NCIt definition : G1/S-specific cyclin-D1 (295 aa, 34 kDa) is encoded by the human CCND1 gene. This
protein is involved in the regulation of the G1/S transition of the cell cycle.;
NCIt note : Essential for control of the G1/S transition, cyclin D1 interacts with CDK4 and CDK6
to form a serine/threonine kinase holoenzyme and imparts substrate specificity to
the complex. RB regulates cyclin D1 gene expression. Cyclin D1 expression may identify
Barrett's esophagus patients at high risk for esophageal carcinoma; risk of progression
to adenocarcinoma exhibits an odds ratio of 6.85. The BCL1 and PRAD1 oncogenes involve
cyclin D1 gene translocations. (J Natl Cancer Inst 2000. 92:1282 & 1316, SWISS-PROT,
OMIM);