Interaction of thymidylate synthase with pyridoxal 5'-phosphate as studied by UV/visible difference spectroscopy and molecular modeling

Biochemistry ◽  
1993 ◽  
Vol 32 (44) ◽  
pp. 11819-11824 ◽  
Author(s):  
Daniel V. Santi ◽  
Tian Mei Ouyang ◽  
Anthony K. Tan ◽  
Donald H. Gregory ◽  
Thomas Scanlan ◽  
...  
Keyword(s):  
Molecular Modeling ◽  
Thymidylate Synthase ◽  
Difference Spectroscopy ◽  
Uv Visible

A spirooxazine derivative as a highly sensitive cyanide sensor by means of UV-visible difference spectroscopy

The Analyst ◽  
2012 ◽  
Vol 137 (23) ◽  
pp. 5581 ◽  
Author(s):  
Shaoyin Zhu ◽  
Minjie Li ◽  
Lan Sheng ◽  
Peng Chen ◽  
Yumo Zhang ◽  
...  
Keyword(s):  
Difference Spectroscopy ◽  
Highly Sensitive ◽  
Uv Visible

scholarly journals 2-Mercaptobenzoxazole pentacyanoferrate(II/III) complexes: UV-Visible, Mössbauer, electron paramagnetic resonance, electrochemistry and molecular modeling

2004 ◽  
Vol 15 (1) ◽  
pp. 10-15 ◽  
Author(s):  
Juciane B Luiz ◽  
Fabiano M. de Andrade ◽  
Eduardo L. de Sá ◽  
Geraldo R Friedermann ◽  
Antonio S Mangrich ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Molecular Modeling ◽  
Paramagnetic Resonance ◽  
Uv Visible ◽  
Electron Paramagnetic

scholarly journals New insights for titanium(iv) speciation in acidic media based on UV-visible and 31P NMR spectroscopies and molecular modeling

RSC Advances ◽  
2021 ◽  
Vol 11 (43) ◽  
pp. 27059-27073
Author(s):  
Lucas Mangold ◽  
Hubert Halleux ◽  
Sébastien Leclerc ◽  
Aurélien Moncomble ◽  
Gérard Cote ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Molecular Modeling ◽  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
31P Nmr ◽  
Acidic Media ◽  
Polynuclear Species ◽  
Uv Visible

A spectroscopic study of titanium(iv) speciation in diluted nitric acid (model of non-complexing medium) and 0.1–12.7 mol L−1 phosphoric acid aqueous solutions. Evidence for the presence of polynuclear species is supported by molecular modeling.

A benzo[e]indole[2,1-b][1,3]benzooxazine derivative as a highly sensitive CN− sensor by means of UV–visible difference spectroscopy

2021 ◽  
Vol 189 ◽  
pp. 109252
Author(s):  
Yan Zhu ◽  
Guo-Guo Chen ◽  
Zhen-You Zhang ◽  
Shi-Li Shen ◽  
Yan-Qing Ge ◽  
...  
Keyword(s):  
Difference Spectroscopy ◽  
Highly Sensitive ◽  
Uv Visible

scholarly journals Molecular mechanism of thymidylate synthase-catalyzed reaction and interaction of the enzyme with 2- and/or 4-substituted analogues of dUMP and 5-fluoro-dUMP.

1996 ◽  
Vol 43 (1) ◽  
pp. 133-142 ◽  
Author(s):  
W Rode ◽  
A Leś
Keyword(s):  
Reaction Mechanism ◽  
Molecular Modeling ◽  
Thymidylate Synthase ◽  
Pyrimidine Ring ◽  
Inhibition Mechanism ◽  
Inhibitory Potency ◽  
Thymidylate Synthases ◽  
Binding Inhibition ◽  
Molecular Modeling Studies ◽  
Thymidylate Synthase Inhibitors

Thymidylate synthase is a target enzyme in anticancer, antiviral, antifungal and antiprotozoan chemotherapy. With two dUMP analogues, 5-fluoro-dUMP (FdUMP) and 5-(trifluoromethyl)-dUMP (CF3dUMP), strong thymidylate synthase inhibitors and active forms of drugs, the inhibition mechanism is based on the reaction mechanism. Recent comparative studies of new dUMP analogues, containing more than one substituent in the pyrimidine ring, showed that substitution of the pyrimidine ring C(4) = O group in FdUMP by either C(4) = N-OH group (in N4-hydroxy-FdCMP) or C(4) = S group (in 4-thio-FdUMP) preserves high inhibitory potency of the drug but may alter its specificity for thymidylate synthases from various sources, which differ in sensitivity to slow-binding inhibition by FdUMP. Informations suggesting mechanisms responsible for the foregoing have been reviewed, including results of molecular modeling studies suggesting interaction of the pyrimidine C(4) = O group, or its modification, with the N5,10-methylene.(ABSTRACT TRUNCATED)

scholarly journals Development and Validation of UV-Visible Spectrophotometric Baseline Manipulation Method for Simultaneous Quantitation of Tenofovir Disoproxil Fumarate and Emtricitabine in Pharmaceutical Dosage Form

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Vishnu P. Choudhari ◽  
Sanket R. Parekar ◽  
Subhash G. Chate ◽  
Pradeep D. Bharande ◽  
Rajiv R. Singh ◽  
...  
Keyword(s):  
Tenofovir Disoproxil Fumarate ◽  
Dosage Form ◽  
Distilled Water ◽  
Difference Spectroscopy ◽  
Pharmaceutical Dosage Form ◽  
Ich Guidelines ◽  
Uv Visible ◽  
Development And Validation ◽  
Tablet Dosage

A simple, economical, precise, and accurate new UV-visible spectrophotometric baseline manipulation method for simultaneous determination of tenofovir disoproxil fumarate (TE) and emtricitabine (EM) in combined tablet dosage form has been developed. The method is based on baseline manipulation (difference) spectroscopy where amplitudes at 261 and 289.9 nm were selected to determine TE and EM, respectively, in combined formulation, and distilled water was used as solvent. Both drugs obey Beer’s law in the concentration ranges of 4–20 μg/mL for TE and 6–30 μg/mL for EM. The results of analysis have been validated statistically, and recovery studies confirmed the accuracy of the proposed method which was carried out by following the ICH guidelines.

Sign in / Sign up

Export Citation Format

Share Document