Genetic mapping of Cmv1 in the region of mouse chromosome 6 encoding the NK gene complex-associated loci Ly49 and musNKR-P1
- PMID: 7558024
- DOI: 10.1006/geno.1995.1074
Genetic mapping of Cmv1 in the region of mouse chromosome 6 encoding the NK gene complex-associated loci Ly49 and musNKR-P1
Abstract
The Cmv1 resistance gene controls splenic replication of murine cytomegalovirus (MCMV) and confers natural killer (NK) cell-mediated resistance to otherwise lethal infection. The Cmv1 phenotypes of 13 inbred mouse strains have been assessed, and it was found that the Cmv1r resistance phenotype was restricted to the C57BL/6J and Ma/MyJ strains. We have further analyzed the linkage of Cmv1 to the NK gene complex (NKC) mapping to distal mouse chromosome 6 in 99 (BALB/c x C57BL/6J)F1 x BALB/c backcross mice using cloned gene probes and microsatellite markers from this region. No recombinants were observed between Cmv1 and the NKC-associated Ly49 and musNKR-P1 multigene families, nor the Kap locus, nor with 7 microsatellite markers, indicating that Cmv1 is closely linked (< 1 cM) to all of these markers. Analysis of the genotype of the MCMV-susceptible BXD8 RI strain around the NKC region revealed that it had C57BL/6J alleles at microsatellite markers immediately proximal and distal to Cmv1. This suggests that the Cmv1s phenotype of this strain is due to a germ-line mutation. Thus, the close linkage of Cmv1 to the Ly49 and musNKR-P1 multigene families suggests that it may represent an NK cell recognition structure encoded in the NKC region.
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