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Glycogen Metabolism in Vibrio vulnificus Affected by malP and malQ

Glycogen Metabolism in Vibrio vulnificus Affected by malP and malQ

( Ah-reum Han ) , ( Yeon-ju Lee ) , ( Tianshi Wang ) , ( Jung-wan Kim )

- 발행기관 : 한국미생물생명공학회(구 한국산업미생물학회)

- 발행년도 : 2018

- 간행물 : 한국미생물·생명공학회지, 46권 1호

- 페이지 : pp.29-39 ( 총 11 페이지 )


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논문제목
초록(외국어)
Vibrio vulnificus needs various responsive mechanisms to survive and transmit successfully in alternative niches of human and marine environments, and to ensure the acquisition of steady energy supply to facilitate such unique life style. The bacterium had genetic constitution very different from that of Escherichia coli regarding metabolism of glycogen, a major energy reserve. V. vulnificus accumulated more glycogen than other bacteria and at various levels according to culture medium and carbon source supplied in excess. Glycogen was accumulated to the highest level in Luria-Bertani (3.08 mg/mg protein) and heart infusion (4.30 mg/mg protein) complex media supplemented with 1% (w/v) maltodextrin at 3 h into the stationary phase. Regarding effect of carbon source, more glycogen was accumulated when maltodextrin (2.34 mg/mg protein) was added than when glucose or maltose (0.78-1.14 mg/mg protein) was added as an excessive carbon source to M9 minimal medium, suggesting that maltodextrin metabolism might affect glycogen metabolism very closely. These results were supported by the analysis using the malP (encoding a maltodextrin phosphorylase) and malQ (encoding a 4-α-glucanotransferase) mutants, which accumulated much less glycogen than wild type when either glucose or maltodextrin was supplied as an excessive carbon source, but at different levels (3.1-80.3% of wild type glycogen). Therefore, multiple pathways for glycogen metabolism were likely to function in V. vulnificus and that responding to maltodextrin might be more efficient in synthesizing glycogen. All of the glycogen samples from 3 V. vulnificus strains under various conditions showed a narrow side chain length distribution with short chains (G4-G6) as major ones. Not only the comparatively large accumulation volume but also the structure of glycogen in V. vulnificus, compared to other bacteria, may explain durability of the bacterium in external environment.

논문정보
  • - 주제 : 자연과학분야 > 생물
  • - 발행기관 : 한국미생물생명공학회(구 한국산업미생물학회)
  • - 간행물 : 한국미생물·생명공학회지, 46권 1호
  • - 발행년도 : 2018
  • - 페이지 : pp.29-39 ( 총 11 페이지 )
  • - UCI(KEPA) : I410-ECN-0102-2018-400-004251957
저널정보
  • - 주제 : 자연과학분야 > 생물
  • - 성격 : 학술지
  • - 간기 : 계간
  • - 국내 등재 : KCI 등재
  • - 해외 등재 : - / SCOPUS
  • - ISSN : 1598-642x
  • - 수록범위 : 2002–2020
  • - 수록 논문수 : 1112