BdcA, a protein important for Escherichia coli biofilm dispersal, is a short-chain dehydrogenase/reductase that binds specifically to NADPH.

BdcA, a protein important for Escherichia coli biofilm dispersal, is a short-chain dehydrogenase/reductase that binds specifically to NADPH.
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BDCA是一种对大肠杆菌生物膜散布重要的蛋白质,是一种与NADPH专门结合的短链脱氢酶/还原酶。

DOI:
10.1371/journal.pone.0105751
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Page R
Page R
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Lord DM;Baran AU;Wood TK;Peti W;Page R

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大肠杆菌蛋白BdcA(以前称为YjgI)在细胞从细菌生物膜中分散中起关键作用,并且其组成性激活为拆除这些社区提供了有吸引力的治疗靶点。为了在分子水平上研究BdcA的功能,我们整合了结构和功能研究。BdcA的2.05 bp结构表明它是NAD(P)(H)依赖性短链脱氢酶/还原酶(SDR)超家族的成员。与SDR家族其他成员的结构比较表明,BdcA结合NADP(H)。这一点通过热变性研究得到了实验证明,该研究表明BcdA特异性结合NADPH。随后的ITC实验进一步证实了这一结果,并报告Kd为25.9 µM。因此,BdcA代表了参与群体感应和生物膜扩散的有限数量的氧化还原酶的最新成员。
The Escherichia coli protein BdcA (previously referred to as YjgI) plays a key role in the dispersal of cells from bacterial biofilms, and its constitutive activation provides an attractive therapeutic target for dismantling these communities. In order to investigate the function of BdcA at a molecular level, we integrated structural and functional studies. Our 2.05 Å structure of BdcA shows that it is a member of the NAD(P)(H)-dependent short-chain dehydrogenase/reductase (SDR) superfamily. Structural comparisons with other members of the SDR family suggested that BdcA binds NADP(H). This was demonstrated experimentally using thermal denaturation studies, which showed that BcdA binds specifically to NADPH. Subsequent ITC experiments further confirmed this result and reported a Kd of 25.9 µM. Thus, BdcA represents the newest member of the limited number of oxidoreductases shown to be involved in quorum sensing and biofilm dispersal.
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