An evolutionarily diverged mitochondrial protein controls biofilm growth and virulence in Candida albicans

被引:10
|
作者
Mamouei, Zeinab [1 ]
Singh, Shakti [2 ]
Lemire, Bernard [3 ]
Gu, Yiyou [2 ]
Alqarihi, Abdullah [2 ]
Nabeela, Sunna [2 ]
Li, Dongmei [4 ]
Ibrahim, Ashraf [1 ,2 ]
Uppuluri, Priya [1 ,2 ]
机构
[1] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[2] Harbor UCLA Med Ctr, Lundquist Inst Biomed Innovat, Div Infect Dis, Torrance, CA 90509 USA
[3] Univ Alberta, Dept Biochem, Edmonton, AB, Canada
[4] Georgetown Univ, Med Ctr, Dept Microbiol & Immunol, Washington, DC 20007 USA
关键词
D O I
10.1371/journal.pbio.3000957
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A forward genetic screening approach identified orf19.2500 as a gene controlling Candida albicans biofilm dispersal and biofilm detachment. Three-dimensional (3D) protein modeling and bioinformatics revealed that orf19.2500 is a conserved mitochondrial protein, structurally similar to, but functionally diverged from, the squalene/phytoene synthases family. The C. albicans orf19.2500 is distinguished by 3 evolutionarily acquired stretches of amino acid inserts, absent from all other eukaryotes except a small number of ascomycete fungi. Biochemical assays showed that orf19.2500 is required for the assembly and activity of the NADH ubiquinone oxidoreductase Complex I (CI) of the respiratory electron transport chain (ETC) and was thereby named NDU1. NDU1 is essential for respiration and growth on alternative carbon sources, important for immune evasion, required for virulence in a mouse model of hematogenously disseminated candidiasis, and for potentiating resistance to antifungal drugs. Our study is the first report on a protein that sets the Candida-like fungi phylogenetically apart from all other eukaryotes, based solely on evolutionary "gain" of new amino acid inserts that are also the functional hub of the protein.
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页数:27
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