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Mechanism of proton transfer in class A β-lactamase catalysis and inhibition by avibactam.
Pemberton OA, Noor RE, Kumar M V V, Sanishvili R, Kemp MT, Kearns FL, Woodcock HL, Gelis I, Chen Y. Pemberton OA, et al. Proc Natl Acad Sci U S A. 2020 Mar 17;117(11):5818-5825. doi: 10.1073/pnas.1922203117. Epub 2020 Mar 2. Proc Natl Acad Sci U S A. 2020. PMID: 32123084 Free PMC article.
To help unravel the ambiguity surrounding class A beta-lactamase catalysis, we have used ultrahigh-resolution X-ray crystallography and the recently approved beta-lactamase inhibitor avibactam to trap the acyl-enzyme complex of class A beta-lactamase CTX-M-14 at varying pH …
To help unravel the ambiguity surrounding class A beta-lactamase catalysis, we have used ultrahigh-resolution X-ray crystallography and the …
A novel aluminum-sensitive fluorescent chemosensor based on 4-aminoantipyrine: An experimental and theoretical study.
Alyaninezhad Z, Bekhradnia A, Feizi N, Arshadi S, Zibandeh M. Alyaninezhad Z, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5;212:32-41. doi: 10.1016/j.saa.2018.12.035. Epub 2018 Dec 21. Spectrochim Acta A Mol Biomol Spectrosc. 2019. PMID: 30594851
Compound A2 has displayed a considerable fluorescence enhancement with high selectivity and sensitivity toward Al(3+) ion and exhibited an emission band at 484 nm, which contained a low detection limit (LOD) of 1.06 10(-7) M. In accordance to the experimental study, DFT, T …
Compound A2 has displayed a considerable fluorescence enhancement with high selectivity and sensitivity toward Al(3+) ion and exhibited an e …
A highly selective optode for determination of Hg (II) by a modified immobilization of indigo carmine on a triacetylcellulose membrane.
Tavallali H, Shaabanpur E, Vahdati P. Tavallali H, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2012 Apr;89:216-21. doi: 10.1016/j.saa.2011.12.055. Epub 2012 Jan 9. Spectrochim Acta A Mol Biomol Spectrosc. 2012. PMID: 22277622
The sensor could readily be regenerated with a hydrochloric acid solution (0.01 M) in a reversible manner and its response was reproducible (RSD=3.2%). ...
The sensor could readily be regenerated with a hydrochloric acid solution (0.01 M) in a reversible manner and its response was reprod …
Selective recognition of Ni2+ ion based on fluorescence enhancement chemosensor.
Ganjali MR, Hosseini M, Motalebi M, Sedaghat M, Mizani F, Faridbod F, Norouzi P. Ganjali MR, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2015 Apr 5;140:283-7. doi: 10.1016/j.saa.2014.12.042. Epub 2014 Dec 24. Spectrochim Acta A Mol Biomol Spectrosc. 2015. PMID: 25615675
At the optimum conditions, the fluorescence intensity of L at 352 nm enhances linearly by the concentration of nickel ion from 1.610(-5) to 1.610(-7) M and detection limit of 7.910(-8) M. The new fluorescent probe exhibited high selectivity to Ni2+ ion over the othe …
At the optimum conditions, the fluorescence intensity of L at 352 nm enhances linearly by the concentration of nickel ion from 1.610(-5) to …
Effects of prolonged food limitation on energy metabolism and burrowing activity of an infaunal marine bivalve, Mya arenaria.
Haider F, Timm S, Bruhns T, Noor MN, Sokolova IM. Haider F, et al. Comp Biochem Physiol A Mol Integr Physiol. 2020 Dec;250:110780. doi: 10.1016/j.cbpa.2020.110780. Epub 2020 Aug 3. Comp Biochem Physiol A Mol Integr Physiol. 2020. PMID: 32758703
During the early phase of starvation, clams preferentially used lipids as fuel for burrowing, whereas carbohydrates were used at the later phase. These findings suggest that although M. arenaria can withstand prolonged food deprivation by lowering their basal maintenance c …
During the early phase of starvation, clams preferentially used lipids as fuel for burrowing, whereas carbohydrates were used at the later p …
Spectroscopic and electrochemical studies of the interaction between oleuropein, the major bio-phenol in olives, and salmon sperm DNA.
Mohamadi M, Afzali D, Esmaeili-Mahani S, Mostafavi A, Torkzadeh-Mahani M. Mohamadi M, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2015 Sep 5;148:260-5. doi: 10.1016/j.saa.2015.03.123. Epub 2015 Apr 4. Spectrochim Acta A Mol Biomol Spectrosc. 2015. PMID: 25909900
Titration of oleuropein with the DNA caused a hypochromism accompanied with a red shift indicating an intercalative mode of interaction. Binding constant of 1.410(4) M(-1) was obtained for this interaction. From the curves of fluorescence titration of oleuropein with the D …
Titration of oleuropein with the DNA caused a hypochromism accompanied with a red shift indicating an intercalative mode of interaction. Bin …
An efficient and ultrasensitive rhodamine B-based reversible colorimetric chemosensor for naked-eye recognition of molybdenum and citrate ions in aqueous solution: sensing behavior and logic operation.
Tavallali H, Deilamy-Rad G, Parhami A, Hasanli N. Tavallali H, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2015 Mar 15;139:253-61. doi: 10.1016/j.saa.2014.11.110. Epub 2014 Dec 24. Spectrochim Acta A Mol Biomol Spectrosc. 2015. PMID: 25561304
This chemosensor can be applied for quantification of citrate with a linear range covering from 1.6710(-7) to 1.2210(-5) M and a detection limit of 2.010(-8) M. Moreover, the response of the chemosensor toward Mo(6+) and citrate is fast. ...
This chemosensor can be applied for quantification of citrate with a linear range covering from 1.6710(-7) to 1.2210(-5) M and a dete …
Extreme drought impacts have been underestimated in grasslands and shrublands globally.
Smith MD, Wilkins KD, Holdrege MC, Wilfahrt P, Collins SL, Knapp AK, Sala OE, Dukes JS, Phillips RP, Yahdjian L, Gherardi LA, Ohlert T, Beier C, Fraser LH, Jentsch A, Loik ME, Maestre FT, Power SA, Yu Q, Felton AJ, Munson SM, Luo Y, Abdoli H, Abedi M, Alados CL, Alberti J, Alon M, An H, Anacker B, Anderson M, Auge H, Bachle S, Bahalkeh K, Bahn M, Batbaatar A, Bauerle T, Beard KH, Behn K, Beil I, Biancari L, Blindow I, Bondaruk VF, Borer ET, Bork EW, Bruschetti CM, Byrne KM, Cahill JF Jr, Calvo DA, Carbognani M, Cardoni A, Carlyle CN, Castillo-Garcia M, Chang SX, Chieppa J, Cianciaruso MV, Cohen O, Cordeiro AL, Cusack DF, Dahlke S, Daleo P, D'Antonio CM, Dietterich LH, S Doherty T, Dubbert M, Ebeling A, Eisenhauer N, Fischer FM, Forte TGW, Gebauer T, Gozalo B, Greenville AC, Guidoni-Martins KG, Hannusch HJ, Vatsø Haugum S, Hautier Y, Hefting M, Henry HAL, Hoss D, Ingrisch J, Iribarne O, Isbell F, Johnson Y, Jordan S, Kelly EF, Kimmel K, Kreyling J, Kröel-Dulay G, Kröpfl A, Kübert A, Kulmatiski A, Lamb EG, Larsen KS, Larson J, Lawson J, Leder CV, Linstädter A, Liu J, Liu S, Lodge AG, Longo G, Loydi A, Luan J, Curtis Lubbe F, Macfarlane C, Mackie-Haas K, Malyshev AV, Maturano-Ruiz A,… See abstract for full author list ➔ Smith MD, et al. Proc Natl Acad Sci U S A. 2024 Jan 23;121(4):e2309881120. doi: 10.1073/pnas.2309881120. Epub 2024 Jan 8. Proc Natl Acad Sci U S A. 2024. PMID: 38190514 Free PMC article.
Studies of interaction between terbium(III)-deferasirox and double helix DNA by spectral and electrochemical methods.
Shaghaghi M, Dehghan G, Jouyban A, Sistani P, Arvin M. Shaghaghi M, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2014;120:467-72. doi: 10.1016/j.saa.2013.09.073. Epub 2013 Oct 7. Spectrochim Acta A Mol Biomol Spectrosc. 2014. PMID: 24211806
The binding constants (Kb) for the complex with ctDNA were estimated to be 1.810(4) M(-1) through UV absorption spectrophotometry and fluorescence spectroscopy. ...
The binding constants (Kb) for the complex with ctDNA were estimated to be 1.810(4) M(-1) through UV absorption spectrophotometry and …
15 results