The Candida albicans AAA ATPase homologue of Saccharomyces cerevisiae Rix7p (YLL034c) is essential for proper morphology, biofilm formation and activity of secreted aspartyl proteinases

The Candida albicans AAA ATPase homologue of Saccharomyces cerevisiae Rix7p (YLL034c) is essential for proper morphology, biofilm formation and activity of secreted aspartyl proteinases

Author Melo, Analy Salles de Azevedo Autor UNIFESP Google Scholar
Padovan, Ana Carolina Barbosa Autor UNIFESP Google Scholar
Serafim, Rui Cosme Autor UNIFESP Google Scholar
Puzer, Luciano Autor UNIFESP Google Scholar
Carmona, Adriana Karaoglanovic Autor UNIFESP Google Scholar
Juliano, Luiz Autor UNIFESP Google Scholar
Brunstein, Adriana Autor UNIFESP Google Scholar
Briones, Marcelo Ribeiro da Silva Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Proper morphology is essential for the ability of Candida albicans to switch between yeast and hyphae and thereby sustain its virulence. Here we identified, by differential screening, a novel C. albicans AAA ATPase encoding gene, CaYLL34 (RIX7), with enhanced expression in hyphae. Phylogenetic analysis suggests that CaYLL34 belongs to a VCP-like subgroup of AAA ATPases essential for yeast viability and contains a bipartite nuclear localization signal. Inactivation of one copy of CaYLL34, by the URA-Blaster method, generated the heterozygous mutant strain M61. This strain has severe phenotypic alterations, such as a highly increased vacuole, abnormal cell shape and reduced growth in different conditions. Also, major pathogenicity factors are affected in M61, for instance, a significant decrease of hypha formation (>90%), surface biofilm adhesion (86%) and secreted aspartyl proteinase activity (76.5%). Our results show that the partial impairment of CaYll34p cellular levels is sufficient to affect the proper cellular morphology and pathogenicity factors and suggest that this protein is required for biogenesis of ribosomal subunits. Accordingly, we propose that the product of CaYLL34 could be tested as a novel target for antifungal drugs.
Keywords AAA ATPases
Candida albicans
CottonPrep
YLL34
RIX7
differential screening
insertional mutagenesis
Language English
Date 2006-01-01
Published in Genetics And Molecular Research. Ribeirao Preto: Funpec-editora, v. 5, n. 4, p. 664-687, 2006.
ISSN 1676-5680 (Sherpa/Romeo, impact factor)
Publisher Funpec-editora
Extent 664-687
Origin http://www.funpecrp.com.br/gmr/year2006/vol4-5/gmr0256_abstract.htm
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000203012000010
URI http://repositorio.unifesp.br/11600/43716

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