Characterization of developmentally-regulated nucleases in promastigotes and amastigotes of Leishmania mexicana

Bates, P A (1993) Characterization of developmentally-regulated nucleases in promastigotes and amastigotes of Leishmania mexicana. FEMS Microbiology Letters, 107 (1). pp. 53-58. ISSN 0378-1097

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Abstract

The parasitic protozoon Leishmania mexicana was examined for the presence of 3'-nucleotidase/nuclease using substrate SDS-PAGE. Two activities were detected: one with an apparent molecular mass of 40 kDa, and a doublet of 29/31 kDa. The two enzymes showed differences in their levels of expression in the two life-cycle stages of parasite examined: the 29/31 kDa doublet was detected at 60-fold higher levels in the pathogenic amastigote stage, but was also expressed by promastigotes, whereas the 40 kDa activity was only detected in promastigotes. Both were capable of hydrolysing a variety of substrates including 3'-AMP and poly(A). However, the 29/31 kDa form showed a broader, unique substrate specificity in that it was also capable of digesting double-stranded RNA and DNA.

Item Type:
Journal Article
Journal or Publication Title:
FEMS Microbiology Letters
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qr355
Subjects:
ID Code:
56062
Deposited By:
Deposited On:
24 Jul 2012 08:43
Refereed?:
Yes
Published?:
Published
Last Modified:
10 Sep 2020 07:48