Discovery of a novel esterase subfamily sharing an identified arm sequence (ArmEst) by gene-specific metagenomic PCR

Discovery of a novel esterase subfamily sharing an identified arm sequence (ArmEst) by gene-specific metagenomic PCR
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通过基因特异性宏基因组 PCR 发现共享已识别臂序列 (ArmEst) 的新型酯酶亚家族

DOI:
10.1007/s10529-013-1293-4
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发表时间:
2013-07
影响因子:
2.7
通讯作者:
Wang, Qiuyan
Wang, Qiuyan
中科院分区:
工程技术4区
文献类型:
--
作者:
Pei, Xiaolin;Yu, Li;Yin, Xiaopu;Wang, Qiuyan

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一种基因特异性的宏基因组PCR方法导致发现了一个新的酯酶亚家族,由五个同源成员组成。这个酯酶亚家族的序列分析,命名为ArmEst亚家族,揭示了一个独特的保守模式,具有显着的可变内部序列两侧的两个对称和相同的长臂序列。两个同源长臂序列在该酯酶类的五个成员之间具有100%的序列同一性和两端对称性,但内部序列仅具有17- 58%的同一性。两个ArmEst酯酶的生化特性明确表明,它们是真正的活性酯酶,而不是假基因。这是第一份报告提出了酯酶亚家族含有一个独特的臂序列,表明一个罕见的同源重组发生在一个功能基因的编码区,以产生其功能的多样性。
A gene-specific, metagenomic PCR method has led to the discovery of a novel esterase subfamily consisting of five homologous members. Sequence analysis of this esterase subfamily, named the ArmEst subfamily, revealed a unique conserved pattern with a significant variable interior sequence flanked by two symmetric and identical long arm sequences. The two homologous long arm sequences had 100 % sequence identity and symmetry at both ends between the five members of this esterase class, but only 17–58 % identity was shared for the internal sequence. The biochemical properties of two of the ArmEst esterases definitively demonstrated that they are true active esterases rather than pseudogenes. This is the first report presenting an esterase subfamily containing a unique arm sequence, indicating a rare homologous recombination occurring in the coding area of a functional gene to generate their functional diversity.
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影响因子: 6.1
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