PR The steroid hormones and their receptors are involved in the regulation of eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Depending on the isoform, progesterone receptor functions as transcriptional activator or repressor. Isoform A: Ligand-dependent transdominant repressor of steroid hormone receptor transcriptional activity including repression of its isoform B, MR and ER. Transrepressional activity may involve recruitment of corepressor NCOR2. Isoform B: Transcriptional activator of several progesteron-dependent promoters in a variety of cell types. Involved in activation of SRC-dependent MAPK signaling on hormone stimulation. Isoform 4: Increases mitochondrial membrane potential and cellular respiration upon stimulation by progesterone. Belongs to the nuclear hormone receptor family. NR3 subfamily. In reproductive tissues the expression of isoform A and isoform B varies as a consequence of developmental and hormonal status. Isoform A and isoform B are expressed in comparable levels in uterine glandular epithelium during the proliferative phase of the menstrual cycle. Expression of isoform B but not of isoform A persists in the glands during mid-secretory phase. In the stroma, isoform A is the predominant form throughout the cycle. Heterogeneous isoform expression between the glands of the endometrium basalis and functionalis is implying region-specific responses to hormonal stimuli. 5 human isoforms generated by alternative promoter usage or alternative splicing have been reported. Note: This description may include information from UniProtKB.
Protein type: DNA-binding; Nuclear receptor; Transcription factor
Cellular Component:  chromatin; cytosol; nuclear matrix; nucleus; plasma membrane; protein-DNA complex; receptor complex
Molecular Function:  ATPase binding; chromatin DNA binding; DNA-binding transcription activator activity, RNA polymerase II-specific; enzyme binding; estrogen response element binding; Hsp70 protein binding; Hsp90 protein binding; identical protein binding; nuclear receptor activity; nuclear steroid receptor activity; steroid hormone binding; transcription coactivator binding; zinc ion binding
Biological Process:  glandular epithelial cell maturation; intracellular steroid hormone receptor signaling pathway; negative regulation of gene expression; ovulation from ovarian follicle; paracrine signaling; positive regulation of transcription by RNA polymerase II; progesterone receptor signaling pathway; regulation of epithelial cell proliferation; regulation of transcription by RNA polymerase II; response to estrogen; response to progesterone
Reference #:  P07812 (UniProtKB)
Alt. Names/Synonyms: NR3C3; PGR; PR; PRGR; Progesterone receptor
Gene Symbols: PGR
Molecular weight: 85,744 Da
Basal Isoelectric point: 5.07  Predict pI for various phosphorylation states
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Protein Structure Not Found.

Cross-references to other databases:  AlphaFold  |  STRING  |  Pfam  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene  |  NURSA