Chemical Component Summary

FormulaC3 H6 N2 O2
Molecular Weight102.09
Isomeric SMILESN[C@@H]1CONC1=O

Chemical Details

Formal Charge0
Atom Count13
Chiral Atom Count1
Chiral AtomsCA
Bond Count13
Aromatic Bond Count0
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB00260 Different stereochemistry
DescriptionAntibiotic substance produced by Streptomyces garyphalus. [PubChem]
  • (+)-4-Amino-3-isoxazolidinone
  • (+)-Cycloserine
  • (R)-4-AMINO-isoxazolidin-3-one
  • alpha-Cycloserine
  • Cicloserina
Brand Names
  • Cycloserine
  • Seromycin
  • Seromycin Cap 250mg
  • Oxamycin
  • Tisomycin
Affected Organism
  • Enteric bacteria and other eubacteria
  • Mycobacterium tuberculosis
IndicationUsed in combination with up to 5 other drugs as a treatment for Mycobacterium avium complex (MAC) and is also used to treat tuberculosis (TB).
PharmacologyCycloserine, a broad-spectrum antibiotic, may be bactericidal or bacteriostatic, depending on its concentration at the site of infection and the susceptibility of the organism. Cycloserine works by blocking the formation of these peptidoglycans. By doing this the walls of the bacteria become weak and it results in the death of the bacteria
Mechanism of actionCycloserine is an analog of the amino acid D-alanine. It interferes with an early step in bacterial cell wall synthesis in the cytoplasm by competitive inhibition of two enzymes, L-alanine racemase, which forms D-alanine from L-alanine, and D-alanylalanine synthetase, which incorporates D-alanine into the pentapeptide necessary for peptidoglycan formation and bacterial cell wall synthesis.
Route of administrationOral
  • Amino Acids
  • Amino Acids, Neutral
  • Amino Acids, Peptides, and Proteins
  • Anti-Bacterial Agents
  • Anti-Infective Agents
CAS number68-41-7
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682