Toolkit/basic helix-loop-helix (bHLH) domain

basic helix-loop-helix (bHLH) domain

Protein Domain·Research·Since 2021

Also known as: bHLH motif, helix-loop-helix (HLH) region

Taxonomy: Mechanism Branch / Component. Workflows sit above the mechanism and technique branches rather than replacing them.

Summary

The basic helix-loop-helix (bHLH) domain is a highly conserved eukaryotic protein motif present in transcription factors. It contains a basic DNA-binding region and a helix-loop-helix region, supporting transcriptional regulatory functions across diverse physiological contexts.

Usefulness & Problems

Why this is useful

The bHLH domain is useful as a modular transcription factor motif associated with regulation of biosynthesis, metabolism, plant hormone transduction, growth and development, stress responses, biochemical functions, and signaling networks. The supplied evidence supports its broad biological relevance, particularly in Arabidopsis and across eukaryotes.

Problem solved

This domain provides a conserved structural basis for sequence-specific DNA-associated transcriptional regulation within bHLH transcription factors. The evidence indicates that it helps couple transcriptional control to diverse physiological and signaling processes, but does not describe a specific engineered application.

Taxonomy & Function

Primary hierarchy

Mechanism Branch

Component: A low-level protein part used inside a larger architecture that realizes a mechanism.

Techniques

No technique tags yet.

Target processes

signalingtranscription

Input: Chemical

Implementation Constraints

The available evidence identifies the domain as part of bHLH transcription factors and specifies two conserved components: a basic DNA-binding region and an HLH region. No evidence is provided here on cofactors, construct design, delivery methods, or expression systems.

The supplied evidence describes biological role and conservation, but does not provide quantitative performance data, structural resolution, or direct tool-engineering validation. Evidence for specific implementation as a standalone biotechnology tool is limited.

Validation

Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication

Supporting Sources

Ranked Claims

Claim 1biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 2biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 3biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 4biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 5biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 6biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 7biological rolesupports2021Source 1needs review

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.
Claim 8conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 9conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 10conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 11conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 12conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 13conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 14conservationsupports2021Source 1needs review

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms
Claim 15family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 16family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 17family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 18family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 19family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 20family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 21family scopesupports2021Source 1needs review

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana
Claim 22mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 23mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 24mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 25mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 26mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 27mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 28mechanistic rolesupports2021Source 1needs review

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes
Claim 29structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.
Claim 30structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.
Claim 31structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.
Claim 32structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.
Claim 33structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.
Claim 34structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.
Claim 35structural featuresupports2021Source 1needs review

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.

Approval Evidence

1 source5 linked approval claimsfirst-pass slug basic-helix-loop-helix-bhlh-domain
The basic helix-loop-helix (bHLH) transcription factor family ... contains a bHLH motif that is highly conserved throughout eukaryotic organisms. Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.

Source:

biological rolesupports

bHLH transcription factors are involved in many physiological processes including biosynthesis, metabolism, and plant hormone transduction, and have pleiotropic regulatory roles in plant growth and development, stress response, biochemical functions, and signaling networks.

which are involved in many physiological processes and have a broad range of functions in biosynthesis, metabolism and transduction of plant hormones. In this review, we summarize various aspects of related studies that provide an overview of insights into the pleiotropic regulatory roles of these transcription factors in plant growth and development, stress response, biochemical functions and the web of signaling networks.

Source:

conservationsupports

The bHLH motif is highly conserved throughout eukaryotic organisms.

contains a bHLH motif that is highly conserved throughout eukaryotic organisms

Source:

family scopesupports

The bHLH transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana.

The basic helix-loop-helix (bHLH) transcription factor family is one of the largest transcription factor gene families in Arabidopsis thaliana

Source:

mechanistic rolesupports

Proteins containing the bHLH domain usually act as homo- or heterodimers to regulate expression of target genes.

These proteins containing bHLH domain usually act as homo- or heterodimers to regulate the expression of their target genes

Source:

structural featuresupports

bHLH family proteins contain a basic DNA-binding region and a helix-loop-helix region as conserved motifs.

Members of this family have two conserved motifs, a basic DNA binding region and a helix-loop-helix (HLH) region.

Source:

Comparisons

Source-backed strengths

A key strength is its high conservation throughout eukaryotic organisms, which supports broad biological significance. The domain architecture is clearly defined by two conserved motifs: a basic DNA-binding region and a helix-loop-helix region.

Ranked Citations

  1. 1.
    StructuralSource 1International Journal of Molecular Sciences2021Claim 1Claim 2Claim 3

    Seeded from load plan for claim cl1. Extracted from this source document.