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Parasitol Res. 2007 Nov;101(6):1511-6. Epub 2007 Jul 27.

Enolase as a plasminogen binding protein in Leishmania mexicana.

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  • 1Laboratorio de Fisiología, Centro de Ingeniería Genética, Facultad de Ciencias, Universidad de Los Andes, La Hechicera, Mérida 5101, Venezuela.

Abstract

Enolase is a glycolytic and gluconeogenic enzyme also found on the surface of several eukaryotic and prokaryotic cells where it acts as plasminogen binding protein. Leishmania mexicana, one of the causative agents of Leishmaniasis, binds plasminogen and, in this parasite, enolase has been previously found associated with the external face of the plasma membrane. In this work, we show that the purified recombinant enolase has plasminogen binding activity indicating that, at the surface of the parasite, the protein may function as one of the plasminogen receptors. An internal motif (249)AYDAERKMY(257), similar to the nine amino-acid internal plasminogen-binding motif in Streptococcus pneumoniae enolase, is responsible for plasminogen interaction with the parasite enolase. Anti-enolase antibodies inhibited up to 60% of plasminogen binding on live parasites indicating that enolase act as a plasminogen receptor on the parasite. The fact that enolase acts as a possible plasminogen receptor in vivo makes this protein a promising target for therapy.

PMID:
17653767
[PubMed - indexed for MEDLINE]
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