Human Mucin Gene MUC5B, the 10.7-kb Large Central Exon Encodes Various Alternate Subdomains Resulting in a Super-repeat

Human Mucin Gene MUC5B, the 10.7-kb Large Central Exon Encodes Various Alternate Subdomains Resulting in a Super-repeat
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人类粘蛋白基因 MUC5B,10.7 kb 大中央外显子编码各种替代子结构域,导致超级重复

DOI:
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发表时间:
1997
影响因子:
4.8
通讯作者:
A. Laine
A. Laine
中科院分区:
生物学2区
文献类型:
--
作者:
J. Desseyn;V. Guyonnet;N. Porchet;J. Aubert;A. Laine

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人类粘蛋白基因MUC5B与MUC6、MUC2、MUC5AC聚集在11p15.5染色体上。我们在这里报道了三个重叠的人类MUC5B基因组克隆的分离,跨越大约40千碱基。我们已经确定了它们的部分限制图和编码单个开放阅读框的中心区域的内含子-外显子边界。该编码区已被完全测序。它的长度为10713个碱基对,编码3570个氨基酸的肽。已经个性化了19个子域。一些子域显示出彼此之间的相似性,形成了更大的复合重复单元,我们称之为超级重复。因此,在中央外显子内观察到528个氨基酸残基的四个超重复。每个子结构域包括(i)一个由29个氨基酸残基的11个不规则重复组成的子结构域,(ii)一个没有典型重复的独特保守子结构域,以及(iii)一个富含半胱氨酸的子结构域。后一个亚结构域与MUC2和MUC5AC中描述的富含半胱氨酸的结构域具有高度的序列相似性。这三个基因的序列数据,连同它们的集群组织,使我们认为它们可能是一个多基因家族的一部分。MUC5B中存在的超重复序列是粘蛋白基因中最大的,该基因的中心外显子是迄今为止报道的脊椎动物基因中最大的。
Human mucin gene MUC5B is mapped clustered with MUC6, MUC2, and MUC5AC on chromosome 11p15.5. We report here the isolation of three overlapping genomic clones of human MUC5B spanning approximately 40 kilobases. We have determined their partial restriction maps and the intron-exon boundaries of the central region encoding a single open reading frame. This coding region has been completely sequenced. Its length is 10,713 base pairs, and it encodes a 3570-amino acid peptide. Nineteen subdomains have been individualized. Some subdomains show similarity to each other, creating larger composite repeat units that we have called super-repeats. Four super-repeats of 528 amino acid residues are thus observed within the central exon. Each comprises (i) a subdomain composed of 11 repeats of the irregular repeat of 29 amino acid residues, (ii) a unique conserved subdomain with no typical repeat, and (iii) a cysteine-rich subdomain. This latter subdomain has high sequence similarity to the cysteine-rich domains described in MUC2 and MUC5AC. Sequence data of these three genes, together with their clustered organization, lead us to suggest that they may be a part of a multigene family. The super-repeat present in MUC5B is the largest ever determined in mucin genes and the central exon of this gene is, by far, the largest reported for a vertebrate gene.
DOI: --
发表时间: 1993-09
期刊: The Journal of biological chemistry
影响因子: --
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发表时间: 1984
期刊: European journal of biochemistry
影响因子: --
作者:
Slayter,HS;Lamblin,G;LeTreut,A;Galabert,C;Houdret,N;Degand,P;Roussel,P
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期刊: The Biochemical journal
影响因子: --
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期刊: The Journal of biological chemistry
影响因子: --
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DOI: 10.1006/bbrc.1995.2884
发表时间: 1995
期刊: Biochemical and biophysical research communications.
影响因子: --
作者:
Troxler,RF;Offner,GD;Zhang,F;Iontcheva,I;Oppenheim,FG
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