Modular Arrangement of Cartilage- and Neural Tissue-specificcis-Elements in the Mouse α2(XI) Collagen Promoter*

Modular Arrangement of Cartilage- and Neural Tissue-specificcis-Elements in the Mouse α2(XI) Collagen Promoter*
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小鼠 α2(XI) 胶原蛋白启动子中软骨和神经组织特异性顺式元件的模块化排列*

DOI:
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发表时间:
1998
影响因子:
4.8
通讯作者:
Y. Yamada
Y. Yamada
中科院分区:
生物学2区
文献类型:
--
作者:
N. Tsumaki;T. Kimura;Kazuhiro Tanaka;J. Kimura;T. Ochi;Y. Yamada

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XI型胶原是软骨基质特异性的异源三聚体,在软骨形态发生中起重要作用。我们在转基因小鼠中分析了各种α2(XI)胶原启动子-lacZ报告基因构建体,以了解组织特异性转录调控。-530启动子序列足以指导报告基因特异性表达软骨。进一步删除到-500消除了软骨中的报告基因表达,但激活了神经组织(如脑和神经管)特异性的表达。一个额外的47个碱基对缺失导致随机组织表达模式。α2(XI)启动子的-530到-507的24个碱基对序列能够将异源神经丝轻基因启动子的活性从神经组织转换到软骨。这些结果表明,α2(XI)胶原蛋白基因至少受三个模块元件的调控:一个位于-453远端的基础启动子序列,一个神经组织特异性元件(-454到-500)和一个软骨特异性元件(-501到-530),它抑制神经组织中的表达并诱导软骨中的表达。
Type XI collagen, a heterotrimer specific to cartilage matrix, plays an important role in cartilage morphogenesis. We analyzed various α2(XI) collagen promoter-lacZreporter gene constructs in transgenic mice to understand tissue-specific transcriptional regulation. The −530 promoter sequence was sufficient to direct reporter gene expression specifically to cartilage. Further deletion to −500 abolished reporter gene expression in cartilage but activated the expression specific to neural tissues such as brain and neural tube. An additional 47-base pair deletion resulted in random tissue expression patterns. A 24-base pair sequence from −530 to −507 of the α2(XI) promoter was able to switch the activity of the heterologous neurofilament light gene promoter from neural tissues to cartilage. These results suggest that the α2(XI) collagen gene is regulated by at least three modular elements: a basal promoter sequence distal to −453, a neural tissue-specific element (−454 to −500), and a cartilage-specific element (−501 to −530), which inhibits expression in neural tissues and induces expression in cartilage.
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Kimura,T;Cheah,KS;Chan,SD;Lui,VC;Mattei,MG;vanderRest,M;Ono,K;Solomon,E;Ninomiya,Y;Olsen,BR
通讯作者: Olsen,BR
pro-alpha 1 (XI) 胶原蛋白 cDNA 的克隆和测序表明,XI 型属于纤维状胶原蛋白,并揭示该基因的表达并不限于软骨组织。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Bernard,M;Yoshioka,H;Rodriguez,E;VanderRest,M;Kimura,T;Ninomiya,Y;Olsen,BR;Ramirez,F
通讯作者: Ramirez,F