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Original scientific paper

Povećanje proizvodnje metabolita vitamina K2 dodatkom surfaktanta pri uzgoju mutanta bakterije Escherichia sp. FM3-1709 na tresilici

Yan Liu ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Zhi-Ming Zheng ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Hong-Wei Qiu ; National Center for Biotechnology Development, 100036 Beijing, PR China
Gen-Hai Zhao ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Peng Wang ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Hui Liu ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Li Wang ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Zhe-Min Li ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
He-Fang Wu ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Hong-Xia Liu ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China
Mu Tan ; Key Laboratory of Ion Beam Bioengineering, Chinese Academy of Sciences, Anhui, 230031 Hefei, PR China


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Abstract

Ispitan je utjecaj dodatka različitih surfaktanata na rast stanica i proizvodnju metabolita vitamina K2, poput unutarstaničnih i izvanstaničnih menakinona MK-4 i MK-6, pri submerznom uzgoju bakterije Escherichia sp. Svi su surfaktanti produljili eksponencijalnu
fazu rasta bakterije. Betain, polioksietilen oleil eter i Tween-80 povoljno su djelovali na rast stanica mutanta bakterije Escherichia sp. FM3-1709. Najveći je rast stanica bio Xmax=(12,6±0,2) g/L, najveća stopa proizvodnje biomase Qx=(0,21±0,01) g/(L·h), a najveći prinos biomase YX/S=(2,42±0,02) g/g. Rezultati pokazuju da se dodatkom surfaktanata smanjila proizvodnja unutarstaničnog MK-4, dok se proizvodnja izvanstaničnog MK-4 bitno povećala. Od pet ispitanih surfaktanata, najbolji su rezultati postignuti dodatkom neionskog surfaktanta polioksietilen oleil etera (1,0 g/L), pri čemu je koncentracija izvanstaničnog MK-4 bila (33,6±0,4) mg/L, a izvanstaničnog MK-6 (2,56±0,07) mg/L, dok je ukupni prinos MK-4
bio (47,6±0,4) mg/L, a MK-6 (6,0±0,1) mg/L. Dodatak je polioksilen oleil etera djelovao puno povoljnije na lučenje MK-4, nego na lučenje MK-6.

Keywords

surfaktant; vitamin K2; uzgoj na tresilici

Hrčak ID:

126170

URI

https://hrcak.srce.hr/126170

Publication date:

15.9.2014.

Article data in other languages: english

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