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Arch Microbiol. 2013 Sep;195(9):655-60. doi: 10.1007/s00203-013-0917-3. Epub 2013 Aug 4.

Enterocin T, a novel class IIa bacteriocin produced by Enterococcus sp. 812.

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Department of Biotechnology, Ming Chuan University, No. 5 De-Ming Rd., Gui-Shan Township, Taoyuan, 333, Taiwan.


Enterococcus sp. 812, isolated from fresh broccoli, was previously found to produce a bacteriocin active against a number of Gram-positive bacteria, including Listeria monocytogenes. Bacteriocin activity decreased slightly after autoclaving (121 °C for 15 min), but was inactivated by protease K. Mass spectrometry analysis revealed the bacteriocin mass to be approximately 4,521.34 Da. N-terminal amino acid sequencing yielded a partial sequence, NH2-ATYYGNGVYXDKKKXWVEWGQA, by Edman degradation, which contained the consensus class IIa bacteriocin motif YGNGV in the N-terminal region. The obtained partial sequence showed high homology with some enterococcal bacteriocins; however, no identical peptide or protein was found. This peptide was therefore considered to be a novel bacteriocin produced by Enterococcus sp. 812 and was termed enterocin T.

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