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Ancient duplications of the human proglucagon gene.

机译:人类胰高血糖素原基因的古代重复。

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摘要

The human proglucagon gene (GCG) is encoded within a finished 576-kb DNA sequence generated by the Human Genome Project. GCG is flanked by 18 kb and 65 kb of DNA, 5' and 3', respectively, that do not encode genes. The genomic sequence that includes GCG was found to have a long history of gene duplication events. Some members of the glucagon-like family of genes, GCG on chromosome 2 and GIP on chromosome 17, may be products of ancient genome duplications on the early vertebrate lineage. A large genomic tandem duplication event that included DPP4-like and GCG genes occurred before the amphibian-mammal divergence, but one of the duplicated copies of GCG has been lost on the human lineage. Recently, a processed pseudogene of the X-chromosome-linked gene TIMM8A was inserted downstream of GCG. Some ancient duplicates of GCG may retain physiological functions in other vertebrates. (c)2002 Elsevier Science (USA).
机译:人类前胰高血糖素基因(GCG)在人类基因组计划生成的最终576-kb DNA序列中编码。 GCG的侧翼分别是18 kb和65 kb的DNA,即5'和3',它们不编码基因。发现包括GCG的基因组序列具有悠久的基因复制事件历史。胰高血糖素样基因家族的某些成员,第2号染色体上的GCG和第17号染色​​体上的GIP,可能是早期脊椎动物谱系中古代基因组重复的产物。在两栖动物-哺乳动物发散之前,发生了一个大型的基因组串联重复事件,其中包括DPP4样基因和GCG基因,但在人类谱系中已丢失了GCG的重复副本之一。最近,将X染色体连接的基因TIMM8A的加工后的假基因插入到GCG的下游。 GCG的某些古代复制品可能在其他脊椎动物中保留生理功能。 (c)2002 Elsevier Science(美国)。

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