G1/S-specific cyclin-D2
Definition:
Regulatory component of the cyclin D2-CDK4 (DC) complex that phosphorylates and inhibits members of the retinoblastoma (RB) protein family including RB1 and regulates the cell-cycle during G(1)/S transition. Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complex and the subsequent transcription of E2F target genes which are responsible for the progression through the G(1) phase. Hypophosphorylates RB1 in early G(1) phase. Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals.
References:
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[1]. M Meyerson, et al. Identification of G1 kinase activity for cdk6, a novel cyclin D partner. Mol Cell Biol. 1994 Mar;14(3):2077-86. [Content Brief]
[2]. Zizhang Wang, et al. Migratory localization of cyclin D2-Cdk4 complex suggests a spatial regulation of the G1-S transition. Cell Struct Funct. 2008;33(2):171-83. [Content Brief]
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