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Title: N-acyl homoserine lactone production by Klebsiella pneumonia isolated from human tongue surface
Authors: Yin, Wai Fong
Kathiravan Purmal
Chin, Shenyang
Chan, Xin Yue
Koh, Chong Lek
Sam, Choon Kook
Chan, Kok Gan
Keywords: N-acylhomoserine lactone
N-3-dodecanoyl-L-homoserine lactone (C12-HSL)
N-heptanoyl-L-homoserine lactone (C7-HSL)
N-octanoyl-L-homoserine lactone (C8-HSL)
Oral cavity
Posterior dorsal surface
Quorum sensing
Issue Date: 2012
Citation: Yin, W. F., Purmal, K., Chin, S., Chan, X. Y., Koh, C. L., Sam, C. K., & Chan, K. G. (2012). N-acyl homoserine lactone production by Klebsiella pneumoniae isolated from human tongue surface. Sensors, 12(3), 3472-3483.
Abstract: Bacteria communicate by producing quorum sensing molecules called autoinducers, which include autoinducer-1, an N-hexanoyl homoserine lactone (AHL), and autoinducer-2. Bacteria present in the human oral cavity have been shown to produce autoinducer-2, but not AHL. Here, we report the isolation of two AHL-producing Klebsiella pneumoniae strains from the posterior dorsal surface of the tongue of a healthy individual. Spent culture supernatant extracts from K. pneumoniae activated the biosensors Agrobacterium tumefaciens NTL4(pZLR4) and Escherichia coli [pSB401], suggesting the presence of both long and short chain AHLs. High resolution mass spectrometry analyses of these extracts confirmed that both K. pneumoniae isolates produced N-octanoylhomoserine lactone and N-3-dodecanoyl-L-homoserine lactone. To the best of our knowledge, this is the first report of the isolation of K. pneumoniae from the posterior dorsal surface of the human tongue and the production of these AHLs by this bacterium.
ISSN: 1424-8220
Other Identifiers: 10.3390/s120303472
Appears in Collections:Journal Articles

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