Complete genome sequence of acetate-producing Klebsiella pneumoniae L5-2 isolated from infant feces

3 Biotech
Yong-Soo ParkDong-Ho Seo

Abstract

Acetate is an important metabolite in infants as it can affect metabolism as well as immune and inflammatory responses. However, there have been no studies on acetate production by Klebsiella pneumoniae isolated from infant feces. In this study, we isolated a K. pneumoniae strain, L5-2, from infant feces, and we found it produces acetate. The genome of L5-2 consisted of a 5,237,123-bp single chromosome and a 139,211-bp single plasmid. The G + C content was 57.27%. By whole-genome analysis of K. pneumoniae L5-2, we identified seven genes related to acetate production (poxA, pta, eutD, ackA, eutP, eutQ, and adhE). We confirmed acetate production by K. pneumoniae L5-2 by ion chromatography. The aldehyde/alcohol dehydrogenase (adhE) activity of K. pneumoniae L5-2 was significantly higher than that of the K. pneumoniae subsp. ozaenae ATCC 11296. Thus, the acetate-producing ability of K. pneumoniae L5-2 was influenced by the adhE gene. In addition, K. pneumoniae L5-2 had significantly less virulence factor-encoding genes than other K. pneumoniae strains isolated from humans. In conclusion, K. pneumoniae L5-2 isolated from infant feces has less virulence factors and higher adhE activity than other K. pneumoniae strains.

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