共查询到20条相似文献,搜索用时 31 毫秒
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Cheryl Frankfater Erika Maus Krisztina Gaal Fernando Segade Neal G. Copeland Debra J. Gilbert Nancy A. Jenkins J. Michael Shipley 《Mammalian genome》2000,11(3):191-195
A 1.4-kb EST clone encoding mouse microfibril-associated glycoprotein-2 (MAGP-2), identified by its similarity with the reported
human cDNA, was used to screen a mouse 129 genomic bacterial artificial chromosome (BAC) library. The mouse gene contains
10 exons spanning 16 kb, located on the distal region of Chromosome (Chr) 6. The exons range in size from 24 to 963 bp, with
the ATG located in exon 2. The tenth and largest exon contains 817 bp of 3′ untranslated sequence, including a B2 repetitive
element. Northern analysis demonstrates abundant expression of MAGP-2 mRNA in skeletal muscle, lung, and heart. Sequence analysis
of additional cDNA clones suggests that the two mRNA forms of MAGP-2 in the mouse arise from alternative polyadenylation site
usage. The promoter does not contain an obvious TATA box, and the sequence surrounding the start site does not conform to
the consensus for an initiator promoter element. Additionally, the mouse promoter contains 22 copies of a CT dinucleotide
repeat sequence located ∼155 bp 5′ to exon 1.
Received: 27 August 1999 / Accepted: 2 November 1999 相似文献
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Induction of senescence-like phenotypes by forced expression of hic-5, which encodes a novel LIM motif protein, in immortalized human fibroblasts. 总被引:1,自引:1,他引:0
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M Shibanuma E Mochizuki R Maniwa J Mashimo N Nishiya S Imai T Takano M Oshimura K Nose 《Molecular and cellular biology》1997,17(3):1224-1235
The hic-5 gene encodes a novel protein with Zn finger-like (LIM) motifs, the expression of which increases during cellular senescence. The ectopic expression of hic-5 in nontumorigenic immortalized human fibroblasts, whose expression levels of hic-5 were significantly reduced in comparison with those of mortal cells, decreased colony-forming efficiency. Stable clones expressing high levels of hic-5 mRNA showed higher levels of mRNAs for several extracellular matrix-related proteins, along with the alteration of an alternative splicing as seen in senescent cells and decreased c-fos inducibility. Furthermore, these clones acquired a senescence-like phenotype, such as growth retardation; senescence-like morphology; and increased expression of Cip1/WAF1/sdi1 after 20 to 40 population doublings. On the other hand, antisense RNA expression of hic-5 in human normal diploid fibroblasts delayed the senescence process. HIC-5 was localized in nuclei and had affinity for DNA. Based on these observations, we speculated that HIC-5 affected the expression of senescence-related genes through interacting with DNA and thereby induced the senescence-like phenotypes. To our knowledge, hic-5 is the first single gene that could induce senescence-like phenotypes in a certain type of immortalized human cell and mediate the normal process of senescence. 相似文献
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Structure of the mouse beta Fc gamma receptor II gene. 总被引:6,自引:0,他引:6
P M Hogarth E Witort M D Hulett C Bonnerot J Even W H Fridman I F McKenzie 《Journal of immunology (Baltimore, Md. : 1950)》1991,146(1):369-376
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Ogura K Choudhuri S Klaassen CD 《Biochemical and biophysical research communications》2001,281(2):431-439
cDNAs that code for mouse organic anion transporting polypeptide 2 (oatp2) have been cloned. At least three forms of mouse oatp2 cDNAs containing the same coding sequence were isolated. The common coding sequence is for a protein of 670 amino acids with 12 putative transmembrane domains. The deduced amino acid sequence of the mouse oatp2 shares 89% identity with the reported rat oatp2. Cloning and analysis of mouse oatp2 gene indicates that these isoforms are alternatively spliced products from the same gene. Heterogeneity was observed in the 5'-untranslated region of the cDNAs. Two of the three isoforms lacked the noncoding exon 3 sequence. Northern-blot hybridization analysis using the exon 3-specific probes demonstrated that mouse oatp2 mRNA containing exon 3 sequence is expressed in heart and lung, whereas exon 1-, 2-, and 17-specific probes detected mRNA only in brain and liver. The mouse oatp2 gene consists of 17 exons, including three noncoding exons, and 16 introns. All of the introns are flanked by GT-AG splice sequences except for intron 10 that is flanked by GC-AG splice sequence. 相似文献
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Tsukamoto H Takizawa T Takamori K Ogawa H Araki Y 《Molecular reproduction and development》2007,74(2):154-162
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Structure of the human laminin B1 chain gene 总被引:8,自引:0,他引:8
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