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| Content Provider | PubMed Central |
|---|---|
| Author | Valle, R. La Bromuro, C. Ranucci, L. Muller, H. M. Crisanti, A. Cassone, A. |
| Abstract | By screening an expression library of the yeast form of Candida albicans with a serum directed against whole fungal cells, a cDNA (2,325 bp) encoding a stress protein of C. albicans was cloned and sequenced. The cloned sequence (CaRLV130) identified a single open reading frame with a length of 1,968 bp coding for a protein containing 656 amino acid residues (70 kDa). The deduced amino acid sequence was 84% similar to the sequence of the Saccharomyces cerevisiae SSA1 gene, which encodes one member of the 70-kDa heat shock protein (Hsp70) family. The relevant gene (C. albicans HSP70 gene [CaHSP70]) was localized on the highest-M(r) (R1; approximately 3.8 Mb) chromosome of C. albicans as determined by pulse-field electrophoresis. CaHSP70 was expressed after heat shock, as demonstrated by Northern (RNA) blotting and reverse transcriptase-PCR with specific pairs of oligonucleotide sequences and gene probes. A recombinant protein was obtained in Escherichia coli after cloning of the full coding sequence into the BamHI site of the pDS56/RBSII6xhisE- plasmid and purification by nickel chelate affinity chromatography. The recombinant protein (6xhis-CaHsp70) was efficiently recognized in immunoblots by a monoclonal antibody directed against a common epitope of eukaryotic Hsp70 proteins, as well as by sera from normal human subjects. Moreover, immune mouse sera against the purified recombinant protein recognized native, heat-inducible constituents with sizes of around 70 kDa in whole-cell protein extracts of C. albicans. Overall, our data demonstrate that CaHSP70 encodes one member of a family of proteins (Hsp70) which usually represent highly conserved immunodominant antigens of infectious agents. |
| Starting Page | 4039 |
| File Format | |
| ISSN | 10985522 |
| e-ISSN | 10985522 |
| Journal | Infection and Immunity |
| Issue Number | 10 |
| Volume Number | 63 |
| Language | English |
| Publisher Date | 1995-10-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Parasitology Immunology Microbiology |
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