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Aminoglycoside is a medicinal and bacteriologic category of traditional Gram-negative antibacterial medications that inhibit protein synthesis and contain as a portion of the molecule an amino-modified glycoside .
Aminoglycoside-3'-phosphotransferase (APH(3')), also known as aminoglycoside kinase, is an enzyme that primarily catalyzes the addition of phosphate from ATP to the 3'-hydroxyl group of a 4,6-disubstituted aminoglycoside, such as kanamycin. [2]
G418 (geneticin) is an aminoglycoside antibiotic similar in structure to gentamicin B1.It is produced by Micromonospora rhodorangea. [1] G418 blocks polypeptide synthesis by inhibiting the elongation step in both prokaryotic and eukaryotic cells. [1]
In enzymology, an aminoglycoside N6'-acetyltransferase (EC 2.3.1.82) is an enzyme that catalyzes the chemical reaction. acetyl-CoA + kanamycin-B CoA + N 6 '-acetylkanamycin-B. Thus, the two substrates of this enzyme are acetyl-CoA and kanamycin B, whereas its two products are CoA and N6'-acetylkanamycin-B.
Kanamycin is in the aminoglycoside family of medications. [3] It has the weakest antibacterial capabilities of all compounds in this family when used clinically, which is partially due to its increased toxicity in comparison to other aminoglycosides. [5] It works by blocking the production of proteins that are required for bacterial survival. [3]
Aminocyclitols are found as a component of aminoglycoside antibiotics which is also called as pseudosugars or pseudosaccharides. Aminocyclitols have chemical structures of a carbon ring with amine functional group(s). The class of aminocyclitol containing natural products can be divided by ring sizes or types of precursors.
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However, aminoglycosides, including apramycin, have been shown to not only cause misreading of the genetic code but also significantly slow down the overall rate of protein synthesis in live bacterial cells. [4] This dual effect on both accuracy and efficiency of protein synthesis helps to explain the bactericidal properties of apramycin.