Cyclin E1/CCNE1 (CCNE1) Antibody – Mouse Monoclonal

The protein encoded by this gene belongs to the highly conserved cyclin family, whose members are characterized by a dramatic periodicity in protein abundance through the cell cycle. Cyclins function as regulators of CDK kinases. Different cyclins exhibit distinct expression and degradation patterns which contribute to the temporal coordination of each mitotic event. This cyclin forms a complex with and functions as a regulatory subunit of CDK2, whose activity is required for cell cycle G1/S transition. This protein accumulates at the G1-S phase boundary and is degraded as cells progress through S phase. Overexpression of this gene has been observed in many tumors, which results in chromosome instability, and thus may contribute to tumorigenesis. This protein was found to associate with, and be involved in, the phosphorylation of NPAT protein (nuclear protein mapped to the ATM locus), which participates in cell-cycle regulated histone gene expression and plays a critical role in promoting cell-cycle progression in the absence of pRB. Two alternatively spliced transcript variants of this gene, which encode distinct isoforms, have been described. Two additional splice variants were reported but detailed nucleotide sequence information is not yet available. [provided by RefSeq, Jul 2008]

CCNE1: a member of the highly conserved cyclin family, whose members are characterized by a dramatic periodicity in protein abundance through the cell cycle. Cyclins function as regulators of CDK kinases. Forms a complex with and functions as a regulatory subunit of CDK2, whose activity is required for cell cycle G1/S transition. Accumulates at the G1-S phase boundary and is degraded as cells progress through S phase. Two alternatively spliced isoforms have been described.

Protein type: Nuclear receptor co-regulator; Activator; Cell cycle regulation

Chromosomal Location of Human Ortholog: 19q12

Cellular Component: nucleoplasm; cyclin-dependent protein kinase holoenzyme complex; nucleus; cytosol

Molecular Function: protein binding; androgen receptor binding; transcription coactivator activity; kinase activity; cyclin-dependent protein kinase regulator activity; protein kinase binding

Biological Process: G1/S-specific transcription in mitotic cell cycle; Wnt receptor signaling pathway; DNA replication initiation; cell division; regulation of cell cycle; positive regulation of transcription, DNA-dependent; androgen receptor signaling pathway; mitotic cell cycle; regulation of protein kinase activity; protein amino acid phosphorylation; G1/S transition of mitotic cell cycle