CHARACTERIZATION OF THE MOUSE REP-3 GENE - SEQUENCE SIMILARITIES TO BACTERIAL AND YEAST MISMATCH-REPAIR PROTEINS

被引:18
作者
LIU, K [1 ]
NIU, LM [1 ]
LINTON, JP [1 ]
CROUSE, GF [1 ]
机构
[1] EMORY UNIV, DEPT BIOL, ATLANTA, GA 30322 USA
关键词
RECOMBINANT DNA; LAMBDA PHAGE LIBRARY; DNA REPAIR; SPLICING; NUCLEOTIDE-BINDING SITE; MUTS; RECOMBINATION;
D O I
10.1016/0378-1119(94)90062-0
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The mouse Rep-3 gene is transcribed divergently from the same promoter region as the dihydrofolate reductase-encoding gene and has a deduced amino-acid sequence that shares identity with the bacterial protein, MutS, which is involved in DNA mismatch repair. We have cloned Rep-3, mapped it and sequenced all of the known exons and their intron junction sequences. We find that the open reading frame is considerably larger than initially reported and that the most abundant form of Rep-3 mRNA encodes a protein of 123 kDa. The gene spans at least 134 kb and consists of 26 exons, including several alternatively spliced exons. All of the exon/intron junctions match the expected consensus sequences with the exception of the splice junctions for intron 6, which has AT and AC dinucleotides instead of the usual GT and AG bordering the exon sequences. The junction sequences for this intron shape consensus sequences with three intron sequences from other genes, thereby helping to establish an alternative consensus sequence.
引用
收藏
页码:169 / 177
页数:9
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