Site-Directed Mutagenesis Study Revealed Three Important Residues in Hc-DAF-22, a Key Enzyme Regulating Diapause of Haemonchus contortus.
Site-Directed Mutagenesis Study Revealed Three Important Residues in Hc-DAF-22, a Key Enzyme Regulating Diapause of Haemonchus contortus.
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定点诱变研究揭示了 Hc-DAF-22 中的三个重要残基，Hc-DAF-22 是调节捻转血矛线虫滞育的关键酶
DOI：
10.3389/fmicb.2017.02176
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发表时间：
2017
影响因子：
5.2
通讯作者：
Du A
中科院分区：
文献类型：
--
作者：
Huang Y;Zheng X;Zhang H;Ding H;Guo X;Yang Y;Chen X;Zhou Q;Du A
Haemonchus contortus (H. contortus) is one of the most important parasites of small ruminants, especially goats and sheep. The complex life cycle of this nematode is a main obstacle for the control and prevention of haemonchosis. So far, a special form of arrested development called diapause different from the dauer stage in Caenorhabditis elegans (C. elegans) has been found in many parasitic nematodes. In our previous study, we have characterized a novel gene Hc-daf-22 from H. contortus sharing high homology with Ce-daf-22 and functional analysis showed this gene has similar biological function with Ce-daf-22. In this study, Hc-daf-22 mutants were constructed using site-directed mutagenesis, and carried out rescue experiments, RNA interference (RNAi) experiments and in vitro enzyme activity analysis with the mutants to further explore the precise function site of Hc-DAF-22. The results showed that Hc-daf-22 mutants could be expressed in the rescued ok693 worms and the expression positions were mainly in the intestine which was identical with that of Hc-daf-22 rescued worms. Through lipid staining we found that Hc-daf-22 could rescue daf-22 mutant (ok693) from the fatty acid metabolism deficiency while Hc-daf-22 mutants failed. Brood size and body length analyses in rescue experiment along with body length and life span analyses in RNAi experiment elucidated that Hc-daf-22 resembled Ce-daf-22 in effecting the development and capacity of C. elegans and mutants impaired the function of Hc-daf-22. Together with the protease activity assay, this research revealed three important active resides 84C/299H/349H in Hc-DAF-22 by site-directed mutagenesis.
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影响因子：
14.8
作者：
Butcher RA
通讯作者：
Butcher RA
影响因子：
4.8
作者：
Jenzer, Celine;Simionato, Elena;Legouis, Renaud
通讯作者：
Legouis, Renaud
影响因子：
14.9
作者：
BAIROCH, A
通讯作者：
BAIROCH, A
影响因子：
1.4
作者：
Kelly, G. A.;Kahn, L. P.;Walkden-Brown, S. W.
通讯作者：
Walkden-Brown, S. W.
影响因子：
9.2
作者：
Choe, Andrea;von Reuss, Stephan H.;Kogan, Dima;Gasser, Robin B.;Platzer, Edward G.;Schroeder, Frank C.;Sternberg, Paul W.
通讯作者：
Sternberg, Paul W.