Isolation and genetic mapping of four microsatellite repeats from chromosome 3p21 using 40 CEPH pedigrees.

We have isolated and characterized the microsatellite markers D3S1447, D3S1448, D3S1449, and D3S1450, with PIC values of 0.771, 0.644, 0.633, and 0.552, respectively, from a hamster/human chromosome 3 library. By typing 40 CEPH pedigrees with each of these novel markers, we have sublocalized each microsatellite to 3p21 and with multipoint analyses have shown that the likelihood of the order centromere-D3S13-24.24 cM-D3S1450-9.41 cM-D3S1447-7.05 cM-D3F15S2-3 cM-[D3S1448-2.2 cM-D3S1449]-6.13 cM-D3S1100- telomere significantly exceeds any other order (8.0 x 10(3):1). These finely mapped markers will be extremely useful in aiding in the physical characterization of 3p21, which has been implicated in a range of tumor tissues.