplasts and yeast as well as glutathione-S-transferase (GST) pull-down assays, we demonstrate that short peptide motifs enriched with aromatic and large hydrophobic amino acid (aa) residues embedded in an acidic surrounding (AHA motifs) are essential for transcriptional activity of class A Hsfs. In contrast to this, class B and C Hsfs lack AHA motifs and have no activator function on their own. We also provide evidence for the function of a leucine (Leu)-rich region centered around a conserved QMGΦL motif at the very C-terminus as a nuclear export signal (NES) of class A Hsfs. Sequence comparison indicates that the combination of a C-terminal AHA motif with the consensus sequence FWxxF/L,F/I/L as well as the adjacent NES represents a signature domain for plant class A Hsfs, which allowed to identify more than 60 new Hsfs from the expressed sequence tag (EST) database.

Kotak S, Port M, Ganguli A, Bicker F, von Koskull-Doring P.
Characterization of C-terminal domains of Arabidopsis heat stress transcription factors (Hsfs) and identification of a new signature combination of plant class A Hsfs with AHA and NES motifs essential for activator function and intracellular localization.
Plant J, 2004. 39(1): p. 98-112.
PMID: 15200645