Fludalanine - CAS 35523-45-6
Catalog number: 35523-45-6
Category: Inhibitor
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Molecular Formula:
Molecular Weight:
Fludalanine, an analogue of D-alanine that irreversibly inactivates the racemase, inhibits the synthetase.
White powder
MK641; MK641; MK641; Fludalanine; 3-Fluoro-D-(2-2H)alanine;(S)-2-amino-3-fluoropropanoic-2-d acid;
Soluble in DMSO
Store at -20 °C
Quality Standard:
Enterprise standard
Shelf Life:
As supplied, 2 years from the QC date provided on the Certificate of Analysis, when stored properly.
Canonical SMILES:
Current Developer:
1.Experimental pneumonia due to Haemophilus influenzae: observations on pathogenesis and treatment.
Esposito AL;Pennington JE J Infect Dis. 1984 May;149(5):728-34.
A model of pneumonia due to Haemophilus influenzae type b was developed in mice and used for exploration of the pathophysiology of the infection and evaluation of the efficacy of five antimicrobial agents. Adult C57BL/6 mice were challenged with 3 X 10(9) cfu of H influenzae by intratracheal inoculation. Mice given placebo or no treatment experienced a uniformly bacteremic and fatal infection. Animals given ampicillin, cefamandole, chloramphenicol, erythromycin plus sulfisoxazole, or fludalanine plus pentizidone (MK 0641/MK 0642, an investigational combination drug) survived at a higher rate than did controls (P less than .001 at 72 hr for each antibiotic). However, survival rates for the various antibiotic-treated groups were similar. Viable organisms were eradicated from the lungs of antibiotic-treated mice more quickly than from the lungs of controls (P less than .001 at 24 hr for each drug). Studies of pulmonary clearance revealed significant differences among regimens; the order of efficacy (from most to least) was ampicillin, chloramphenicol, erythromycin/sulfisoxazole, cefamandole, and fludalanine / pentizidone . This model represents an appropriate system for evaluation of invasive pulmonary infection caused by H influenzae type b.
2.Simultaneous quantification of cycloserine and its prodrug acetylacetonylcycloserine in plasma and urine by high-performance liquid chromatography using ultraviolet absorbance and fluorescence after post-column derivatization.
Musson DG;Maglietto SM;Hwang SS;Gravellese D;Bayne WF J Chromatogr. 1987 Feb 20;414(1):121-9.
D-Cycloserine is a broad-spectrum antibiotic used with other antibiotics to treat various forms of tuberculosis. Its prodrug sodium (R)-4-[(1-methyl-3-oxo-1-butenyl)amino]-3-isoxazolidinone hemihydrate, developed for better aqueous stability and solubility, is combined with another broad-spectrum antibiotic, fludalanine. An ion-pair, reversed-phase high-performance liquid chromatographic assay has been developed to simultaneously detect cycloserine and its prodrug in plasma and urine. The prodrug is detected directly by ultraviolet absorbance and cycloserine by fluorescence following post-column derivatization.
3.A single assay for simultaneously testing effectors of alanine racemase and/or D-alanine: D-alanine ligase.
Vicario PP;Green BG;Katzen HM J Antibiot (Tokyo). 1987 Feb;40(2):209-16.
The biosynthesis from L-alanine of D-alanyl-D-alanine, required for the peptidoglycan layer of the cell wall of many bacterial species, is catalyzed by two enzymes in series, alanine racemase and D-alanine: D-alanine ligase. A simple in vitro method, called the combined assay, for simultaneously testing for effectors of either or both enzymes in a single assay by coupling these enzymes to each other is described here. The experiments used to derive the optimum conditions for the assay are also described. Each enzyme is included in the assay in rate-limiting amounts, wherein the product of the initial racemase reaction, D-alanine, becomes the substrate for the subsequent ligase. The product of the overall reaction, [14C]-D-alanyl-D-alanine, is separated chromatographically from the L-[1-14C]alanine substrate, and from any D-[1-14C]alanine intermediate, at the end of the incubation, is counted and the percent conversion of substrate to product calculated. The inhibitory effects of 3-fluoro-D-alanine-2d, a known inhibitor of the racemase, and D-cycloserine and DL-1-aminoethylphosphonic acid, inhibitors of both enzymes, were readily detectable. The sensitivity of the combined assay to these inhibitors appears similar to that of earlier assays.
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CAS 35523-45-6 Fludalanine

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