Synthesizing Hindered Structure Poly (p‐Phenylenediamine) by Enzymatic Catalysis and Evaluating Its Antioxidation Mechanism in Biodegradable Castor Oils

2021 ◽  
Author(s):  
Changqing Miao ◽  
Yanbo Wang ◽  
Zhiying Ma ◽  
Yang Luo ◽  
Yu Miao ◽  
...  
Keyword(s):  
Enzymatic Catalysis ◽  
Antioxidation Mechanism

Matrix metalloproteinases: structure, functions and genetic polymorphism

2017 ◽  
pp. 14-23
Author(s):  
А.С. Шадрина ◽  
И.В. Терешкина ◽  
Я.З. Плиева ◽  
Д.Н. Кушлинский ◽  
Д.О. Уткин ◽  
...  
Keyword(s):  
Genetic Polymorphism ◽  
Matrix Metalloproteinases ◽  
Active Center ◽  
Human Body ◽  
Enzymatic Catalysis ◽  
Structure Functions ◽  
Zinc Ion ◽  
Etiological Factors ◽  
Mmp Genes

Матриксные металлопротеиназы (ММП) - ферменты класса гидролаз, осуществляющие ферментативный катализ с помощью связанного в активном центре иона цинка. Функции ММП разнообразны, и нарушение баланса их активности может быть одним из этиологических факторов различных заболеваний. В данном обзоре рассмотрена классификация ММП человека, особенности их структуры и регуляции, а также роль в физиологических и патологических процессах в организме человека. Приведен перечень наиболее изученных на настоящий момент полиморфных вариантов генов MMП, описаны их функциональные эффекты и представлены результаты ассоциативных исследований. Matrix metalloproteinases (MMPs) are enzymes of the hydrolase class that carry out enzymatic catalysis with the help of a zinc ion bound in the active center. MMP functions are diverse, and a disturbance in the balance of their activity may be one of the etiological factors of various diseases. In this review, the classification of human MMP, the features of their structure and regulation, as well as the role in physiological and pathological processes in the human body are considered. A list of the most studied polymorphic versions of MMP genes has been given, their functional effects have been described, and the results of associative studies have been presented.

The Role of Hydrophobicity in Supramolecular Polymer/Surfactant Catalysts: An Understandable Model for Enzymatic Catalysis

2020 ◽  
Author(s):  
Paulo F.A. Costa ◽  
Rafael de Abreu ◽  
Andressa B. Fontana ◽  
Haidi D. Fiedler ◽  
Anthony J. Kirby ◽  
...  
Keyword(s):  
Enzymatic Catalysis ◽  
Supramolecular Polymer ◽  
Polymer Surfactant

Dynamic Connection between Enzymatic Catalysis and Collective Protein Motions

Biochemistry ◽  
2021 ◽  
Author(s):  
Pedro Ojeda-May ◽  
Ameeq UI Mushtaq ◽  
Per Rogne ◽  
Apoorv Verma ◽  
Victor Ovchinnikov ◽  
...  
Keyword(s):  
Enzymatic Catalysis ◽  
Protein Motions

Development of a new amperometric biosensor based on polyphenoloxidase and polyethersulphone membrane

2001 ◽  
Vol 73 (12) ◽  
pp. 1993-1999 ◽  
Author(s):  
P. V. Climent ◽  
M. L. M. Serralheiro ◽  
M. J. F. Rebelo
Keyword(s):  
Phenolic Compounds ◽  
Response Time ◽  
Enzyme Immobilization ◽  
Platinum Electrode ◽  
Enzymatic Catalysis ◽  
Amperometric Biosensor ◽  
Catecholase Activity

An amperometric biosensor based on the enzyme polyphenoloxidase (PPO), which makes the bioelectrocatalysis of phenolic compounds, was developed and optimized using cathecol as substrate. Polyethersulphone membranes were used for enzyme immobilization. Polyphenoloxidase oxidizes monophenols (cresolase activity) and diphenols (catecholase activity) into the corresponding o-quinones; the o-quinones formed in the enzymatic catalysis are then reduced back to cathecol at ­200 mV (vs. Ag, AgCl) at a platinum electrode. The polyphenoloxidase immobilized was from commercial origin or extracted from mushrooms. p-Cresol and phenol substrates were also tested. Reproducibility, response time, linearity, sensitivity, and stability of the biosensor were studied.

scholarly journals The Important Role of Halogen Bond in Substrate Selectivity of Enzymatic Catalysis

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Shuiqin Jiang ◽  
Lujia Zhang ◽  
Dongbin Cui ◽  
Zhiqiang Yao ◽  
Bei Gao ◽  
...  
Keyword(s):  
Halogen Bond ◽  
Enzymatic Catalysis ◽  
Substrate Selectivity

scholarly journals Recent Advances in Engineering of Media for Enzymatic Catalysis with Lipase

2014 ◽  
Vol 26 (13) ◽  
pp. 3755-3760 ◽  
Author(s):  
Yuanyuan Li ◽  
Fen Wang ◽  
Yingqiang Shen ◽  
Anming Wang ◽  
Canyu Chen1
Keyword(s):  
Enzymatic Catalysis ◽  
Recent Advances

Enzymatic catalysis in toxicologic pathology

2001 ◽  
Vol 221 (1-2) ◽  
pp. 159-169 ◽  
Author(s):  
U. Deschl ◽  
U. Bach
Keyword(s):  
Enzymatic Catalysis
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