Expression of a hydrophilic surface protein in infective stages of Leishmania major
1994
Abstract A family of differentially expressed genes from Leishmania major contains one sequence (Gene B) that encodes a novel, hydrophilic protein found on the surface of infective parasite stages. The 177-residue, acidic Gene B protein is characterised by an amino acid repetitive element, comprising 45% of the total molecule, that is related to the cell-wall binding domain of protein A from Staphylococcus aureus . No identifiable signal peptide, membrane-spanning domain or consensus for glycosylphosphatidylinositol anchor attachment to the cell surface is found elsewhere in the deduced protein sequence. In vitro, the Gene B protein fractionates with the parasite cell surface glycoconjugates, lipophosphoglycan and the glycoinositolphospholipids. This protein is the first characterised surface peptide marker for infective stages of the Leishmania life cycle.
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