Differential Expression of an Acidic Domain in the Amino-terminal Propeptide of Mouse Pro-2(XI) Collagen by Complex Alternative Splicing (*)

Differential Expression of an Acidic Domain in the Amino-terminal Propeptide of Mouse Pro-2(XI) Collagen by Complex Alternative Splicing (*)
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小鼠 Pro-2(XI) 胶原蛋白氨基末端前肽中酸性结构域通过复杂选择性剪接的差异表达 (*)

DOI:
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发表时间:
1995
影响因子:
4.8
通讯作者:
T. Kimura
T. Kimura
中科院分区:
生物学2区
文献类型:
--
作者:
N. Tsumaki;T. Kimura

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我们分离并测序了小鼠前α-2(XI)胶原基因的完整氨基末端部分和5‘-非翻译区的基因组和cDNA克隆。编码氨基末端前肽的14个外显子被分为三个连续的结构域(长球形结构域、氨基末端三螺旋结构域和端肽结构域)。与前α1(V)和前α1(XI)胶原氨基末端蛋白一样,长球形结构域进一步分为上游碱性亚区和下游高酸性亚区。我们还证明了初级转录本经历了复杂的选择性剪接。编码大部分酸性亚区的三个连续外显子(外显子6、7和8)显示了选择性剪接,这极大地影响了前α2(XI)胶原氨基末端前肽的结构。利用逆转录聚合酶链式反应,我们分析了这些外显子在不同组织和发育中的小鼠肢芽中的表达。软骨中含有丰富的前α2(XI)转录本,但大多数转录本缺乏编码酸性结构域的3-外显子序列。大多数其他组织也含有与更长的剪接变体相对应的mRNAs,包括外显子6-8。前胶原2(Pro-α2,XI)特定结构域的差异表达可能在调节细胞外基质不同成分之间的相互作用和/或可能影响异型胶原组装方面发挥重要作用。
We isolated and sequenced genomic and cDNA clones encoding the complete amino-terminal portion and the 5′-untranslated region of mouse pro-α2(XI) collagen mRNA. Fourteen exons encoded the amino-terminal propeptide, which was divided into three consecutive domains (a long globular domain, an amino-terminal triple helical domain, and a telopeptide domain). The long globular domain was further divided into an upstream basic subdomain and a downstream highly acidic subdomain, as is the case for the amino-terminal propeptides of pro-α1(V) and pro-α1(XI) collagens. We also demonstrated that the primary transcript undergoes complex alternative splicing. Three consecutive exons (exons 6, 7, and 8) encoding most of the acidic subdomain showed alternative splicing which dramatically affected the structure of the amino-terminal propeptide of pro-α2(XI) collagen. Using the reverse transcription-polymerase chain reaction, we analyzed the expression of these exons in various tissues and in developing limb buds of mice. The pro-α2(XI) transcripts were abundant in cartilage, but most of them lacked the 3-exon sequences encoding the acidic domain. Most of other tissues also contained mRNAs that corresponded to longer splice variants, including exons 6-8. The differential expression of specific domains of pro-α2(XI) collagen may be important in modulating interactions between various components of the extracellular matrix and/or may influence heterotypic collagen assembly.
胚胎鸡胸骨中 XI 型胶原的生物合成和蛋白水解加工。
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Thom,JR;Morris,NP
通讯作者: Morris,NP
DOI: 10.1017/s0424820100142670
发表时间: 1990-04
影响因子: 4
作者:
D. Birk;J. Fitch;J. Babiarz;K. Doane;T. Linsenmayer
通讯作者: D. Birk;J. Fitch;J. Babiarz;K. Doane;T. Linsenmayer
鸡 α1 (XI) 胶原蛋白基因在胚胎组织中广泛表达。
DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
作者:
Nah,HD;Barembaum,M;Upholt,WB
通讯作者: Upholt,WB
牛血管平滑肌细胞中 α 1(XI) 和 α 2(V) 胶原蛋白 mRNA 的协同调节。
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Brown,KE;Lawrence,R;Sonenshein,GE
通讯作者: Sonenshein,GE
DOI: 10.1016/s0021-9258(18)54517-8
发表时间: 1991-12
期刊: The Journal of biological chemistry
影响因子: --
作者:
Hyun-Duck Nah;W. B. Upholt
通讯作者: Hyun-Duck Nah;W. B. Upholt