Molecular characterization of the heat shock protein 90 gene of the human malaria parasite Plasmodium falciparum.
We report here the nucleotide sequence of hsp90 (heat shock protein 90) of Plasmodium falciparum. Computer analysis of the deduced protein sequence revealed an unusually large region of charged amino acids when compared to hsp90 from other species. This region shows striking homology to the calcium binding domain of calreticulin, the major calcium binding protein of endoplasmic reticulum. Phylogenetic tree analysis indicates that P. falciparum hsp90 is more closely related to hsp90 from plants than to hsp90 from vertebrates or other parasites. The malaria hsp90 is an ATP binding protein encoded by a single gene constitutively expressed in both asexual (trophozoite) and sexual (gametocyte) stage parasites. The hsp90 protein is homologous to a previously identified 90-kDa antigen strongly recognised by both sera from vaccinated monkeys and monoclonal antibody XIV/7.
Unité de Parasitologie Expérimentale, Institut Pasteur, Paris, France.
S
S
Bonnefoy
G
G
Attal
G
G
Langsley
F
F
Tekaia
O
O
Mercereau-Puijalon
D000255:Adenosine Triphosphate / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D001483:Base Sequence; D002135:Calcium-Binding Proteins / Q000235:genetics; D037282:Calreticulin; D002352:Carrier Proteins / Q000235:genetics; D003001:Cloning, Molecular; D016384:Consensus Sequence; D017931:DNA Primers / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics; D016054:DNA, Protozoan / Q000235:genetics; D017125:Genes, Protozoan; D018841:HSP90 Heat-Shock Proteins / Q000235:genetics* / Q000276:immunology; D006801:Humans; D007438:Introns; D008969:Molecular Sequence Data; D010963:Plasmodium falciparum / Q000235:genetics* / Q000254:growth & development; D012261:Ribonucleoproteins / Q000235:genetics; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity
D000911:Antibodies, Monoclonal; D002135:Calcium-Binding Proteins; D037282:Calreticulin; D002352:Carrier Proteins; D017931:DNA Primers; D018076:DNA, Complementary; D016054:DNA, Protozoan; D018841:HSP90 Heat-Shock Proteins; D012261:Ribonucleoproteins; D000255:Adenosine Triphosphate