Domain:Composed of three domains: a modulating N-terminal domain , a DNA-binding domain and a C-terminal steroid-binding domain. ,Function:Nuclear hormone receptor. Binds estrogens with an affinity similar to that of ESR1 , and activates expression of reporter genes containing estrogen response elements (ERE) in an estrogen-dependent manner. Isoform beta-cx lacks ligand binding ability and has no or only very low ere binding activity resulting in the loss of ligand-dependent transactivation ability. DNA-binding by ESR1 and ESR2 is rapidly lost at 37 degrees Celsius in the absence of ligand while in the presence of 17 beta-estradiol and 4-hydroxy-tamoxifen loss in DNA-binding at elevated temperature is more gradual. ,online information:Estrogen receptor entry ,similarity:Belongs to the nuclear hormone receptor family. ,similarity:Belongs to the nuclear hormone receptor family. NR3 subfamily. ,similarity:Contains 1 nuclear receptor DNA-binding domain. ,subunit:Binds DNA as a homodimer. Can form a heterodimer with ESR1. Interacts with NCOA3 , NCOA5 and NCOA6 coactivators , leading to a strong increase of transcription of target genes. Interacts with PELP1 and UBE1C. Isoform beta-2/cx preferentially forms a hetereodimer with ESR1 rather than ESR2 and inhibits DNA-binding by ESR1. Interacts with AKAP13. Interacts with DNTTIP2. Interacts with isoform 4 of TXNRD1. ,tissue specificity:Isoform beta-1 is expressed in testis and ovary , and at a lower level in heart , brain , placenta , liver , skeletal muscle , spleen , thymus , prostate , colon , bone marrow , mammary gland and uterus. Also found in uterine bone , breast , and ovarian tumor cell lines , but not in colon and liver tumors. Isoform beta-2 is expressed in spleen , thymus , testis and ovary and at a lower level in skeletal muscle , prostate , colon , small intestine , leukocytes , bone marrow , mammary gland and uterus. Isoform beta-3 is found in testis. Isoform beta-4 is expressed in testis , and at a lower level in spleen , thymus , ovary , mammary gland and uterus. Isoform beta-5 is expressed in testis , placenta , skeletal muscle , spleen and leukocytes , and at a lower level in heart , lung , liver , kidney , pancreas , thymus , prostate , colon , small intestine , bone marrow , mammary gland and uterus. Not expressed in brain. ,
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