The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Helix-loop-helix DNA-binding domain
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 116: Putative HLH transcription factor

Please note: GO annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

There are 12 GO terms relating to "molecular function"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Transcription regulatory region sequence-specific DNA binding GO:0000976
Interacting selectively and non-covalently with a specific sequence of DNA that is part of a regulatory region that controls transcription of that section of the DNA. The transcribed region might be described as a gene, cistron, or operon.
1 Q4WIN1 (/IDA)
RNA polymerase II proximal promoter sequence-specific DNA binding GO:0000978
Interacting selectively and non-covalently with a specific upstream regulatory DNA sequence (transcription factor recognition sequence or binding site) located in the proximal promoter of a gene transcribed by RNA polymerase II. The proximal promoter is in cis with and relatively close to the core promoter.
1 Q9UUD1 (/IDA)
RNA polymerase II proximal promoter sequence-specific DNA binding GO:0000978
Interacting selectively and non-covalently with a specific upstream regulatory DNA sequence (transcription factor recognition sequence or binding site) located in the proximal promoter of a gene transcribed by RNA polymerase II. The proximal promoter is in cis with and relatively close to the core promoter.
1 Q9UUD1 (/IMP)
RNA polymerase II proximal promoter sequence-specific DNA binding GO:0000978
Interacting selectively and non-covalently with a specific upstream regulatory DNA sequence (transcription factor recognition sequence or binding site) located in the proximal promoter of a gene transcribed by RNA polymerase II. The proximal promoter is in cis with and relatively close to the core promoter.
1 O43019 (/ISM)
DNA-binding transcription factor activity, RNA polymerase II-specific GO:0000981
A protein or a member of a complex that interacts selectively and non-covalently with a specific DNA sequence (sometimes referred to as a motif) within the regulatory region of a RNA polymerase II-transcribed gene to modulate transcription. Regulatory regions include promoters (proximal and distal) and enhancers. Genes are transcriptional units.
1 O43019 (/ISM)
DNA-binding transcription repressor activity, RNA polymerase II-specific GO:0001227
A protein or a member of a complex that interacts selectively and non-covalently with a specific DNA sequence (sometimes referred to as a motif) within the regulatory region of a RNA polymerase II-transcribed gene to repress or decrease transcription. Regulatory regions include promoters (proximal and distal) and enhancers. Genes are transcriptional units.
1 Q9UUD1 (/IMP)
DNA-binding transcription activator activity, RNA polymerase II-specific GO:0001228
A protein or a member of a complex that interacts selectively and non-covalently with a specific DNA sequence (sometimes referred to as a motif) within the regulatory region of a RNA polymerase II-transcribed gene to activate or increase transcription. Regulatory regions include promoters (proximal and distal) and enhancers. Genes are transcriptional units.
1 Q9UUD1 (/IMP)
DNA binding GO:0003677
Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
1 Q9UUD1 (/IDA)
Double-stranded DNA binding GO:0003690
Interacting selectively and non-covalently with double-stranded DNA.
1 Q59RL7 (/IDA)
DNA-binding transcription factor activity GO:0003700
A protein or a member of a complex that interacts selectively and non-covalently with a specific DNA sequence (sometimes referred to as a motif) within the regulatory region of a gene to modulate transcription. Regulatory regions include promoters (proximal and distal) and enhancers. Genes are transcriptional units, and include bacterial operons.
1 Q59RL7 (/IMP)
Protein binding GO:0005515
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
1 Q9UUD1 (/IPI)
Sterol response element binding GO:0032810
Interacting selectively and non-covalently with the sterol response element (SRE), a nonpalindromic sequence found in the promoters of genes involved in lipid metabolism.
1 Q4WIN1 (/IDA)

There are 29 GO terms relating to "biological process"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Regulation of transcription, DNA-templated GO:0006355
Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription.
2 Q4WIN1 (/IMP) Q59RL7 (/IMP)
Positive regulation of transcription by RNA polymerase II GO:0045944
Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.
2 Q59RL7 (/IMP) Q9UUD1 (/IMP)
Cellular response to hypoxia GO:0071456
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating lowered oxygen tension. Hypoxia, defined as a decline in O2 levels below normoxic levels of 20.8 - 20.95%, results in metabolic adaptation at both the cellular and organismal level.
2 Q4WIN1 (/IMP) Q9UUD1 (/IMP)
Regulation of transcription by RNA polymerase II GO:0006357
Any process that modulates the frequency, rate or extent of transcription mediated by RNA polymerase II.
1 Q59RL7 (/IMP)
Regulation of transcription by RNA polymerase II GO:0006357
Any process that modulates the frequency, rate or extent of transcription mediated by RNA polymerase II.
1 O43019 (/NAS)
Cellular iron ion homeostasis GO:0006879
Any process involved in the maintenance of an internal steady state of iron ions at the level of a cell.
1 Q4WIN1 (/IMP)
Pathogenesis GO:0009405
The set of specific processes that generate the ability of an organism to induce an abnormal, generally detrimental state in another organism.
1 Q4WIN1 (/IMP)
Regulation of transcription, start site selection GO:0010630
Any process that modulates the frequency, rate or extent of the synthesis of either RNA on a template of DNA or DNA on a template of RNA by a mechanism that selects the start site along that template.
1 Q9UUD1 (/IEP)
Sterol metabolic process GO:0016125
The chemical reactions and pathways involving sterols, steroids with one or more hydroxyl groups and a hydrocarbon side-chain in the molecule.
1 Q4WIN1 (/IMP)
Filamentous growth GO:0030447
The process in which a multicellular organism, a unicellular organism or a group of unicellular organisms grow in a threadlike, filamentous shape.
1 Q59RL7 (/IMP)
SREBP signaling pathway GO:0032933
A series of molecular signals from the endoplasmic reticulum to the nucleus generated as a consequence of decreased levels of one or more sterols (and in some yeast, changes in oxygen levels) and which proceeds through activation of a sterol response element binding transcription factor (SREBP) to result in up-regulation of target gene transcription.
1 Q9UUD1 (/IMP)
Cellular response to heat GO:0034605
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a heat stimulus, a temperature stimulus above the optimal temperature for that organism.
1 Q59RL7 (/IMP)
Cellular response to drug GO:0035690
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
1 Q59RL7 (/IMP)
Positive regulation of ergosterol biosynthetic process by positive regulation of transcription from RNA polymerase II promoter GO:0035961
Any process that activates or increases the frequency, rate or extent of ergosterol biosynthesis by activating or increasing the frequency, rate or extent of transcription from an RNA polymerase II promoter.
1 Q9UUD1 (/IMP)
Filamentous growth of a population of unicellular organisms in response to chemical stimulus GO:0036171
The process in which a group of unicellular organisms grow in a threadlike, filamentous shape in response to a chemical stimulus.
1 Q59RL7 (/IMP)
Filamentous growth of a population of unicellular organisms in response to neutral pH GO:0036178
The process in which a group of unicellular organisms grow in a threadlike, filamentous shape in response to a neutral pH (pH close to 7) stimulus.
1 Q59RL7 (/IMP)
Filamentous growth of a population of unicellular organisms in response to biotic stimulus GO:0036180
The process in which a group of unicellular organisms grow in a threadlike, filamentous shape in response to a biotic (living) stimulus.
1 Q59RL7 (/IMP)
Cellular response to neutral pH GO:0036244
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a neutral pH (pH close to 7) stimulus. pH is a measure of the acidity or basicity of an aqueous solution.
1 Q59RL7 (/IMP)
Filamentous growth of a population of unicellular organisms GO:0044182
The process in which a group of unicellular organisms grow in a threadlike, filamentous shape.
1 Q59RL7 (/IMP)
Symbiont process GO:0044403
A process carried out by symbiont gene products that enables the interaction between two organisms living together in more or less intimate association. The various forms of symbiosis include parasitism, in which the association is disadvantageous or destructive to one of the organisms; mutualism, in which the association is advantageous, or often necessary to one or both and not harmful to either; and commensalism, in which one member of the association benefits while the other is not affected. However, mutualism, parasitism, and commensalism are often not discrete categories of interactions and should rather be perceived as a continuum of interaction ranging from parasitism to mutualism. In fact, the direction of a symbiotic interaction can change during the lifetime of the symbionts due to developmental changes as well as changes in the biotic/abiotic environment in which the interaction occurs. Microscopic symbionts are often referred to as endosymbionts.
1 Q59RL7 (/IMP)
Positive regulation of transcription from RNA polymerase II promoter in response to hypoxia GO:0061419
Any process that increases the frequency, rate or extent of transcription from an RNA polymerase II promoter as a result of a hypoxia stimulus.
1 Q9UUD1 (/IMP)
Cellular response to copper ion GO:0071280
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a copper ion stimulus.
1 Q59RL7 (/IMP)
Oxygen metabolic process GO:0072592
The chemical reactions and pathways involving diatomic oxygen (O2).
1 Q9UUD1 (/IMP)
Negative regulation of cellular response to hypoxia GO:1900038
Any process that stops, prevents or reduces the frequency, rate or extent of cellular response to hypoxia.
1 Q9UUD1 (/IC)
Positive regulation of phospholipid biosynthetic process by positive regulation of transcription from RNA polymerase II promoter GO:1900413
A positive regulation of transcription from RNA polymerase II promoter that results in positive regulation of phospholipid biosynthetic process.
1 Q9UUD1 (/IMP)
Positive regulation of filamentous growth of a population of unicellular organisms GO:1900430
Any process that activates or increases the frequency, rate or extent of filamentous growth of a population of unicellular organisms.
1 Q59RL7 (/IMP)
Positive regulation of filamentous growth of a population of unicellular organisms in response to chemical stimulus GO:1900439
Any process that activates or increases the frequency, rate or extent of filamentous growth of a population of unicellular organisms in response to chemical stimulus.
1 Q59RL7 (/IMP)
Positive regulation of filamentous growth of a population of unicellular organisms in response to neutral pH GO:1900442
Any process that activates or increases the frequency, rate or extent of filamentous growth of a population of unicellular organisms in response to neutral pH.
1 Q59RL7 (/IMP)
Positive regulation of filamentous growth of a population of unicellular organisms in response to biotic stimulus GO:1900445
Any process that activates or increases the frequency, rate or extent of filamentous growth of a population of unicellular organisms in response to biotic stimulus.
1 Q59RL7 (/IMP)

There are 9 GO terms relating to "cellular component"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Nuclear chromatin GO:0000790
The ordered and organized complex of DNA, protein, and sometimes RNA, that forms the chromosome in the nucleus.
2 O43019 (/IDA) Q9UUD1 (/IDA)
Nucleus GO:0005634
A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
1 Q59RL7 (/IDA)
Nuclear envelope GO:0005635
The double lipid bilayer enclosing the nucleus and separating its contents from the rest of the cytoplasm; includes the intermembrane space, a gap of width 20-40 nm (also called the perinuclear space).
1 Q4WIN1 (/IMP)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 O43019 (/HDA)
Endoplasmic reticulum membrane GO:0005789
The lipid bilayer surrounding the endoplasmic reticulum.
1 Q4WIN1 (/IMP)
Membrane GO:0016020
A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
1 Q59RL7 (/IDA)
Integral component of membrane GO:0016021
The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 O43019 (/ISM)
SREBP-SCAP complex GO:0032936
A protein complex formed by the association of sterol regulatory element binding protein (SREBP) and SREBP-cleavage-activating protein (SCAP) in the ER membrane; in the absence of sterols, the SREBP-SCAP complex is packaged into COPII vesicles and travels to the Golgi apparatus to be processed.
1 Q9UUD1 (/IDA)
Integral component of cytoplasmic side of endoplasmic reticulum membrane GO:0071458
The component of the endoplasmic reticulum membrane consisting of the gene products that penetrate only the cytoplasmic side of the membrane.
1 Q9UUD1 (/TAS)
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