Identification of the role of a MAP kinase Tmk2 in Hypocrea jecorina (Trichoderma reesei).

Identification of the role of a MAP kinase Tmk2 in Hypocrea jecorina (Trichoderma reesei).
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鉴定 MAP 激酶 Tmk2 在红褐肉座菌(里氏木霉)中的作用

DOI:
10.1038/srep06732
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发表时间:
2014-10-23
期刊:
影响因子:
4.6
通讯作者:
Fang X
Fang X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang M;Dong Y;Zhao Q;Wang F;Liu K;Jiang B;Fang X

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尽管MAPKs在信号转导中起着重要作用,但除了Hog 1样Tmk 3外,其在纤维素酶高产丝状真菌红褐肉座菌中的功能尚未得到研究。在这项工作中,我们构建和探索的H。jecorina Δ tmk 2来鉴定这种Slt 2同源Tmk 2的作用。结果表明,Tmk 2基因可能与细胞壁完整性、产孢和纤维素酶的产生有关。虽然Tmk 2和Tmk 3在维持细胞壁完整性方面具有相似的作用,但它们似乎也具有不同的功能:Tmk 3参与高渗透压抗性,而Tmk 2不参与; Tmk 2参与孢子形成,而Tmk 3不参与; Tmk 3参与促进纤维素酶的产生,而Tmk 2参与抑制纤维素酶的形成。这些研究首次揭示了Tmk 2在H. jecorina的研究,有助于了解导致这种重要的纤维素酶超级生产菌中纤维素酶生产调节的信号传导过程。
Despite the important role of MAPKs in signal transduction, their functions in the cellulase hyper-producing filamentous fungus Hypocrea jecorina haven't been studied except for the Hog1-like Tmk3. In this work, we constructed and explored the features of H. jecorina Δtmk2 to identify the role of this Slt2-homologous Tmk2. It is suggested from the results that Tmk2 is involved in cell wall integrity, sporulation and cellulase production. Although bearing similar roles in cell wall integrity maintenance, Tmk2 and Tmk3 appear to also have distinct functions: Tmk3 participates in high osmolarity resistance while Tmk2 does not; Tmk2 participates in sporulation but not Tmk3; Tmk3 is involved in promoting cellulase production while Tmk2 is involved in repressing cellulase formation. These studies provide the first insight into the function of Tmk2 in H. jecorina and contribute to understanding the signal transduction processes leading to the regulation of cellulase production in this important cellulase hyper-producer.
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