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In biochemistry, denaturation is a process in which proteins or nucleic acids lose folded structure present in their native state due to various factors, including application of some external stress or compound, such as a strong acid or base, a concentrated inorganic salt, an organic solvent (e.g., alcohol or chloroform), agitation and radiation, or heat. [3]
Thermus aquaticus is a species of bacteria that can tolerate high temperatures, one of several thermophilic bacteria that belong to the Deinococcota phylum. It is the source of the heat-resistant enzyme Taq DNA polymerase, one of the most important enzymes in molecular biology because of its use in the polymerase chain reaction (PCR) DNA amplification technique.
The two enzymes have similar folding patterns and protein domains. In fact, past attempts to produce drugs targeting glucansucrase have not been successful because the drugs also disrupted amylase, which is necessary to break down starches. [12] [13] This occurred because the active sites of the two enzymes are nearly the same. Glucansucrase ...
Each chemical modification (red box) is performed by a different enzyme. Several enzymes can work together in a specific order, creating metabolic pathways. [1]: 30.1 In a metabolic pathway, one enzyme takes the product of another enzyme as a substrate. After the catalytic reaction, the product is then passed on to another enzyme.
T. aquaticus is a bacterium that lives in hot springs and hydrothermal vents, and Taq polymerase was identified [1] as an enzyme able to withstand the protein-denaturing conditions (high temperature) required during PCR. [2] Therefore, it replaced the DNA polymerase from E. coli originally used in PCR. [3]
Elimination of specific hydroxyl groups on the glucopyranose moiety does not eliminate catalysis. [17] Lactase also catalyzes the conversion of phlorizin to phloretin and glucose. Lactase (Lactaid commercially) is used as a medication for lactose intolerance. Since it is an enzyme, its function can be inhibited by the acidity of the stomach.
Ribbon representation of the Streptomyces lividans β-1,4-endoglucanase catalytic domain - an example from the family 12 glycoside hydrolases [1]. Cellulase (EC 3.2.1.4; systematic name 4-β-D-glucan 4-glucanohydrolase) is any of several enzymes produced chiefly by fungi, bacteria, and protozoans that catalyze cellulolysis, the decomposition of cellulose and of some related polysaccharides:
Enzymes NapAB, NirS, NirK and NosZ are located in the periplasm, a wide space bordered by the cytoplasmic and the outer membrane in Gram-negative bacteria. [16] A variety of environmental factors can influence the rate of denitrification on an ecosystem-wide scale. For example, temperature and pH have been observed to impact denitrification rates.