首页> 外文期刊>Genomics >Bruton tyrosine kinase-like protein, BtkSD, is present in the marine sponge Suberites domuncula.
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Bruton tyrosine kinase-like protein, BtkSD, is present in the marine sponge Suberites domuncula.

机译:布鲁顿酪氨酸激酶样蛋白BtkSD存在于海洋海绵Suberites domuncula中。

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摘要

Sponges, the simplest and most ancient phylum of Metazoa, encode in their genome complex and highly sophisticated proteins that evolved together with multicellularity and are found only in metazoan animals. We report here the finding of a Bruton tyrosine kinase (BTK)-like protein in the marine sponge Suberites domuncula (Demospongiae). The nucleotide sequence of one sponge cDNA predicts a 700-aa-long protein, which contains all of the characteristic domains for the Tec family of protein tyrosine kinases (PTKs). The highest homology (38% identity, 55% overall similarity) was found with human BTK and TEC PTKs. Sponge PTK was therefore named BtkSD. Human BTK is involved in the maturation of B cells and mutations in the BTK gene cause X-linked agammaglobulinemia. Kinases from the Tec family are not present in Caenorhabditis elegans and, until now, they were found only in insects and higher animal taxa. Our finding implies that the BTK/TEC genes are of a very ancient origin.
机译:海绵是后生动物最简单,最古老的门,其基因组中编码复杂而高度复杂的蛋白质,这些蛋白质与多细胞性一起进化,仅在后生动物中发现。我们在这里报告的发现在海洋海绵Suberites domuncula(Demospongiae)中的布鲁顿酪氨酸激酶(BTK)样蛋白的发现。一个海绵cDNA的核苷酸序列可预测700-aa长的蛋白质,其中包含蛋白质酪氨酸激酶(PTK)Tec家族的所有特征域。与人类BTK和TEC PTK的同源性最高(38%一致性,55%总体相似性)。因此,海绵PTK被命名为BtkSD。人BTK参与B细胞的成熟,而BTK基因的突变会导致X连锁的球蛋白血症。秀丽隐杆线虫中不存在来自Tec家族的激酶,直到现在,它们仅在昆虫和高等动物类群中被发现。我们的发现暗示BTK / TEC基因起源很久。

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