Kanamycin

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Not to be confused with kanamycin B.
Kanamycin
Kanamycin A.svg
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
Clinical data
AHFS/Drugs.com monograph
Pregnancy cat.
  • D
Legal status
  •  ?
Routes Oral, intravenous, intramuscular
Pharmacokinetic data
Bioavailability very low after oral delivery
Metabolism Unknown
Half-life 2 hours 30 minutes
Excretion Urine (as unchanged drug)
Identifiers
CAS number 59-01-8 YesY
ATC code A07AA08 J01GB04 S01AA24
PubChem CID 6032
DrugBank DB01172
ChemSpider 5810 YesY
UNII RUC37XUP2P YesY
ChEBI CHEBI:17630 YesY
ChEMBL CHEMBL1384 YesY
PDB ligand ID KAN (PDBe, RCSB PDB)
Chemical data
Formula C18H36N4O11 
Mol. mass 484.499
 YesY (what is this?)  (verify)

Kanamycin (also known as kanamycin A) is an aminoglycoside bacteriocidal antibiotic, available in oral, intravenous, and intramuscular forms, and used to treat a wide variety of infections. Kanamycin is isolated from the bacterium Streptomyces kanamyceticus[1] and its most commonly used form is kanamycin sulfate.

Spectrum of activity[edit]

Kanamycin has been used to treat infections caused by Gram-negative bacteria including E. coli, Proteus spp., Serratia marcescens, and Klebsiella pneumoniae. The following represents MIC susceptibility data for a few medically significant pathogens:

  • Escherichia coli - 0.05 μg/ml - >512 μg/ml
  • Klebsiella pneumoniae - 7.5 μg/ml - 128 μg/ml

[2]

Mechanism[edit]

Kanamycin interacts with the 30S subunit of prokaryotic ribosomes. It induces substantial amounts of mistranslation and indirectly inhibits translocation during protein synthesis.[3][4]

Composition[edit]

Kanamycin is a mixture of three main components: kanamycin A, B, and C. Kanamycin A is the major component in kanamycin. [5] The effects of these components do not appear to be widely studied as individual compounds when used against prokaryotic and eukaryotic cells.

Side effects[edit]

Serious side effects include tinnitus or loss of hearing, toxicity to kidneys, and allergic reactions to the drug.[6]

Use in research: kanamycin resistance[edit]

Kanamycin is used in molecular biology as a selective agent most commonly to isolate bacteria (e.g., E. coli) which have taken up genes (e.g., of plasmids) coupled to a gene coding for kanamycin resistance (primarily Neomycin phosphotransferase II [NPT II/Neo]). Bacteria that have been transformed with a plasmid containing the kanamycin resistance gene are plated on kanamycin (50-100 ug/ml) containing agar plates or are grown in media containing kanamycin (50-100 ug/ml). Only the bacteria that have successfully taken up the kanamycin resistance gene become resistant and will grow under these conditions. As a powder, kanamycin is white to off-white and is soluble in water (50 mg/ml).

At least one such gene, Atwbc19[7] 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 bacteria even if gene transfer occurs.

The KanMX marker[edit]

The selection marker kanMX is a hybrid gene consisting of a bacterial aminoglycoside phosphotransferase (kanr from transposon Tn903) under control of the strong TEF promoter from Ashbya gossypii.[8][9]

Mammalian cells, yeast, and other eukaryotes acquire resistance to geneticin (= G418, an aminoglycoside antibiotic similar to kanamycin) when transformed with a kanMX marker. In yeast, the kanMX marker avoids the requirement of auxotrophic markers. In addition, the kanMX marker renders E. coli resistant to kanamycin. In shuttle vectors the KanMX cassette is used with an additional bacterial promoter. Several versions of the kanMX cassette are in use, e.g. kanMX1-kanMX6. They primarily differ by additional restriction sites and other small changes around the actual open reading frame.[8][10]

References[edit]

  1. ^ Garrod, L.P., et al.: "Antibiotic and Chemotherapy", page 131. Churchill Livingstone, 1981
  2. ^ http://antibiotics.toku-e.com/antimicrobial_744_6.html
  3. ^ Pestka, S.: "The Use of Inhibitors in Studies on Protein Synthesis", Methods in Enzymology 30, pp.261-282, 1975
  4. ^ Misumi, M. & Tanaka, N.: "Mechanism of Inhibition of Translocation by Kanamycin and Viomycin: A Comparative Study with Fusidic Acid, Biochem.Biophys.Res.Commun. 92, pp.647-654, 1980
  5. ^ United States. National Institutes of Health. Kanamycin Compound Summary. PubChem. Web. 21 Aug. 2012.
  6. ^ Consumer Drug Information: Kanamycin, 2 April 2008, retrieved 2008-05-04 
  7. ^ "Horizontal Gene Transfer: Plant vs. Bacterial Genes for Antibiotic Resistance Scenario's—What's the Difference?". Isb.vt.edu. Retrieved 2013-06-24. 
  8. ^ a b Wach, A.; Brachat, A.; Pöhlmann, R.; Philippsen, P. (1994). "New heterologous modules for classical or PCR-based gene disruptions in Saccharomyces cerevisiae". Yeast (Chichester, England) 10 (13): 1793–1808. doi:10.1002/yea.320101310. PMID 7747518.  edit
  9. ^ Steiner, S.; Philippsen, P. (1994). "Sequence and promoter analysis of the highly expressed TEF gene of the filamentous fungus Ashbya gossypii". Molecular & general genetics : MGG 242 (3): 263–271. doi:10.1007/BF00280415. PMID 8107673.  edit
  10. ^ Wach, A. (1996). "PCR-synthesis of marker cassettes with long flanking homology regions for gene disruptions in S. Cerevisiae". Yeast 12 (3): 259–265. doi:10.1002/(SICI)1097-0061(19960315)12:3<259::AID-YEA901>3.0.CO;2-C. PMID 8904338.  edit

External links[edit]