A key tyrosine substitution restricts nucleotide hydrolysis by the ectoenzyme NPP 5
نویسندگان
چکیده
منابع مشابه
The stereochemical course of hydrolysis catalysed by snake venom 5'-nucleotide phosphodiesterase.
Adenosine 5'-(S)-[16O,17O,18O]phosphate was pyrophosphorylated by the combined action of adenylate kinase and pyruvate kinase. The isotopomers of adenosine 5'-[alpha-16O,17O,18O]triphosphate were hydrolysed by venom 5'-nucleotide phosphodiesterase (Crotalus adamanteus) in H2(17)O. Analysis by 31P nuclear magnetic resonance spectroscopy of the resulting adenosine 5'-[16O,17O,18O]phosphate, after...
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Aminopeptidase P (EC 3.4.11.9) was solubilized from pig kidney membranes with bacterial phosphatidylinositol-specific phospholipase C (PI-PLC) and then purified by a combination of anion-exchange and hydrophobic-interaction chromatographies. Contaminating peptidase activities were removed by selective affinity chromatography. The purified enzyme was apparently homogeneous on SDS/PAGE with an Mr...
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Models of nucleotide substitution are commonly used in the analysis of DNA sequences. In this unit a protocol is described for the use of the program MODELTEST (coupled with PAUP*) to find the best-fit model of substitution for the sequence alignment at hand. An example data file is analyzed and the interpretation of the results is discussed. Some background theory on model selection and a disc...
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A “covarion” model for nucleotide substitution which allows sites to turn “on” and “off” with time was proposed 27 years ago by Fitch and Markowitz. It has been argued recently that evidence supports such models over later, alternative models which postulate a static distribution of rates across sites. However, in contrast to these latter well-studied models, little is known about the analytic ...
متن کاملModeling the covarion hypothesis of nucleotide substitution.
A "covarion" model for nucleotide substitution that allows sites to turn "on" and "off" with time was proposed in 1970 by Fitch and Markowitz. It has been argued recently that evidence supports such models over later, alternative models that postulate a static distribution of rates across sites. However, in contrast with these latter well-studied models, little is known about the analytic prope...
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ژورنال
عنوان ژورنال: The FEBS Journal
سال: 2017
ISSN: 1742-464X,1742-4658
DOI: 10.1111/febs.14266