Found 9617 Results / Page 385 of 481

Pre-resonance enhancement of exceptional intensity in aggregation-induced Raman optical activity spectra of lutein derivatives

2017 / Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Recently reported new phenomenon of Aggregation-Induced Raman Optical Activity is demonstrated here for the first time in the pre-resonance conditions… Continue reading Pre-resonance enhancement of exceptional intensity in aggregation-induced Raman optical activity spectra of lutein derivatives

Leah Pandiscia, PhD

Characterization and Low-Resolution Structure of an Extremely Thermostable Esterase of Potential Biotechnological Interest from Pyrococcus furiosus

2016 / Molecular Biotechnology

Enzymes isolated from extremophiles often exhibit superior performance and potential industrial applications. There are several advantages performing biocatalysis at elevated… Continue reading Characterization and Low-Resolution Structure of an Extremely Thermostable Esterase of Potential Biotechnological Interest from Pyrococcus furiosus

Leah Pandiscia, PhD

Shape-Controlled Synthesis of Organometallic Microcrystal-Based Hollow Hexagonal Micromotors through Evaporation-Induced Supramolecular Self-Assembly

2016 / Crystal Grown & Design

A facile strategy was developed to fabricate structure controllable microcrystals of ferrocene-based metal–organic (Fc-Ala-BCB) materials through evaporation-induced self-assembly. Two distinctive… Continue reading Shape-Controlled Synthesis of Organometallic Microcrystal-Based Hollow Hexagonal Micromotors through Evaporation-Induced Supramolecular Self-Assembly

Leah Pandiscia, PhD

The chondroitin sulfate/dermatan sulfate 4-O-endosulfatase from marine bacterium Vibrio sp FC509 is a dimeric species: Biophysical characterization of an endosulfatase

2016 / Biochimie

Sulfatases catalyze hydrolysis of sulfate groups. They have a key role in regulating the sulfation states that determine the function… Continue reading The chondroitin sulfate/dermatan sulfate 4-O-endosulfatase from marine bacterium Vibrio sp FC509 is a dimeric species: Biophysical characterization of an endosulfatase

Leah Pandiscia, PhD

SpyTag can spontaneously form a covalent isopeptide bond with its protein partner SpyCatcher. Firefly luciferase from Photinus pyralis was cyclized in vivo by fusing SpyCatcher at the N terminus and SpyTag at the C terminus. Circular LUC was more thermostable and alkali-tolerant than the wild type, without compromising the specific activity. Structural analysis indicated that the cyclized LUC increased the thermodynamic stability of the structure and remained more properly folded at high temperatures when compared with the wild type. We also prepared an N-terminally and C-terminally shortened form of the SpyCatcher protein and cyclization using this truncated form led to even more thermostability than the original form. Our findings suggest that cyclization with SpyTag and SpyCatcher is a promising and effective strategy to enhance thermostability of enzymes.

2016 / PLoS ONE

SpyTag can spontaneously form a covalent isopeptide bond with its protein partner SpyCatcher. Firefly luciferase from Photinus pyralis was cyclized in vivo by fusing… Continue reading SpyTag can spontaneously form a covalent isopeptide bond with its protein partner SpyCatcher. Firefly luciferase from Photinus pyralis was cyclized in vivo by fusing SpyCatcher at the N terminus and SpyTag at the C terminus. Circular LUC was more thermostable and alkali-tolerant than the wild type, without compromising the specific activity. Structural analysis indicated that the cyclized LUC increased the thermodynamic stability of the structure and remained more properly folded at high temperatures when compared with the wild type. We also prepared an N-terminally and C-terminally shortened form of the SpyCatcher protein and cyclization using this truncated form led to even more thermostability than the original form. Our findings suggest that cyclization with SpyTag and SpyCatcher is a promising and effective strategy to enhance thermostability of enzymes.

Leah Pandiscia, PhD

Identification of Specific Effect of Chloride on the Spectral Properties and Structural Stability of Multiple Extracellular Glutamic Acid Mutants of Bacteriorhodopsin

2016 / PLoS ONE

In the present work we combine spectroscopic, DSC and computational approaches to examine the multiple extracellular Glu mutants E204Q/E194Q, E204Q/E194Q/E9Q… Continue reading Identification of Specific Effect of Chloride on the Spectral Properties and Structural Stability of Multiple Extracellular Glutamic Acid Mutants of Bacteriorhodopsin

Leah Pandiscia, PhD

Evidence for the Regulatory Role of the N-terminal Helix of Secretory Phospholipase A2 from Studies on Native and Chimeric Proteins

2005 / The Journal of Biological Chemistry

The phospholipase A2 (PLA2) enzymes are activated by binding to phospholipid membranes. Although the N-terminal α-helix of group I/II PLA2s plays… Continue reading Evidence for the Regulatory Role of the N-terminal Helix of Secretory Phospholipase A2 from Studies on Native and Chimeric Proteins

Leah Pandiscia, PhD

Structural and Functional Effects of Tryptophans Inserted into the Membrane-binding and Substrate-binding Sites of Human Group IIA Phospholipase A2

2006 / Biochemistry

Phospholipase A2 (PLA2) enzymes become activated by binding to biological membranes and hydrolyze phospholipids to free fatty acids and lyso-phospholipids, the… Continue reading Structural and Functional Effects of Tryptophans Inserted into the Membrane-binding and Substrate-binding Sites of Human Group IIA Phospholipase A2

Leah Pandiscia, PhD

Binaphthyl luminophores with triphenylsilyl groups: sign inversion of circularly polarized luminescence and circular dichroism

2016 / Tetrahedron

C2-symmetric binaphthol derivatives bearing two bulky C3-symmetric triphenylsilyl side groups, open-style 3,3′-bis(triphenylsilyl)-1,1′-bi-2-naphthol and closed-style 3,3′-bis(triphenylsilyl)-1,1′-binaphthyl-2,2′-diyl hydrogenphosphate, emit circularly polarized luminescence (CPL)… Continue reading Binaphthyl luminophores with triphenylsilyl groups: sign inversion of circularly polarized luminescence and circular dichroism

Leah Pandiscia, PhD
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