The genomic organization of the mouse CD94 C‐type lectin gene

The mouse natural killer (NK) gene complex is located on chromosome 6 and contains a number of genes encoding C‐type lectin receptors which have been found to regulate NK cell function. Among these are CD94 and four NKG2 genes. Like its human counterpart, the mouse CD94 protein associates with different NKG2 isoforms and recognizes the atypical MHC class I molecule Qa‐1^b. Here, the genomic organization of the mouse CD94 gene was determined by analysing a BAC clone containing the CD94 gene. The mouse CD94 gene contains six exons separated by five introns. Exons I and II encode the 5′ untranslated region (UTR) and the transmembrane domain. Exon III encodes the stalk region and exons IV–VI encode the carbohydrate recognition domain (CRD). Furthermore, we cloned and sequenced the CD94 promoter region, and putative regulatory DNA elements were identified. Further studies on the CD94 promoter region may help to elucidate the restricted expression pattern of CD94 in NK cells and a subpopulation of T cells.     

The genomic organization of the mouse CD94 C-type lectin gene.

The mouse natural killer (NK) gene complex is located on chromosome 6 and contains a number of genes encoding C-type lectin receptors which have been found to regulate NK cell function. Among these are CD94 and four NKG2 genes. Like its human counterpart, the mouse CD94 protein associates with different NKG2 isoforms and recognizes the atypical MHC class I molecule Qa-1b. Here, the genomic organization of the mouse CD94 gene was determined by analysing a BAC clone containing the CD94 gene. The mouse CD94 gene contains six exons separated by five introns. Exons I and II encode the 5' untranslated region (UTR) and the transmembrane domain. Exon III encodes the stalk region and exons IV-VI encode the carbohydrate recognition domain (CRD). Furthermore, we cloned and sequenced the CD94 promoter region, and putative regulatory DNA elements were identified. Further studies on the CD94 promoter region may help to elucidate the restricted expression pattern of CD94 in NK cells and a subpopulation of T cells.     

组织特异性表达基因PLUNC调控元件的生物信息学分析

目的分析组织特异性表达基因PLUNC的调控元件。方法采用进化足迹法,结合生物信息学工具,预测PLUNC基因的顺式作用元件和反式作用因子。结果预测的PLUNC基因的转录起始位点位于-1～＋10bp区域间、-29bp存在TATA盒子,启动子集中在-490bp～＋89bp内,在人和小鼠PLUNC基因的启动子保守区内存在29个共同的转录因子结合部位及5个增强子。结论PLUNC基因调控元件的分析可为探讨上呼吸道特异性表达基因的调控机制提供模型。生物信息学技术结合进化足迹法,在基因表达调控机制的研究中具有重要的应用价值。     

Chromosomal localization and complete genomic sequence of the murine autoimmune regulator gene (Aire)

We have recently cloned the murine autoimmune regulator (Aire) gene, the homologue of human AIRE responsible for the autoimmune polyglandular syndrome type 1 (APS1) or autoimmune polyendocrinopathy candidiasis ectodermal dystrophy (APECED). Here, we report the genomic sequence (18,413 bp) for the entire Aire gene and its 5' flanking region, which contains putative regulatory sequences. Comparison of the genomic and cDNA sequences indicates that the Aire gene is composed of 14 exons and the coding sequence shares high similarities between mouse and human. The sizes of the homologous introns in the two species are conserved; however, the introns do not share significant sequence homologies except the sequences near the splice donor and acceptor sites. Sequence analyses of the 5' regulatory region and the complete coding region in three mouse strains (B6, NOD and SJL) did not reveal any sequence variation, suggesting sequence conservation between different inbred mouse strains. Using one of the six microsatellite markers identified by genomic sequencing and a B6 x Cast backcross mapping panel, we mapped the mouse Aire gene to chromosome 10, a syntenic region containing the Cdl18 and Pfkl genes on human chromosome 21q22.