The acyl-CoA-binding protein VdAcb1 is essential for carbon starvation response and contributes to virulence in Verticillium dahliae

被引:0
|
作者
Zhuang, Jing [1 ,2 ]
Zhang, Ya-Duo [1 ,3 ]
Sun, Wei-Xia [1 ]
Zong, Juan [1 ]
Li, Jun-Jiao [1 ]
Dai, Xiao-Feng [1 ,4 ]
Klosterman, Steven J. [5 ]
Chen, Jie-Yin [1 ,4 ]
Tian, Li [2 ]
Subbarao, Krishna V. [6 ]
Zhang, Dan-Dan [1 ,4 ]
机构
[1] Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
[2] Qufu Normal Univ, Sch Life Sci, Qufu 273165, Peoples R China
[3] Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Minist Agr & Rural Affairs,Shenzhen Branch, Guangdong Lab Lingnan Modern Agr,Key Lab Synthet B, Shenzhen 518120, Peoples R China
[4] Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Peoples R China
[5] Agr Res Serv, United States Dept Agr, Salinas, CA 93905 USA
[6] Univ Calif Davis, Dept Plant Pathol, United States Agr Res Stn, Salinas, CA 93905 USA
基金
中国国家自然科学基金;
关键词
Verticillium dahliae; Unconventional secreted protein; Acyl-CoA-binding protein; Carbon starvation; Virulence factor; FILAMENTOUS GROWTH; UNCONVENTIONAL SECRETION; EXPRESSION; KINASE; PATHWAY; ACB1; PATHOGEN; STRESS; MSN2; PKA;
D O I
10.1007/s42994-024-00175-3
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
In the face of carbon, nitrogen, and phosphorus starvation, microorganisms have evolved adaptive mechanisms to maintain growth. In a previous study, we identified a protein predicted to contain acyl-CoA-binding domains in the plant pathogenic fungus Verticillium dahliae. The predicted protein, designated VdAcb1, possesses an atypical signal peptide. However, the functions of this acyl-CoA-binding protein in V. dahliae are not clear. In this research, in vivo or in vitro assays confirmed that VdAcb1 is secreted extracellularly from V. dahliae, although it does not have the typical signal peptide. Furthermore, the unconventional secretion of VdAcb1 was dependent on VdGRASP, a member of the compartment for unconventional protein secretion (CUPS). The deletion mutant strain of VdAcb1 (Delta VdAcb1) exhibited significant sensitivity to carbon starvation. RNA-seq revealed that the expression of genes related to filamentous growth (MSB2 pathway) and sugar transport were regulated by VdAcb1 under conditions of carbon starvation. Yeast one-hybrid experiments further showed that the expression of VdAcb1 was positively regulated by the transcription factor VdMsn4. The Delta VdAcb1 strain showed significantly reduced virulence on Gossypium hirsutum and Nicotiana benthamiana. We hypothesize that under conditions of carbon starvation, the expression of VdAcb1 is activated by VdMsn4 and VdAcb1 is secreted into the extracellular space. In turn, this activates the downstream MAPK pathway to enhance filamentous growth and virulence of V. dahliae.
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收藏
页码:431 / 448
页数:18
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