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Widmark, E. et al.

Family relationships of murine major histocompatibility complex class I genes. Sequence of the T2Aa pseudogene, a member of gene family 3.

The major histocompatibility complex of the mouse contains numerous class I genes, most of which are encoded in the Qa and Tla regions. By hybridizations, the murine class I genes have been classified into three major families (Rogers, J. H. (1985a) Immunogenetics 21, 343-353). As yet, complete sequences are available only for members of family 1 (several H-2 and Qa genes) or family 2 (the pseudoallelic Tla genes T3b and T13c). We here present the complete nucleotide sequence of a gene from the Tla region that belongs to family 3. This gene, T2Aa, is a pseudogene by several criteria. The general structure of the gene is nonetheless well preserved. A comparison of the T2Aa sequence to those of other murine class I genes confirms the classification into three gene families. Members of gene families 2 and 3, located in the Tla region, are no more similar to each other than to family 1 (the H-2 and Qa2,3 genes). This suggests that families 2 and 3 were both created by ancient duplications of the functionally important family 1 genes. The fact that families 2 and 3 have diverged extensively both from family 1 and from each other may suggest that they are devoid of function.[1]

References

Family relationships of murine major histocompatibility complex class I genes. Sequence of the T2Aa pseudogene, a member of gene family 3. Widmark, E., Ronne, H., Hammerling, U., Servenius, B., Larhammar, D., Gustafsson, K., Böhme, J., Peterson, P.A., Rask, L. J. Biol. Chem. (1988) [Pubmed]

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