Primary structure and partial characterization of a life-cycle-regulated cysteine protease from Trypanosoma (Nannomonas) congolense
1995
Fish, W.R. | Nkhungulu, Z.M. | Muriuki, C.W. | Ndegwa, D.M. | Lonsdale-Eccles, J.D. | Steyaert, J.
Trypanosoma (Nannomonas) congolense is an important pathogenic parasite of domestic livestock in Africa. We have cloned a cDNA encoding a prepro-cysteine protease of this protozoan, the sequence of which indicates it is an early mRNA processing intermediate. Northern analysis demonstrates a life-cycle-stage specificity similar to previously described enzymatic data. The deduced amino-acid sequence shows extensive similarity to cysteine proteases of other parasitic protozoa, as well as papain and cathepsin L. As with other African trypanosomes, a poly-proline tract connects the catalytic domain with an unusual C-terminal extension.
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