Sex steroid nuclear hormone receptor (NR3)

Sex steroid nuclear hormone receptors are a subfamily of ligand-activated transcription factors that mediate the biological effects of sex steroids, including estrogens, androgens, and progestins [UniProt: P03372, P04150, P06401]. This group primarily consists of the androgen receptor (AR), estrogen receptors (ER-alpha and ER-beta), and the progesterone receptor (PR), all belonging to the NR3 subfamily of the nuclear receptor superfamily [NCBI: NBK279123]. Upon ligand binding, these receptors undergo conformational changes, dissociate from chaperone proteins, dimerize, and translocate to the nucleus where they bind to specific hormone response elements (HREs) on DNA [PubMed: 11448725]. This interaction recruits various co-regulatory proteins to modulate the transcription of target genes involved in reproductive development, sexual differentiation, and cellular growth [PubMed: 11448725]. These receptors are critical therapeutic targets in hormone-dependent diseases, particularly breast and prostate cancers, where their signaling pathways are often hijacked to drive tumor progression [PubMed: 12019213]. Pharmacological strategies include the use of agonists for hormone replacement, antagonists to block growth signals, and selective receptor modulators that exhibit tissue-specific activities [PubMed: 11773601].

Other names

Sex hormone receptorGonadal steroid receptorSex-steroid receptorNR3 subfamily receptors

Ligand-activated transcription factor modulation, including agonism, antagonism, and selective receptor modulation (SERMs, SARMs, SPRMs) [PubMed: 11448725].