XB-ART-52647Proc Natl Acad Sci U S A September 1, 1987; 84 (17): 6249-53.
Conserved major histocompatibility complex class II boxes--X and Y--are transcriptional control elements and specifically bind nuclear proteins.
A conserved sequence motif exists at the 5'' end of all major histocompatibility complex class II genes. This motif consists of the 14-base X and Y boxes separated by a short stretch of variable sequence. In this report, we provide evidence that the X and Y boxes play an important role in controlling transcription of the murine class II gene E kappa alpha. We have developed transgenic mouse lines that carry E alpha genes cleanly deleted for either the X or Y box and have compared the expression of these mutant transgenes with that of a nondeleted control. Both the X and Y segments appear critical for accurate and efficient transcription of E kappa alpha. The most drastic effect is seen with gamma-interferon-treated macrophages, where deletion of the Y box completely abrogates transcription initiated by the normal promoter. In addition, we identify proteins from nuclear extracts that bind specifically to the X or Y box.
PubMed ID: 3114745
PMC ID: PMC299048
References [+] :
Auffray, Molecular genetics of the human major histocompatibility complex. 1986, Pubmed