NHLH2
Function
Transcription factor which binds the E box motif 5'-CA[TC][AG]TG-3'. Involved in regulating energy expenditure, body mass, voluntary physical activity, mating behavior and reproductive longevity, acting through the hypothalamic-pituitary-gonadal axis. Acts as a transcriptional activator of target genes, including NDN, PCSK1, MC4R (By similarity). Is also a transcriptional activator of KISS1 (PubMed:35066646). May act centrally to regulate function of both white and brown adipose tissue. Together with NHLH1, required to maintain migration and survival of cells in the anterior extramural migration stream (aes), which forms the precerebellar nuclei. Also, in concert with NHLH1, may determine fate of gonadotropin releasing hormone-1 (GnRH-1) neurons.
Involvement in disease
Hypogonadotropic hypogonadism 27 without anosmia
HH27
A form of hypogonadotropic hypogonadism, a group of disorders characterized by absent or incomplete sexual maturation by the age of 18 years, in conjunction with low levels of circulating gonadotropins and testosterone, and no other abnormalities of the hypothalamic-pituitary axis. In some cases, it is associated with non-reproductive phenotypes, such as anosmia, cleft palate, and sensorineural hearing loss. Anosmia or hyposmia is related to the absence or hypoplasia of the olfactory bulbs and tracts. In the presence of anosmia, idiopathic hypogonadotropic hypogonadism is referred to as Kallmann syndrome, whereas in the presence of a normal sense of smell, it has been termed normosmic idiopathic hypogonadotropic hypogonadism (nIHH). HH27 is an autosomal recessive normosmic form characterized by lack of pubertal development associated with onset of obesity in early adolescence.
None
The disease may be caused by variants affecting the gene represented in this entry.
Cellular localization
- Nucleus
Alternative names
BHLHA34, HEN2, KIAA0490, NHLH2, Helix-loop-helix protein 2, HEN-2, Class A basic helix-loop-helix protein 34, Nescient helix loop helix 2, bHLHa34, NSCL-2