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Expression of a malarial Hsp70 improves defects in chaperone-dependent activities in ssa1 mutant yeast

Bell, SL and Chiang, AN and Brodsky, JL (2011) Expression of a malarial Hsp70 improves defects in chaperone-dependent activities in ssa1 mutant yeast. PLoS ONE, 6 (5).

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Plasmodium falciparum causes the most virulent form of malaria and encodes a large number of molecular chaperones. Because the parasite encounters radically different environments during its lifecycle, many members of this chaperone ensemble may be essential for P. falciparum survival. Therefore, Plasmodium chaperones represent novel therapeutic targets, but to establish the mechanism of action of any developed therapeutics, it is critical to ascertain the functions of these chaperones. To this end, we report the development of a yeast expression system for PfHsp70-1, a P. falciparum cytoplasmic chaperone. We found that PfHsp70-1 repairs mutant growth phenotypes in yeast strains lacking the two primary cytosolic Hsp70s, SSA1 and SSA2, and in strains harboring a temperature sensitive SSA1 allele. PfHsp70-1 also supported chaperone-dependent processes such as protein translocation and ER associated degradation, and ameliorated the toxic effects of oxidative stress. By introducing engineered forms of PfHsp70-1 into the mutant strains, we discovered that rescue requires PfHsp70-1 ATPase activity. Together, we conclude that yeast can be co-opted to rapidly uncover specific cellular activities mediated by malarial chaperones. © 2011 Bell et al.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Bell, SL
Chiang, ANanc64@pitt.eduANC64
Brodsky, JLjbrodsky@pitt.eduJBRODSKY0000-0002-6984-8486
ContributionContributors NameEmailPitt UsernameORCID
Date: 25 May 2011
Date Type: Publication
Journal or Publication Title: PLoS ONE
Volume: 6
Number: 5
DOI or Unique Handle: 10.1371/journal.pone.0020047
Schools and Programs: Dietrich School of Arts and Sciences > Biological Sciences
Refereed: Yes
MeSH Headings: Adenosine Triphosphatases--chemistry; Adenosine Triphosphatases--genetics; Amino Acid Sequence; Animals; HSP70 Heat-Shock Proteins--chemistry; HSP70 Heat-Shock Proteins--genetics; HSP70 Heat-Shock Proteins--metabolism; Molecular Sequence Data; Mutation; Plasmodium falciparum--metabolism; Saccharomyces cerevisiae Proteins--chemistry; Saccharomyces cerevisiae Proteins--genetics; Sequence Homology, Amino Acid; Yeasts--genetics; Yeasts--metabolism
Other ID: NLM PMC3098276
PubMed Central ID: PMC3098276
PubMed ID: 21625512
Date Deposited: 29 Aug 2012 21:08
Last Modified: 02 Feb 2019 16:56


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