Computational Analysis Reveals a Key Regulator of Cryptococcal Virulence and Determinant of Host Response
- Washington Univ., St. Louis, MO (United States). Center for Genome Sciences and Systems Biology. Dept. of Molecular Microbiology; DOE/OSTI
- Washington Univ., St. Louis, MO (United States). School of Medicine; Washington Univ., St. Louis, MO (United States). Dept. of Computer Science and Engineering
- Washington Univ., St. Louis, MO (United States). Center for Genome Sciences and Systems Biology. Dept. of Molecular Microbiology
- Washington Univ., St. Louis, MO (United States). Dept. of Pathology and Immunology
- Washington Univ., St. Louis, MO (United States). School of Medicine; Washington Univ., St. Louis, MO (United States). Dept. of Computer Science and Engineering; Washington Univ., St. Louis, MO (United States). Dept. of Genetics
Cryptococcus neoformans is a ubiquitous, opportunistic fungal pathogen that kills over 600,000 people annually. Here, we report integrated computational and experimental investigations of the role and mechanisms of transcriptional regulation in cryptococcal infection. Major cryptococcal virulence traits include melanin production and the development of a large polysaccharide capsule upon host entry; shed capsule polysaccharides also impair host defenses. We found that both transcription and translation are required for capsule growth and that Usv101 is a master regulator of pathogenesis, regulating melanin production, capsule growth, and capsule shedding. It does this by directly regulating genes encoding glycoactive enzymes and genes encoding three other transcription factors that are essential for capsule growth: GAT201, RIM101, and SP1. Murine infection with cryptococci lacking Usv101 significantly alters the kinetics and pathogenesis of disease, with extended survival and, unexpectedly, death by pneumonia rather than meningitis. Our approaches and findings will inform studies of other pathogenic microbes.
- Research Organization:
- Washington Univ., St. Louis, MO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- FG02-93ER20097
- OSTI ID:
- 1630030
- Journal Information:
- mBio (Online), Journal Name: mBio (Online) Journal Issue: 2 Vol. 7; ISSN 2150-7511
- Publisher:
- American Society for Microbiology (ASM)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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