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Volumn 17, Issue 5, 2007, Pages 1428-1431

Ac2-DPD, the bis-(O)-acetylated derivative of 4,5-dihydroxy-2,3-pentanedione (DPD) is a convenient stable precursor of bacterial quorum sensing autoinducer AI-2

Author keywords

AI 2; Autoinducer; DPD; Quorum sensing

Indexed keywords

4,5 DIHYDROXY 2,3 PENTANEDIONE; ACETIC ACID DERIVATIVE; ACETYLACETONE; BETA GALACTOSIDASE; UNCLASSIFIED DRUG; 4,5-DIHYDROXY-2,3-PENTANEDIONE; DRUG DERIVATIVE; HOMOSERINE; LACTONE; N OCTANOYLHOMOSERINE LACTONE; N-OCTANOYLHOMOSERINE LACTONE; PENTANE;

EID: 33846948980     PISSN: 0960894X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.bmcl.2006.11.076     Document Type: Article
Times cited : (29)

References (24)
  • 16
    • 33846996582 scopus 로고    scopus 로고
    • note
    • Racemic and (S)-DPD were prepared according to Refs. 7,6, respectively.
  • 17
    • 33846950924 scopus 로고    scopus 로고
    • note
    • 2O) corresponding to the 2 diastereotopic H of the methylene group (C-5) at 4.24 and 4.44 ppm for (S)-8 and at 4.14 ppm for3 or to the hemiketalic methyl groups (2 diasteroisomers) at 1.39 and 1.42 ppm for DPD. The precision for integration measurements is about 5%. At low concentrations of DPD (ca. 10%) no accurate values can be given by this method because the intensity of DPD signals is weak due to its equilibrium between three species.
  • 19
    • 33846964991 scopus 로고    scopus 로고
    • note
    • - 1.
  • 22
    • 33846946246 scopus 로고    scopus 로고
    • note
    • 15 reporter strains, respectively. The luminescent reporter strain V. harveyi BB170 was grown for 18 h at 30 °C, with aeration, in AB medium and was diluted 1:5000 into fresh AB medium. The S. typhimurium MET844 strain was grown for 18 h at 37 °C in Luria Bertani (LB) medium and diluted 1:100 in LB. Next, DPD or 8 was added to each diluted bacterial cell suspension at a 10% (v/v) final concentration, and then shaken at 30 °C (V. harveyi) or 37 °C (S. typhimurium) for 4 h. The backgrounds were determined by the addition of sterile medium to diluted bacterial cell suspensions. After the incubation period, the resulting light or β-galactosidase production was measured with a luminometer, directly or using the beta-Gal reporter gene assay (chemiluminescent) (Roche, Mannheim, Germany), and activity was expressed as relative units of luminescence (RLU) per second.
  • 24
    • 33847004855 scopus 로고    scopus 로고
    • note
    • 17 Briefly, microtiter plates were inoculated with a diluted overnight preculture of the strain 407 of B. cereus. Synthetic (S)-DPD or (S)-8 were subsequently added to the microtiter wells and biofilm density was measured after 24 h of incubation as follows: the microtiter plate wells were washed with phosphate-buffered saline, and bound cells were stained with a 1% (wt/vol) crystal violet solution at room temperature for 20 min. The wells were then washed and the dye was solubilized with a 20:80 acetone/ethanol mixture. The absorbance at 600 nm of the solubilized dye was then determined. Assays were performed triplicate.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.