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Int J Oncol. 2009 Aug;35(2):387-91.

CBP-mediated post-translational N-glycosylation of BRCA2.

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Cancer Biology Program, Department of OB/GYN, Morehouse School of Medicine, Georgia Cancer Center for Excellence, Grady Health System, Atlanta, GA 30303, USA.


CREB binding protein (CBP) is a transcriptional cofactor with intrinsic histone acetyl transferase activity (HAT). We have observed that CBP interacts with BRCA2 and mediates post-translational glycosylation of BRCA2. The binding of CBP to the amino-terminal region of BRCA2 is necessary for the glycosylation at residue 272 of BRCA2. Digestion with peptide N-glycosidase F indicates that the glycosylation of BRCA2 is N-linked. It is possible that this novel CBP-mediated post-translational N-glycosylation activity alters the conformation of CBP-interacting proteins, leading to regulation of gene expression, cell growth and differentiation.

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