Giardia lamblia: immunogenicity and intracellular distribution of GHSP-115, a member of the Giardia head-stalk family of proteins.
Giardia lamblia, a protozoan causing diarrheal outbreaks, is one of the main pathogens monitored in developed countries. Immunoscreening of G. lamblia expression library using the monoclonal antibodies (mAb) against G. lamblia, identified a subset of antigenic proteins in this protozoan, which are proteins belonging to GHSP (Giardia head-stalk protein), GHSP115, GHSP138, and GHSP180. In order to map the epitope region of GHSP115, the corresponding open reading frame was dissected into three parts and expressed as recombinant proteins with histidine tags. Western blot analysis of these recombinant proteins with mAbs reacting with GHSP115 indicated that one-third of the C-terminus of GHSP115 showed immunoreactivity with the mAb. Intracellular location of GHSP115 was examined both in trophozoites and encysting cells of G. lamblia by an immunofluorescence assay, indicating that location of GHSP115 varies during encystation. These results suggest that GHSP115 is an abundant and antigenic protein, which is differentially localized during life cycle of G. lamblia.
Bae
Sung Su
SS
Department of Environmental Medical Biology and Institute of Tropical Medicine, The Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 120-752, South Korea.
Kim
Juri
J
Kim
Tong-Soo
TS
Yong
Tai-Soon
TS
Park
Soon-Jung
SJ
D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000276:immunology; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D016829:Giardia lamblia / Q000737:chemistry / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D015800:Protozoan Proteins / Q000032:analysis / Q000737:chemistry / Q000276:immunology*; D011994:Recombinant Proteins / Q000032:analysis / Q000737:chemistry / Q000276:immunology
D000911:Antibodies, Monoclonal; D015800:Protozoan Proteins; D011994:Recombinant Proteins