Harmonizome 3.0

basic helix-loop-helix family, member a15

Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in several processes, including cellular response to glucose starvation; negative regulation of myotube differentiation; and neuron differentiation. Predicted to act upstream of or within several processes, including cell-cell adhesion mediated by cadherin; intracellular distribution of mitochondria; and type B pancreatic cell maturation. Predicted to be located in chromatin. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Mar 2025]

oligodendrocytic myelin paranodal and inner loop protein

Predicted to be involved in regulation of oligodendrocyte differentiation. Located in Golgi apparatus. [provided by Alliance of Genome Resources, Mar 2025]

PQ loop repeat containing 3

Predicted to be located in membrane. [provided by Alliance of Genome Resources, Mar 2025]

mesoderm posterior basic helix-loop-helix transcription factor 1

Enables DNA-binding transcription factor activity and transcription cis-regulatory region binding activity. Involved in several processes, including endothelial cell differentiation; heart development; and positive regulation of transcription by RNA polymerase II. Predicted to be located in chromatin. Predicted to be active in nucleus. Implicated in myocardial infarction. Biomarker of diabetic retinopathy. [provided by Alliance of Genome Resources, Mar 2025]

mesoderm posterior basic helix-loop-helix transcription factor 2

This gene encodes a member of the bHLH family of transcription factors and plays a key role in defining the rostrocaudal patterning of somites via interactions with multiple Notch signaling pathways. This gene is expressed in the anterior presomitic mesoderm and is downregulated immediately after the formation of segmented somites. This gene also plays a role in the formation of epithelial somitic mesoderm and cardiac mesoderm. Mutations in the MESP2 gene cause autosomal recessive spondylocostal dystosis 2 (SCD02). [provided by RefSeq, Oct 2008]

GPN-loop GTPase 3

Predicted to enable GTPase activity. Part of protein-containing complex. [provided by Alliance of Genome Resources, Mar 2025]

GPN-loop GTPase 1

This gene encodes a guanosine triphosphatase enzyme. The encoded protein may play a role in DNA repair and may function in activation of transcription. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2009]

scleraxis basic helix-loop-helix transcription factor

Enables DNA-binding transcription activator activity, RNA polymerase II-specific and bHLH transcription factor binding activity. Contributes to E-box binding activity. Involved in positive regulation of transcription by RNA polymerase II. Located in nucleus. Part of transcription regulator complex. [provided by Alliance of Genome Resources, Mar 2025]

basic helix-loop-helix and HMG box domain containing 1

Predicted to enable DNA binding activity and protein dimerization activity. Predicted to be involved in several processes, including activation of meiosis; cellular response to retinoic acid; and regulation of transcription by RNA polymerase II. Predicted to be located in nucleus. [provided by Alliance of Genome Resources, Mar 2025]

hypoxia inducible factor 1, alpha subunit (basic helix-loop-helix transcription factor) pseudogene 1

folliculogenesis specific basic helix-loop-helix

This gene encodes a protein that functions in postnatal oocyte-specific gene expression. The protein is a basic helix-loop-helix transcription factor that regulates multiple oocyte-specific genes, including genes involved in folliculogenesis and those that encode the zona pellucida. Mutations in this gene cause premature ovarian failure type 6. [provided by RefSeq, Sep 2009]

inhibitor of DNA binding 2B, dominant negative helix-loop-helix protein (pseudogene)

PQ loop repeat containing 2

Enables L-arginine transmembrane transporter activity; L-histidine transmembrane transporter activity; and L-lysine transmembrane transporter activity. Involved in L-amino acid transport and intracellular amino acid homeostasis. Located in lysosomal membrane. [provided by Alliance of Genome Resources, Mar 2025]

PQ loop repeat containing 1

Predicted to be involved in phospholipid translocation and retrograde transport, endosome to Golgi. Predicted to be located in cytosol and membrane. Predicted to be active in endosome and trans-Golgi network. [provided by Alliance of Genome Resources, Mar 2025]

NTPase, KAP family P-loop domain containing 1

Predicted to be located in membrane. [provided by Alliance of Genome Resources, Mar 2025]

transcription factor 15 (basic helix-loop-helix)

The protein encoded by this gene is found in the nucleus and may be involved in the early transcriptional regulation of patterning of the mesoderm. The encoded basic helix-loop-helix protein requires dimerization with another basic helix-loop-helix protein for efficient DNA binding. [provided by RefSeq, Jul 2008]

GPN-loop GTPase 3 pseudogene 1

GIMAP family P-loop NTPase domain containing 1

Predicted to enable GTP binding activity. [provided by Alliance of Genome Resources, Mar 2025]

transcription factor-like 5 (basic helix-loop-helix)

Enables DNA-binding transcription repressor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Involved in several processes, including negative regulation of transcription by RNA polymerase II; regulation of cell population proliferation; and spermatogenesis. Located in nucleus. [provided by Alliance of Genome Resources, Mar 2025]

basic helix-loop-helix family, member e40

This gene encodes a basic helix-loop-helix protein expressed in various tissues. The encoded protein can interact with ARNTL or compete for E-box binding sites in the promoter of PER1 and repress CLOCK/ARNTL's transactivation of PER1. This gene is believed to be involved in the control of circadian rhythm and cell differentiation. [provided by RefSeq, Feb 2014]

stem-loop binding protein

This gene encodes a protein that binds to the stem-loop structure in replication-dependent histone mRNAs. Histone mRNAs do not contain introns or polyadenylation signals, and are processed by endonucleolytic cleavage. The stem-loop structure is essential for efficient processing but this structure also controls the transport, translation and stability of histone mRNAs. Expression of the protein is regulated during the cell cycle, increasing more than 10-fold during the latter part of G1. [provided by RefSeq, Jul 2008]

hypoxia inducible factor 1, alpha subunit (basic helix-loop-helix transcription factor)

This gene encodes the alpha subunit of transcription factor hypoxia-inducible factor-1 (HIF-1), which is a heterodimer composed of an alpha and a beta subunit. HIF-1 functions as a master regulator of cellular and systemic homeostatic response to hypoxia by activating transcription of many genes, including those involved in energy metabolism, angiogenesis, apoptosis, and other genes whose protein products increase oxygen delivery or facilitate metabolic adaptation to hypoxia. HIF-1 thus plays an essential role in embryonic vascularization, tumor angiogenesis and pathophysiology of ischemic disease. Alternatively spliced transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Jul 2011]

SRA stem-loop interacting RNA binding protein

Steroid receptor RNA activator (SRA, or SRA1; MIM 603819) is a complex RNA molecule containing multiple stable stem-loop structures that functions in coactivation of nuclear receptors. SLIRP interacts with stem-loop structure-7 of SRA (STR7) and modulates nuclear receptor transactivation (Hatchell et al., 2006 [PubMed 16762838]).[supplied by OMIM, Mar 2008]

basic helix-loop-helix family, member e22

This gene encodes a protein that belongs to the basic helix-loop-helix (bHLH) family of transcription factors that regulate cell fate determination, proliferation, and differentiation. A similar protein in mouse is required for the development of the dorsal cochlear nuclei, and is thought to play a role in in the differentiation of neurons involved in sensory input. The mouse protein also functions in retinogenesis. [provided by RefSeq, Oct 2016]

basic helix-loop-helix family, member e23

This gene encodes a member of the basic helix-loop-helix transcription factor family. Members of this family contain two highly conserved and functionally distinct domains: the basic domain targets sequence-specific DNA binding, while the helix-loop-helix domain facilitates protein interaction. Studies of a related gene in mouse suggest that the encoded protein may function as a transcriptional repressor in the pancreas and brain, and that it is required for normal retinal function. [provided by RefSeq, May 2013]

GPN-loop GTPase 1 pseudogene

PQ loop repeat containing 2-like

Predicted to enable L-lysine transmembrane transporter activity. Predicted to be involved in L-lysine transmembrane transport. Predicted to be active in lysosomal membrane. [provided by Alliance of Genome Resources, Mar 2025]

basic helix-loop-helix domain containing, class B, 9 pseudogene 1

SRA stem-loop interacting RNA binding protein pseudogene

SRA stem-loop interacting RNA binding protein pseudogene

GPN-loop GTPase 2

Predicted to enable GTPase activity. [provided by Alliance of Genome Resources, Mar 2025]

basic helix-loop-helix family, member a9

This gene is a member of the basic helix-loop-helix family. The encoded protein is a transcription factor involved in limb development. Mutations in this gene have been associated with mesoaxial synostotic syndactyly Malik-Percin type (MSSD). Copy number variation of a locus containing this gene has been linked to a form of split-hand/foot malformation with long bone deficiency (SHFLD3). [provided by RefSeq, Mar 2015]

stem-loop binding protein pseudogene

transcription factor 25 (basic helix-loop-helix)

TCF25 is a member of the basic helix-loop-helix (bHLH) family of transcription factors that are important in embryonic development (Steen and Lindholm, 2008 [PubMed 18068114]).[supplied by OMIM, Sep 2008]

inhibitor of DNA binding 4, dominant negative helix-loop-helix protein

This gene encodes a member of the inhibitor of DNA binding (ID) protein family. The encoded protein lacks DNA binding ability, and instead regulates gene expression through binding to and inhibiting basic helix-loop-helix transcription factors. This protein has been implicated in the regulation of diverse cellular processes that play a role in development and tumorigenesis. [provided by RefSeq, Aug 2017]

inhibitor of DNA binding 2, dominant negative helix-loop-helix protein

The protein encoded by this gene belongs to the inhibitor of DNA binding family, members of which are transcriptional regulators that contain a helix-loop-helix (HLH) domain but not a basic domain. Members of the inhibitor of DNA binding family inhibit the functions of basic helix-loop-helix transcription factors in a dominant-negative manner by suppressing their heterodimerization partners through the HLH domains. This protein may play a role in negatively regulating cell differentiation. A pseudogene of this gene is located on chromosome 3. [provided by RefSeq, Aug 2011]

inhibitor of DNA binding 3, dominant negative helix-loop-helix protein

The protein encoded by this gene is a helix-loop-helix (HLH) protein that can form heterodimers with other HLH proteins. However, the encoded protein lacks a basic DNA-binding domain and therefore inhibits the DNA binding of any HLH protein with which it interacts. [provided by RefSeq, Aug 2011]

inhibitor of DNA binding 1, dominant negative helix-loop-helix protein

The protein encoded by this gene is a helix-loop-helix (HLH) protein that can form heterodimers with members of the basic HLH family of transcription factors. The encoded protein has no DNA binding activity and therefore can inhibit the DNA binding and transcriptional activation ability of basic HLH proteins with which it interacts. This protein may play a role in cell growth, senescence, and differentiation. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

basic helix-loop-helix family, member e41

This gene encodes a basic helix-loop-helix protein expressed in various tissues. The encoded protein can interact with ARNTL or compete for E-box binding sites in the promoter of PER1 and repress CLOCK/ARNTL's transactivation of PER1. This gene is believed to be involved in the control of circadian rhythm and cell differentiation. Defects in this gene are associated with the short sleep phenotype. [provided by RefSeq, Feb 2014]

nescient helix loop helix 1

The helix-loop-helix (HLH) proteins are a family of putative transcription factors, some of which have been shown to play an important role in growth and development of a wide variety of tissues and species. Four members of this family have been clearly implicated in tumorigenesis via their involvement in chromosomal translocations in lymphoid tumors: MYC (MIM 190080), LYL1 (MIM 151440), E2A (MIM 147141), and SCL (MIM 187040).[supplied by OMIM, Nov 2002]

conserved helix-loop-helix ubiquitous kinase

This gene encodes a member of the serine/threonine protein kinase family. The encoded protein, a component of a cytokine-activated protein complex that is an inhibitor of the essential transcription factor NF-kappa-B complex, phosphorylates sites that trigger the degradation of the inhibitor via the ubiquination pathway, thereby activating the transcription factor. [provided by RefSeq, Jul 2008]

basic helix-loop-helix domain containing, class B, 9

This gene is a member of a gene family which encodes proteins with a basic helix-loop-helix domain. Other members of this gene family encode proteins which function as transcription factors, either enhancing or inhibiting transcription depending on the activity of other DNA binding proteins. The coding region of this gene is located entirely within the terminal exon. The encoded protein may be involved in the survival of neurons (PMID: 15034937). Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Sep 2011]

PQ loop repeat containing 1 pseudogene 2

spermatogenesis and oogenesis specific basic helix-loop-helix 1

This gene encodes one of testis-specific transcription factors which are essential for spermatogenesis, oogenesis and folliculogenesis. This gene is located on chromosome 9. Mutations in this gene are associated with nonobstructive azoospermia. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2013]

spermatogenesis and oogenesis specific basic helix-loop-helix 2

This gene encodes one of testis-specific transcription factors which are essential for spermatogenesis, oogenesis and folliculogenesis. This gene is located on chromosome 13. The proteins encoded by this gene and another testis-specific transcription factor, SOHLH1, can form heterodimers, in addition to homodimers. There is a read-through locus (GeneID: 100526761) that shares sequence identity with this gene and the upstream CCDC169 (GeneID: 728591). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2013]

nescient helix loop helix 2

Enables RNA polymerase II-specific DNA-binding transcription factor binding activity and sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Predicted to act upstream of or within with a positive effect on apoptotic process; hypothalamus gonadotrophin-releasing hormone neuron development; and peripheral nervous system development. Predicted to act upstream of or within several processes, including cell migration in hindbrain; male gonad development; and male mating behavior. Predicted to be located in chromatin. Predicted to be part of transcription regulator complex. Implicated in hypogonadotropic hypogonadism. [provided by Alliance of Genome Resources, Mar 2025]

basic helix-loop-helix ARNT like 2

This gene encodes a basic helix-loop-helix transcription factor belonging to the PAS (PER, ARNT, SIM) superfamily. The PAS proteins play important roles in adaptation to low atmospheric and cellular oxygen levels, exposure to certain environmental pollutants, and diurnal oscillations in light and temperature. This protein forms a transcriptionally active heterodimer with the circadian CLOCK protein, the structurally related MOP4, and hypoxia-inducible factors, such as HIF1alpha. Consistent with its role as a biologically relevant partner of circadian and hypoxia factors, this protein is coexpressed in regions of the brain such as the thalamus, hypothalamus, and amygdala. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Oct 2011]

basic helix-loop-helix ARNT like 1

The protein encoded by this gene is a basic helix-loop-helix protein that forms a heterodimer with CLOCK. This heterodimer binds E-box enhancer elements upstream of Period (PER1, PER2, PER3) and Cryptochrome (CRY1, CRY2) genes and activates transcription of these genes. PER and CRY proteins heterodimerize and repress their own transcription by interacting in a feedback loop with CLOCK/ARNTL complexes. Defects in this gene have been linked to infertility, problems with gluconeogenesis and lipogenesis, and altered sleep patterns. The protein regulates interferon-stimulated gene expression and is an important factor in viral infection, including COVID-19. [provided by RefSeq, Oct 2021]