The Vin-1 gene was initially identified as a gene whose expression is
altered by the integration of proviruses in the Vin-1 common site of i
ntegration in retrovirus-induced rodent T-cell leukemias. We have now
isolated the Vin-1 cDNA. Sequencing of the Vin-1 cDNA and Vin-1 exons
revealed that the proviruses are integrated at the 5' end of the Vin-1
gene in an inverse transcriptional orientation. The sequence of the V
in-1 gene is identical to that of the recently identified G1-phase cyc
lin D2 gene. The human homolog of the Vin-1/cyclin D2 gene (CCND2) was
mapped to chromosome 12, band p13.3, by in situ hybridization, confir
ming previous mapping data. Our results strongly support a role of the
cyclin D2 gene in oncogenesis and thereby implicate altered cell cycl
e regulation in transformation.