PlantTFDB
PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Citrus unshiu
bHLH Family
Species TF ID Description
GAY31923.1bHLH family protein
GAY32061.1bHLH family protein
GAY32777.1bHLH family protein
GAY33857.1bHLH family protein
GAY34247.1bHLH family protein
GAY34280.1bHLH family protein
GAY34283.1bHLH family protein
GAY34335.1bHLH family protein
GAY34525.1bHLH family protein
GAY34526.1bHLH family protein
GAY34716.1bHLH family protein
GAY35659.1bHLH family protein
GAY36361.1bHLH family protein
GAY36363.1bHLH family protein
GAY36365.1bHLH family protein
GAY36513.1bHLH family protein
GAY36612.1bHLH family protein
GAY36823.1bHLH family protein
GAY36954.1bHLH family protein
GAY37259.1bHLH family protein
GAY37260.1bHLH family protein
GAY37574.1bHLH family protein
GAY38629.1bHLH family protein
GAY38753.1bHLH family protein
GAY38782.1bHLH family protein
GAY38841.1bHLH family protein
GAY38860.1bHLH family protein
GAY38972.1bHLH family protein
GAY39042.1bHLH family protein
GAY39045.1bHLH family protein
GAY39119.1bHLH family protein
GAY39542.1bHLH family protein
GAY39552.1bHLH family protein
GAY39553.1bHLH family protein
GAY39599.1bHLH family protein
GAY40164.1bHLH family protein
GAY40454.1bHLH family protein
GAY40707.1bHLH family protein
GAY41298.1bHLH family protein
GAY41299.1bHLH family protein
GAY41300.1bHLH family protein
GAY41301.1bHLH family protein
GAY41302.1bHLH family protein
GAY41405.1bHLH family protein
GAY41406.1bHLH family protein
GAY41407.1bHLH family protein
GAY41548.1bHLH family protein
GAY41903.1bHLH family protein
GAY42188.1bHLH family protein
GAY43034.1bHLH family protein
GAY43390.1bHLH family protein
GAY43690.1bHLH family protein
GAY43774.1bHLH family protein
GAY43900.1bHLH family protein
GAY44257.1bHLH family protein
GAY44617.1bHLH family protein
GAY44734.1bHLH family protein
GAY44735.1bHLH family protein
GAY44736.1bHLH family protein
GAY44962.1bHLH family protein
GAY45248.1bHLH family protein
GAY45575.1bHLH family protein
GAY45729.1bHLH family protein
GAY45784.1bHLH family protein
GAY45818.1bHLH family protein
GAY45819.1bHLH family protein
GAY45820.1bHLH family protein
GAY45821.1bHLH family protein
GAY46015.1bHLH family protein
GAY46308.1bHLH family protein
GAY46309.1bHLH family protein
GAY47053.1bHLH family protein
GAY47551.1bHLH family protein
GAY47610.1bHLH family protein
GAY48024.1bHLH family protein
GAY48025.1bHLH family protein
GAY48026.1bHLH family protein
GAY48097.1bHLH family protein
GAY48711.1bHLH family protein
GAY48891.1bHLH family protein
GAY49177.1bHLH family protein
GAY49595.1bHLH family protein
GAY50741.1bHLH family protein
GAY50893.1bHLH family protein
GAY50894.1bHLH family protein
GAY50895.1bHLH family protein
GAY50896.1bHLH family protein
GAY50897.1bHLH family protein
GAY50898.1bHLH family protein
GAY50899.1bHLH family protein
GAY50900.1bHLH family protein
GAY50901.1bHLH family protein
GAY51085.1bHLH family protein
GAY51124.1bHLH family protein
GAY52366.1bHLH family protein
GAY52378.1bHLH family protein
GAY53036.1bHLH family protein
GAY53403.1bHLH family protein
GAY54261.1bHLH family protein
GAY54916.1bHLH family protein
GAY55664.1bHLH family protein
GAY55673.1bHLH family protein
GAY55674.1bHLH family protein
GAY55776.1bHLH family protein
GAY55985.1bHLH family protein
GAY56739.1bHLH family protein
GAY56740.1bHLH family protein
GAY57325.1bHLH family protein
GAY57830.1bHLH family protein
GAY57931.1bHLH family protein
GAY58472.1bHLH family protein
GAY58579.1bHLH family protein
GAY58724.1bHLH family protein
GAY58727.1bHLH family protein
GAY58728.1bHLH family protein
GAY59044.1bHLH family protein
GAY59045.1bHLH family protein
GAY59046.1bHLH family protein
GAY59047.1bHLH family protein
GAY59213.1bHLH family protein
GAY59214.1bHLH family protein
GAY59617.1bHLH family protein
GAY59618.1bHLH family protein
GAY61392.1bHLH family protein
GAY61867.1bHLH family protein
GAY61990.1bHLH family protein
GAY62282.1bHLH family protein
GAY62283.1bHLH family protein
GAY62923.1bHLH family protein
GAY62924.1bHLH family protein
GAY62925.1bHLH family protein
GAY63000.1bHLH family protein
GAY63001.1bHLH family protein
GAY63294.1bHLH family protein
GAY63541.1bHLH family protein
GAY63828.1bHLH family protein
GAY63844.1bHLH family protein
GAY63845.1bHLH family protein
GAY64340.1bHLH family protein
GAY64573.1bHLH family protein
GAY64595.1bHLH family protein
GAY64615.1bHLH family protein
GAY64616.1bHLH family protein
GAY64777.1bHLH family protein
GAY64869.1bHLH family protein
GAY65367.1bHLH family protein
GAY65368.1bHLH family protein
GAY65397.1bHLH family protein
GAY65529.1bHLH family protein
GAY65530.1bHLH family protein
GAY66764.1bHLH family protein
GAY66765.1bHLH family protein
GAY66766.1bHLH family protein
GAY66806.1bHLH family protein
GAY67810.1bHLH family protein
GAY69347.1bHLH 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