Kanamycin

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Kanamycin
Systematic (IUPAC) name
2-(aminomethyl)- 6-[4,6-diamino-3- [4-amino-3,5-dihydroxy-6-(hydroxymethyl) tetrahydropyran-

2-yl]oxy-2-hydroxy-cyclohexoxy]- tetrahydropyran-3,4,5-triol

Identifiers
CAS number 8063-07-8
ATC code A07AA08 J01GB04 S01AA24
PubChem 6032
DrugBank APRD00026
Chemical data
Formula C18H36N4O11 
Mol. mass 484.499
Pharmacokinetic data
Bioavailability very low after oral delivery
Metabolism  ?
Half life 2 hours 30 minutes
Excretion  ?
Therapeutic considerations
Pregnancy cat.

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Legal status

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Routes Oral, intravenous, intramuscular

Kanamycin sulfate is an aminoglycoside antibiotic, available in both oral and intravenous forms, and used to treat a wide variety of infections. Kanamycin is isolated from Streptomyces kanamyceticus[1].

Contents

[edit] Pharmacology

Kanamycin works by affecting the 30S ribosomal subunit and causing a frameshift mutation or it prevents the translation of RNA. This means that instead of a codon CAT (for example in sequence CATG), a codon ATG is read by aminoacyl tRNA (aa-tRNA). Aminoacyl tRNA is consequently carrying a different amino acid, because the anticodon on the aa-tRNA is different. The protein needed cannot be synthesized: depending on the site and severity of the frame shift, either a completely different protein is synthesized, or a protein similar to the one needed is synthesized, but is folded incorrectly. A bacterium is destroyed because it cannot produce any of its proteins correctly.[citation needed]

Kanamycin is not given to humans often because of its fairly toxic side-effects.

[edit] Side effects

Serious side effects include changes in hearing (either hearing loss or ringing in the ears), toxicity to kidneys, and allergic reactions to the drug.[2]

[edit] Use in research

Genes encoding kanamycin resistance are commonly used as selectable markers in molecular biology.[citation needed] At least one such gene, Atwbc19[3] is native to a plant species, of comparatively large size and its coded protein acts in a manner which decreases the possibility of Horizontal Gene Transfer from the plant to bacteria; it may be incapable of giving resistance to kanamycin to bacteria even if gene transfer occurs.

[edit] References

  1. ^ Garrod, L.P., et al.: "Antibiotic and Chemotherapy", page 131. Churchill Livingstone, 1981
  2. ^ Consumer Drug Information: Kanamycin, 2 April 2008, <http://www.drugs.com/cdi/kanamycin.html>. Retrieved on 4 May 2008 
  3. ^ Horizontal Gene Transfer: Plant vs. Bacterial Genes for Antibiotic Resistance Scenario's—What's the Difference?