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首页> 外文期刊>Genomics >Characterization of the genomic structure of the mouse limbic system-associated membrane protein (Lsamp) gene.
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Characterization of the genomic structure of the mouse limbic system-associated membrane protein (Lsamp) gene.

机译:小鼠边缘系统相关膜蛋白(Lsamp)基因的基因组结构的表征。

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摘要

The Lsamp gene encodes the limbic system-associated membrane protein (LAMP) an immunoglobulin (Ig) superfamily member with three Ig domains and a glycosylphosphatidylinositol anchor. LAMP is expressed by neurons composing the limbic system, is highly conserved between rodents and human, and has structural and functional properties that substantiate its role in the formation of limbic circuits. We report here the genomic organization of the Lsamp gene. The Lsamp gene is composed of 11 exons distributed over 2.2 megabases (Mb). Two exons 1 are separated by approximately 1.6 Mb and contribute to the unusual large size of the gene. Alternative spliced Lsamp mRNAs are generated from distinct promoter regions associated with the two exons 1 that encode distinct signal peptides and thus generate identical native mature polypetides. Additional diversity is created by the use of two small exons to include an insertion of 23 amino acids within the polypeptide C-terminal region of the mature protein. The genomic features of the Lsamp gene described here indicate an intricate mechanism of gene expression regulation that may be relevant in the context of human neuropsychiatric and neurological disorders, where LAMP expression may be altered.
机译:Lsamp基因编码边缘系统相关膜蛋白(LAMP),它是具有三个Ig域和糖基磷脂酰肌醇锚的免疫球蛋白(Ig)超家族成员。 LAMP由组成边缘系统的神经元表达,在啮齿动物和人类之间高度保守,并具有结构和功能特性,可证实其在边缘电路形成中的作用。我们在这里报告Lsamp基因的基因组组织。 Lsamp基因由分布在2.2兆碱基(Mb)上的11个外显子组成。两个外显子1的间隔约为1.6 Mb,并导致该基因异常大。从与编码不同信号肽的两个外显子1相关的不同启动子区域产生替代的剪接的Lsamp mRNA,从而产生相同的天然成熟多肽。通过使用两个小外显子来创造额外的多样性,包括在成熟蛋白的多肽C端区域内插入23个氨基酸。本文所述的Lsamp基因的基因组特征表明,基因表达调控的复杂机制可能与人类神经精神疾病和神经疾病(可能会改变LAMP表达)有关。

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