PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Oryza punctata
bHLH Family
Species TF ID Description
OPUNC01G00360.1bHLH family protein
OPUNC01G00520.1bHLH family protein
OPUNC01G00530.1bHLH family protein
OPUNC01G00700.1bHLH family protein
OPUNC01G03610.1bHLH family protein
OPUNC01G03610.2bHLH family protein
OPUNC01G05940.1bHLH family protein
OPUNC01G05940.2bHLH family protein
OPUNC01G07130.1bHLH family protein
OPUNC01G07130.2bHLH family protein
OPUNC01G08460.1bHLH family protein
OPUNC01G08460.2bHLH family protein
OPUNC01G09800.1bHLH family protein
OPUNC01G11630.1bHLH family protein
OPUNC01G11630.2bHLH family protein
OPUNC01G11990.1bHLH family protein
OPUNC01G18370.1bHLH family protein
OPUNC01G20250.1bHLH family protein
OPUNC01G20610.1bHLH family protein
OPUNC01G27950.1bHLH family protein
OPUNC01G28050.1bHLH family protein
OPUNC01G31740.1bHLH family protein
OPUNC01G32440.1bHLH family protein
OPUNC01G34850.1bHLH family protein
OPUNC01G37140.1bHLH family protein
OPUNC01G39450.1bHLH family protein
OPUNC01G39450.2bHLH family protein
OPUNC01G40520.1bHLH family protein
OPUNC01G41620.1bHLH family protein
OPUNC01G43070.1bHLH family protein
OPUNC02G00650.1bHLH family protein
OPUNC02G01010.1bHLH family protein
OPUNC02G08070.1bHLH family protein
OPUNC02G08680.1bHLH family protein
OPUNC02G09860.1bHLH family protein
OPUNC02G13570.1bHLH family protein
OPUNC02G13570.3bHLH family protein
OPUNC02G17910.1bHLH family protein
OPUNC02G17920.1bHLH family protein
OPUNC02G18940.1bHLH family protein
OPUNC02G21170.1bHLH family protein
OPUNC02G26270.1bHLH family protein
OPUNC02G27080.1bHLH family protein
OPUNC02G27080.2bHLH family protein
OPUNC02G27370.1bHLH family protein
OPUNC02G29130.1bHLH family protein
OPUNC02G30020.1bHLH family protein
OPUNC02G30580.1bHLH family protein
OPUNC02G33030.1bHLH family protein
OPUNC02G33630.1bHLH family protein
OPUNC03G01600.1bHLH family protein
OPUNC03G01600.2bHLH family protein
OPUNC03G02570.1bHLH family protein
OPUNC03G05030.1bHLH family protein
OPUNC03G05050.1bHLH family protein
OPUNC03G06240.1bHLH family protein
OPUNC03G07300.1bHLH family protein
OPUNC03G08950.1bHLH family protein
OPUNC03G09060.1bHLH family protein
OPUNC03G09880.1bHLH family protein
OPUNC03G12190.1bHLH family protein
OPUNC03G18280.1bHLH family protein
OPUNC03G18920.1bHLH family protein
OPUNC03G18920.2bHLH family protein
OPUNC03G23870.1bHLH family protein
OPUNC03G24740.1bHLH family protein
OPUNC03G24740.2bHLH family protein
OPUNC03G26580.1bHLH family protein
OPUNC03G26600.1bHLH family protein
OPUNC03G29750.1bHLH family protein
OPUNC03G29750.2bHLH family protein
OPUNC03G29750.3bHLH family protein
OPUNC03G29960.1bHLH family protein
OPUNC03G30800.3bHLH family protein
OPUNC03G31970.1bHLH family protein
OPUNC03G32220.1bHLH family protein
OPUNC03G33340.1bHLH family protein
OPUNC03G33340.2bHLH family protein
OPUNC03G33340.3bHLH family protein
OPUNC03G33340.4bHLH family protein
OPUNC03G33340.5bHLH family protein
OPUNC03G34510.1bHLH family protein
OPUNC03G34510.2bHLH family protein
OPUNC03G34870.1bHLH family protein
OPUNC03G35590.1bHLH family protein
OPUNC04G05620.1bHLH family protein
OPUNC04G05630.1bHLH family protein
OPUNC04G07110.1bHLH family protein
OPUNC04G08160.1bHLH family protein
OPUNC04G10810.1bHLH family protein
OPUNC04G14700.1bHLH family protein
OPUNC04G19030.1bHLH family protein
OPUNC04G19030.2bHLH family protein
OPUNC04G19040.1bHLH family protein
OPUNC04G19040.2bHLH family protein
OPUNC04G19610.1bHLH family protein
OPUNC04G19610.2bHLH family protein
OPUNC04G21010.1bHLH family protein
OPUNC04G21480.1bHLH family protein
OPUNC04G23010.1bHLH family protein
OPUNC04G23040.1bHLH family protein
OPUNC04G23980.1bHLH family protein
OPUNC04G24510.1bHLH family protein
OPUNC05G00160.1bHLH family protein
OPUNC05G02500.1bHLH family protein
OPUNC05G03740.1bHLH family protein
OPUNC05G04080.1bHLH family protein
OPUNC05G05910.1bHLH family protein
OPUNC05G16540.1bHLH family protein
OPUNC05G19450.2bHLH family protein
OPUNC05G21740.1bHLH family protein
OPUNC05G25080.1bHLH family protein
OPUNC05G25820.1bHLH family protein
OPUNC06G04110.1bHLH family protein
OPUNC06G05210.1bHLH family protein
OPUNC06G05770.1bHLH family protein
OPUNC06G05770.2bHLH family protein
OPUNC06G05770.3bHLH family protein
OPUNC06G06640.1bHLH family protein
OPUNC06G07810.1bHLH family protein
OPUNC06G10230.1bHLH family protein
OPUNC06G10230.2bHLH family protein
OPUNC06G10230.3bHLH family protein
OPUNC06G14520.1bHLH family protein
OPUNC06G15310.1bHLH family protein
OPUNC06G17210.1bHLH family protein
OPUNC06G19090.1bHLH family protein
OPUNC06G19090.2bHLH family protein
OPUNC06G25390.1bHLH family protein
OPUNC06G25390.2bHLH family protein
OPUNC07G02800.1bHLH family protein
OPUNC07G05040.1bHLH family protein
OPUNC07G05880.1bHLH family protein
OPUNC07G16420.1bHLH family protein
OPUNC07G16850.1bHLH family protein
OPUNC07G16850.2bHLH family protein
OPUNC07G16850.3bHLH family protein
OPUNC07G19390.1bHLH family protein
OPUNC07G21640.1bHLH family protein
OPUNC07G21720.1bHLH family protein
OPUNC08G00600.1bHLH family protein
OPUNC08G02220.1bHLH family protein
OPUNC08G04650.1bHLH family protein
OPUNC08G13730.1bHLH family protein
OPUNC08G15570.1bHLH family protein
OPUNC08G16020.1bHLH family protein
OPUNC08G16410.1bHLH family protein
OPUNC08G16700.1bHLH family protein
OPUNC08G16820.1bHLH family protein
OPUNC08G18020.1bHLH family protein
OPUNC08G18020.2bHLH family protein
OPUNC08G19080.1bHLH family protein
OPUNC08G19200.1bHLH family protein
OPUNC08G19920.1bHLH family protein
OPUNC08G19920.2bHLH family protein
OPUNC09G08950.1bHLH family protein
OPUNC09G11020.1bHLH family protein
OPUNC09G11520.1bHLH family protein
OPUNC09G11790.1bHLH family protein
OPUNC09G12260.1bHLH family protein
OPUNC09G12260.2bHLH family protein
OPUNC09G12310.2bHLH family protein
OPUNC09G12310.3bHLH family protein
OPUNC09G12310.4bHLH family protein
OPUNC09G13060.1bHLH family protein
OPUNC09G13060.2bHLH family protein
OPUNC09G13830.1bHLH family protein
OPUNC09G14440.1bHLH family protein
OPUNC10G00240.1bHLH family protein
OPUNC10G07050.1bHLH family protein
OPUNC10G08070.1bHLH family protein
OPUNC10G08090.1bHLH family protein
OPUNC10G15730.1bHLH family protein
OPUNC10G16560.1bHLH family protein
OPUNC10G16560.2bHLH family protein
OPUNC10G17860.1bHLH family protein
OPUNC11G02570.1bHLH family protein
OPUNC11G03540.1bHLH family protein
OPUNC11G10440.1bHLH family protein
OPUNC11G12640.1bHLH family protein
OPUNC11G15850.1bHLH family protein
OPUNC11G17200.1bHLH family protein
OPUNC12G11490.1bHLH family protein
OPUNC12G12060.1bHLH family protein
OPUNC12G15720.1bHLH family protein
OPUNC12G16230.1bHLH family protein
OPUNC12G16260.1bHLH family protein
OPUNC12G16260.2bHLH family protein
OPUNC12G16280.1bHLH family protein
OPUNC12G16660.1bHLH family protein
OPUNC12G16660.2bHLH family protein
OPUNC12G17950.1bHLH family protein
bHLH Family Introduction

The basic/helix-loop-helix (bHLH) proteins are a superfamily of transcription factors that have been well characterized in nonplant eukaryotes, especially in mammalian systems, in which considerable structural, functional, and phylogenetic analyses have been performed. The data indicate that bHLH proteins are important regulatory components in transcriptional networks in these systems, controlling a diversity of processes from cell proliferation to cell lineage establishment.

This family is defined by the bHLH signature domain, which consists of 60 amino acids with two functionally distinct regions. The basic region, located at the N-terminal end of the domain, is involved in DNA binding and consists of 15 amino acids with a high number of basic residues. The HLH region, at the C-terminal end, functions as a dimerization domain and is constituted mainly of hydrophobic residues that form two amphipathic -helices separated by a loop region of variable sequence and length. Outside of the conserved bHLH domain, these proteins exhibit considerable sequence divergence. Cocrystal structural analysis has shown that the interaction between the HLH regions of two separate polypeptides leads to the formation of homodimers and/or heterodimers and that the basic region of each partner binds to half of the DNA recognition sequence. Some bHLH proteins form homodimers or restrict their heterodimerization activity to closely related members of the family. On the other hand, some can form heterodimers with one or several different partners.

The core DNA sequence motif recognized by the bHLH proteins is a consensus hexanucleotide sequence known as the E-box (5'-CANNTG-3'). There are different types of E-boxes, depending on the identity of the two central bases. One of the most common is the palindromic G-box (5'-CACGTG-3'). Certain conserved amino acids within the basic region of the protein provide recognition of the core consensus site, whereas other residues in the domain dictate specificity for a given type of E-box . In addition, flanking nucleotides outside of the hexanucleotide core have been shown to play a role in binding specificity, and there is evidence that a loop residue in the protein plays a role in DNA binding through elements that lie outside of the core recognition sequence.

Toledo-Ortiz G, Huq E, Quail PH.
The Arabidopsis basic/helix-loop-helix transcription factor family.
Plant Cell. 2003 Aug;15(8):1749-70
PMID: 12897250