p27Kip1: a cell-cycle regulatory protein that Interacts with cyclin-CDK2 and -CDK4, inhibiting cell cycle progression at G1. May mediate TGF beta-induced g1 arrest. Its degradation is triggered by its CDK dependent phosphorylation and subsequent ubiquitination by SCF complexes, is required for the cellular transition from quiescence to the proliferative state.
Protein type: Inhibitor; Protein kinase, regulatory subunit; Oncoprotein; Cell cycle regulation
Chromosomal Location of Human Ortholog: 12p13.1-p12
Cellular Component: nucleoplasm; cytoplasm; nucleus; cytosol; endosome
Molecular Function: cyclin-dependent protein kinase inhibitor activity; protein binding; chaperone binding; protein complex binding; Hsp70 protein binding; caspase activator activity; protein phosphatase binding; transforming growth factor beta receptor, cytoplasmic mediator activity
Biological Process: response to peptide hormone stimulus; negative regulation of kinase activity; nerve growth factor receptor signaling pathway; positive regulation of microtubule polymerization; DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest; response to estradiol stimulus; negative regulation of cell proliferation; sensory perception of sound; positive regulation of cell proliferation; response to glucose stimulus; negative regulation of mitotic cell cycle; cell cycle arrest; inner ear development; potassium ion transport; response to drug; caspase activation; epidermal growth factor receptor signaling pathway; fibroblast growth factor receptor signaling pathway; phosphoinositide-mediated signaling; negative regulation of cyclin-dependent protein kinase activity; negative regulation of cell motility; response to amino acid stimulus; response to cadmium ion; response to hypoxia; positive regulation of protein catabolic process; autophagic cell death; innate immune response; negative regulation of phosphorylation; negative regulation of cell growth; regulation of cyclin-dependent protein kinase activity; mitotic cell cycle; negative regulation of transcription, DNA-dependent; G1/S transition of mitotic cell cycle; negative regulation of apoptosis
Disease: Multiple Endocrine Neoplasia, Type Iv
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