Journal of Experimental Medicine, Vol 162, 1588-1602, Copyright © 1985 by Rockefeller University Press

ARTICLES

Molecular basis of the dm1 mutation in the major histocompatibility complex of the mouse: a D/L hybrid gene

YH Sun, RS Goodenow and L Hood

The H-2dm1 mutation is unique among all described H-2 mutations in that two transplantation antigens, the H-2Dd and the H-2Ld, are affected. Here, we show that the mutant gene, Ddm1, is formed by fusion of the 5' part of the Dd gene and the 3' part of the Ld gene, with the region in between deleted. The recombination junction is located in the third exon, which encodes the alpha 2 region of the protein. When the hybrid gene is transfected into mouse L cells, serological and biochemical analyses indicate the Ddm1 antigen expressed in the transformant line is identical to the mutant molecule in dm1 spleen cells. These results demonstrate that the D/L hybrid gene is most likely responsible for the dm1 mutant phenotype.
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This article has been cited by other articles:

• Yun, T. J., Melvold, R. W., Pease, L. R. (1997). A complex major histocompatibility complex D locus variant generated by an unusual recombination mechanism in mice. Proc. Natl. Acad. Sci. USA 94: 1384-1389 [Abstract] [Full Text]  

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