Mutations affecting transition-state stabilization by residues coordinating zinc at the active site of cytidine deaminase.
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Summary
Affinities of the mutant cytidine deaminases for the transition-state analogue, 5-fluoropyrimidin-2-one ribonucleoside (3,4) hydrate, were found to decrease in rough proportion to kcat/Km over a range spanning several orders of magnitude, indicating the involvement of zinc coordination in the catalytic process rather than in substrate binding.
- Type
- article
- Published
- 1994-05-31
- Cited by
- 30
- References
- 26
- OpenAlex
- https://openalex.org/W1966947361
- Semantic Scholar
- https://api.semanticscholar.org/CorpusID:11414065
Keywords
Zinc, Enzyme kinetics, Cytidine deaminase, Chemistry, Enzyme
References
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- Cloning and nucleotide sequence of the Escherichia coli cytidine deaminase (ccd) gene.
- Phosphonamidates as transition-state analogue inhibitors of thermolysin.
Cited by
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- Gut hormone PYY3-36 physiologically inhibits food intake
- Transition state and multisubstrate analog inhibitors.
- A Single Zinc Ion Is Sufficient for an Active Trypanosoma brucei tRNA Editing Deaminase*
- A Cytidine Deaminase Edits C to U in Transfer RNAs in Archaea
- Free‐flow electrophoresis for top‐down proteomics by Fourier transform ion cyclotron resonance mass spectrometry
- Mutagenesis of apobec-1, the Catalytic Subunit of the Mammalian Apolipoprotein B mRNA Editing Enzyme, Reveals Distinct Domains That Mediate Cytosine Nucleoside Deaminase, RNA Binding, and RNA Editing Activity (*)
- Isolation of a human gene that inhibits HIV-1 infection and is suppressed by the viral Vif protein
- Functional characterization of human carbonic anhydrase II variants with altered zinc binding sites.
- The APOBEC-2 crystal structure and functional implications for the deaminase AID
- Flight of a cytidine deaminase complex with an imperfect transition state analogue inhibitor: mass spectrometric evidence for the presence of a trapped water molecule.
- Intracellular Localization of Human Cytidine Deaminase
- A functional single-nucleotide polymorphism in the human cytidine deaminase gene contributing to ara-C sensitivity.
- Fourier transform ion cyclotron resonance MS reveals the presence of a water molecule in an enzyme transition-state analogue complex.
- Evolutionary origins of apoB mRNA editing: catalysis by a cytidine deaminase that has acquired a novel RNA-binding motif at its active site.
- Thiazole and oxazole peptides: biosynthesis and molecular machinery.
- Major contribution of a carboxymethyl group to transition-state stabilization by cytidine deaminase: mutation and rescue.
- An adenosine-to-inosine tRNA-editing enzyme that can perform C-to-U deamination of DNA
- Activity of Yeast Orotidine-5′-phosphate Decarboxylase in the Absence of Metals*
- Escherichia coli cytosine deaminase: the kinetics and thermodynamics for binding of cytosine to the apoenzyme and the Zn(2+) holoenzyme are similar.
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