FUNCTION This is a receptor for the anterior pituitary hormone prolactin (PRL). Acts as a prosurvival factor for spermatozoa by inhibiting sperm capacitation through suppression of SRC kinase activation and stimulation of AKT. Isoform 4 is unable to transduce prolactin signaling. Isoform 6 is unable to transduce prolactin signaling.SUBUNIT Homodimer upon hormone binding. Interacts with SMARCA1. Interacts with GH1. Interacts with CSH. Interacts with NEK3 and VAV2 and this interaction is prolactin-dependent.INTERACTION Expressed in breast, placenta, kidney, liver and pancreas.DOMAIN The WSXWS motif appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding.DOMAIN The box 1 motif is required for JAK interaction and/or activation.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.MISCELLANEOUS Soluble isoform that appears specific for the BT-474 breast cancer cell line.MISCELLANEOUS Includes exon 11. Does not transduce prolactin signaling.MISCELLANEOUS Produced by deletion of part of exon 10 and frameshift.MISCELLANEOUS Does not transduce prolactin signaling.MISCELLANEOUS Splices from exon 7 to exon 11.MISCELLANEOUS SF1b with deletion of exon 4. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay.SIMILARITY Belongs to the type I cytokine receptor family. Type 1 subfamily.
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