Cyclin-Dependent Kinase Inhibitor 1b (CDKN1B) Human Recombinant Protein

This gene encodes a cyclin-dependent kinase inhibitor, which shares a limited similarity with CDK inhibitor CDKN1A/p21. The encoded protein binds to and prevents the activation of cyclin E-CDK2 or cyclin D-CDK4 complexes, and thus controls the cell cycle progression at G1. The degradation of this protein, which 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. Mutations in this gene are associated with multiple endocrine neoplasia type IV (MEN4). [provided by RefSeq, Apr 2014]

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: Oncoprotein; Inhibitor; Cell cycle regulation; Protein kinase, regulatory subunit

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: negative regulation of kinase activity; response to peptide hormone stimulus; 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; negative regulation of phosphorylation; innate immune response; mitotic cell cycle; negative regulation of cell growth; regulation of cyclin-dependent protein kinase activity; negative regulation of transcription, DNA-dependent; negative regulation of apoptosis; G1/S transition of mitotic cell cycle

Disease: Multiple Endocrine Neoplasia, Type Iv