Related Experiment Video
Updated: Aug 29, 2026

Analysis of Cell Cycle Position in Mammalian Cells
Published on: January 21, 2012
Inhibition of G1 to S cell cycle progression by BCCIP beta
Xiangbing Meng1, Jingmei Liu, Zhiyuan Shen
1Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque, New Mexico 87131-0001, USA.
Abstract:
The BCCIP alpha protein was identified as a BRCA2 and CDKN1A (p21, or p21(Waf1/Cip1)) Interacting Protein. It binds to a highly conserved domain proximate to the C-terminus of BRCA2 protein and the C-terminal domain of the CDK-inhibitor p21. Previous reports showed that BCCIP alpha enhances the inhibitory activity of p21 toward CDK2 and that BCCIP alpha inhibits the growth of certain tumor cells. Here we show that a second isoform, BCCIP beta, also binds to p21 and inhibits cell growth. The growth inhibition by BCCIP beta can be partially abrogated in p21 deficient cells. Overexpression of BCCIP beta delays the G1 to S progression and results in an elevated p21 expression. These data suggest BCCIP beta as a new regulator for the G1-S cell cycle progression and cell growth control.
More Related Videos
Related Concept Videos
Inhibition of Cdk Activity
Inhibition of CDK Activity
Negative Regulator Molecules
The Cell Cycle Control System
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
The Cell Cycle Control System
Positive Regulator Molecules

