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Snake venom dipeptidyl peptidase IV: taxonomic distribution and quantitative variation. | LitMetric

Snake venom dipeptidyl peptidase IV: taxonomic distribution and quantitative variation.

Comp Biochem Physiol B Biochem Mol Biol

Center for Biotechnology and Biomedical Studies, Department of Biology, Norfolk State University, 700 Park Avenue, WSB 224A, Norfolk, VA 23504, USA.

Published: June 2008

AI Article Synopsis

Article Abstract

The present study examined the taxonomic distribution of dipeptidyl peptidase IV (DPP IV) activity in venoms of 59 ophidian taxa, representing seven subfamilies of the Families Elapidae and Viperidae. DPP IV activity is extremely variable at all taxonomic levels. It ranged from essentially none in laticaudine, hydrophiine, and some bungarine and elapine venoms, to 10.72 mumol 4-methoxy-beta-naphthylamine liberated per min per 200 mug venom, for Ophiophagus hannah. Intra- and interpopulational variation were examined among eight populations of prairie rattlesnakes (Crotalus viridis viridis), Great Basin rattlesnakes (Crotalus viridis lutosus) and southern Pacific rattlesnakes (Crotalus viridis helleri). Among these populations, the mean weighted range of variation was 4.9-fold, and even among litter mates of C. v. lutosus, DPP IV activity varied as much as 5.6-fold. The two most salient findings, the near ubiquity of DPP IV in snake venoms and its great quantitative variability, even among full siblings, are paradoxical. The widespread distribution of the enzyme suggests an important role in envenomation, while the variable activity levels suggest that DPP IV and by extension, other individual enzymatic constituents, may not be under much individual selective pressure.

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Source
http://dx.doi.org/10.1016/j.cbpb.2008.03.005DOI Listing

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