Enzymes in Recombinant Proteins

<p>Butyrylcholinesterase is an enzyme made in the liver and found mainly in blood plasma. Butyrylcholinesterase (EC 3.1.1.8), also known as BChE or BuChE, is a nonspecific cholinesterase enzyme that hydrolyses choline-based esters. One unit of Butyrylcholinesterase will hydrolyze 1.0 μmole of butyrylcholine to choline and butyrate per minute at pH 8.0 and 37 °C.</p>

Lysozyme is a bacteriolytic enzyme, which is primarily derived from hen egg whites. It functions by hydrolyzing the β-1,4-glycosidic linkages in the peptidoglycan layer of bacterial cell walls, particularly in Gram-positive bacteria. This enzymatic activity results in the lysis and subsequent death of the bacterial cells, providing a potent antimicrobial effect.

Carboxypeptidase Y (EC 3.4.16.1) is an exopeptidase enzyme. It hydrolyzes peptide bonds of C-terminal residues and it remains active in the presence of urea at low to moderate concentrations. One unit of the Carboxypeptidase Y will hydrolyze 1.0 μmole of a chromogenic peptide substrate, releasing C-terminal alanine and generating a light-absorbing product.

beta-Galactosidase (EC 3.2.1.23, shortly beta-Gal, also know as lactase) catalyses the hydrolysis of beta-d-galactoside in the presence of water to galactose and alcohol, or lactose into glucose and galactose. beta-Gal has a molecular weight of 540,000 and is composed of four identical subunits of MW 135,000, each with an independent active site. The enzyme has divalent metals as cofactors, with chelated Mg2+ ions required to maintain active site conformation. The molecule contains numerous sulfhydryl groups and is glycosylated.

<p>Superoxide dismutase is an enzyme that catalyzes the conversion of harmful superoxide into hydrogen peroxide and oxygen.</p>

Maltose phosphorylase (systematic name maltose:phosphate 1-beta-D-glucosyltransferase; EC 2.4.1.8) is an enzyme that catalyzes the following reaction:  maltose + Pi ⇌ D-glucose + beta-D-glucose 1-phosphate  One unit of maltose phosphorylase will produce 1.0 μmole of D-Glucose from maltose per minute at pH 7.0 and 30°C.

<p>Acetylcholinesterase is an enzyme that breaks down acetylcholine</p>

Proteinase K is used for the general digestion of proteins and removal of protein contamination in nucleic acids. Addition of Protease K also stabilizes nucleic acids by degrading any nucleases present. Proteinase K is active in wide range of pH range, in the presence of SDS, urea and Guanidinium chloride at low to moderate concentrations. Proteinase K is also known under names of protease K and endopeptidase K.

<p>Glucose Dehydrogenase is an enzyme, which is typically derived from microbial sources such as bacteria and fungi. It functions by catalyzing the oxidation of glucose to gluconolactone, concurrently reducing a cofactor such as NAD⁺ or PQQ. This biochemical reaction is critical in various analytical applications due to its specificity and efficiency in glucose detection.Glucose Dehydrogenase is widely employed in the development of biosensors and diagnostic assays. Its primary application is in blood glucose monitoring devices, where its ability to accurately quantify glucose levels is crucial for managing diabetes. Additionally, it is utilized in research and development settings for biochemical assays that require precise glucose measurements. The enzyme's rapid and specific action on glucose molecules makes it an indispensable tool in both clinical and laboratory environments, contributing to advancements in biosensing technologies and metabolic studies.</p>

<p>Glucosidases are enzymes belonging to the family of oxidoreductases. They catalyse the hydrolysis of starches to simple sugars. Glucosidase is widely used in the food, carbohydrate and biofuels industries. In recent years, its applicability has expanded to biotechnology for its potential application in bioenzymatic fuel cells.</p>

<p>A proteolytic enzyme synthesized by the HIV cell as part of the GagPol polyprotein</p>

<p>E. coli recombinant α-2,6 sialyltransferase from Neisseria meningitidis. One unit is defined as the amount of enzyme that catalyses the formation of 1 μmol CMP-Neu5Ac from CTP and Neu5Ac per minute at 37 ºC.Activity: 100U/mg</p>

<p>E. coli recombinant sialic acid aldolase (EC 4.1.3.3) from Pasteurella multocida.  One unit is defined as the amount of enzyme that catalyses the formation of 1 umol Neu5Ac from ManNAc and Pyruvate per minute at 37 ℃.Activity: 9U/mg</p>

α-Glucosidase is a glycoside hydrolase enzyme that hydrolyzes α-1,4-linked D-glucose residues to produce α-D-glucose. This enzyme has been isolated from Bacillus stearothermophilus and is used as an industrial catalyst in the production of glucose syrups.  One Unit of α-Glucosidase will release 1.0 µmole of p-nitrophenol from the chromogenic substrate mimic 4-nitrophenyl α-D-glucopyranoside per minute under optimum conditions.

Lyticase is a lysing enzyme that is designed to lyse cells in a biological sample. It contains an optimized wild-type guanine nucleotide-binding protein and has been shown to have high enzyme activities. Lyticase has also been shown to be active against opportunistic fungal strains, such as Candida glabrata, by disrupting their cell membranes. Lyticase is classified as a signal peptide with nuclear DNA, which allows it to be used in wastewater treatment applications. The enzyme can also be used for the analysis of the Toll-like receptor (TLR) response of microbes due to its electrochemical impedance spectroscopy properties.

<p>Protease enzymes break down proteins and are essential for many biological processes, including digestion, cellular regulation and blood clotting. They are also used in many industrial and biotechnological applications for example in food processing and in detergents.</p>

Myokinase (Adenylate kinase, EC 2.7.4.3) catalyzes interconversion between ATP, ADP and AMP by catalyzing the following reaction:ATP + AMP ⇌ 2 ADPOne unit of Myokinase will convert 1.0 µmol ATP and 1.0 µmol AMP to 2.0 µmol ADP per min at 25°C and pH 7.5.

Phosphodiesterase II from bovine spleen is an enzyme derived from the spleen of cattle, which serves as a crucial biological catalyst for the hydrolysis of phosphodiester bonds in nucleotide sequences. This enzyme's mode of action involves cleaving the phosphodiester linkages within nucleic acids, facilitating the breakdown of these macromolecules into smaller nucleotide units.

Thioredoxin reductase (TR, TrxR) (EC 1.8.1.9) is an enzyme that reduce thioredoxin using NADPH as a co-factor, and also contains FAD. One unit of thioredoxin reductase will raise increase light absorbance by 1.0 per minute at 412nm in the presence of thioredoxin and Ellman's reagent at pH 7.0 and 25 °C.

<p>Triose-phosphate isomerase (TPI, TIM; EC 5.3.1.1) is an enzyme that catalyzes the reversible isomerisation of dihydroxyacetone phosphate and D-glyceraldehyde 3-phosphate:  DHAP ⇌ GADP  The reaction mechanism involves the formation of an enediol intermediate. One unit of Triose-phosphate isomerase will convert 1.0 μmole glyceraldehyde 3-phosphate to dihydroxyacetone phosphate per min at pH 7.6 and 25 °C.</p>