PCR cloning of polyhydroxyalkanoate biosynthesis genes from Burkholderia caryophylli and their functional expression in recombinant Escherichia coli

被引:20
作者
Hang, XM
Zhang, G
Wang, GL
Zhao, XH
Chen, GQ [1 ]
机构
[1] Tsing Hua Univ, Dept Biol Sci & Biotechnol, Beijing 100084, Peoples R China
[2] Dalian Univ Technol, Dept Bioengn, Dalian 116024, Peoples R China
[3] Yunnan Univ, Dept Biol, Yunnan 650031, Peoples R China
关键词
PCR cloning; polyhydroxyalkanoate synthase; polyhydroxyalkanoate; polyhydroxybutyrate; Burkholderia caryophylli;
D O I
10.1111/j.1574-6968.2002.tb11158.x
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The PCR cloning strategy for type It polyhydroxyalkanoate (PHA) biosynthesis genes established previously for Pseudomonas was successfully applied to Burkholderia caryophylli strain AS 1.2741. The whole pha locus containing PHA synthase genes phaC1, phaC2 and PHA depolymerase gene phaZ was cloned. The complete open reading frames of phaC1(Bc), phaC2(Bc), and phaZ(Bc) were identified. Sequence analyses of the phaC1(Bc), phaZ(Bc), and phaC2(Bc), showed more than 77.7%, 73.7%, and 68.5% identities compared with the corresponding pha loci of the known Pseudomonas strains. respectively. The functional expression of the phaC1(Bc) or phaC2(Bc), in Escherichia coli strain KM32B (fadB deleted mutant) showed the abilities of PHA production by the estimated PHA synthase genes. Over 1% PHA consisting of 3-hydroxyhexanoate (3HHx), 3-hydroxyoctanoate (3140) and 3-hydroxydecanoate (3HD) was detected from cells of recombinant E. coli KM32B (pHXM11) harboring phaC1(Bc) grown on octanoate. At the same time over 3% of PHA consisting of 3HO and 3HD was produced from cells of recombinant E coli KM32B, (pHXM21) harboring phaC2(BC), grown on decanoate. Results showed the PCR cloning strategy developed previously can be applied to non-Pseudomonas strains such as Burkholderia in this case. This result also provided evidence for the presumption that the Burkholderia strain possesses not only polyhydroxybutyrate synthase genes, but also synthase for medium-chain-length polyhydroxyalkanoates consisting of 3HHx, 3HO and 3HD. (C) 2002 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:49 / 54
页数:6
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