Metabolic engineering of Rhodococcus jostii RHA1 for production of pyridine-dicarboxylic acids from lignin.
Metabolic engineering of Rhodococcus jostii RHA1 for production of pyridine-dicarboxylic acids from lignin.
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DOI:
10.1186/s12934-020-01504-z
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发表时间:
2021-01-19
影响因子:
6.4
通讯作者:
Bugg TDH
中科院分区:
文献类型:
--
作者:
Spence EM;Calvo-Bado L;Mines P;Bugg TDH
Genetic modification of Rhodococcus jostii RHA1 was carried out in order to optimise the production of pyridine-2,4-dicarboxylic acid and pyridine-2,5-dicarboxylic acid bioproducts from lignin or lignocellulose breakdown, via insertion of either the Sphingobium SYK-6 ligAB genes or Paenibacillus praA gene respectively. Insertion of inducible plasmid pTipQC2 expression vector containing either ligAB or praA genes into a ΔpcaHG R. jostii RHA1 gene deletion strain gave 2–threefold higher titres of PDCA production from lignocellulose (200–287 mg/L), compared to plasmid expression in wild-type R. jostii RHA1. The ligAB genes were inserted in place of the chromosomal pcaHG genes encoding protocatechuate 3,4-dioxygenase, under the control of inducible Picl or PnitA promoters, or a constitutive Ptpc5 promoter, producing 2,4-PDCA products using either wheat straw lignocellulose or commercial soda lignin as carbon source. Insertion of Amycolatopsis sp. 75iv2 dyp2 gene on a pTipQC2 expression plasmid led to enhanced titres of 2,4-PDCA products, due to enhanced rate of lignin degradation. Growth in minimal media containing wheat straw lignocellulose led to the production of 2,4-PDCA in 330 mg/L titre in 40 h, with > tenfold enhanced productivity, compared with plasmid-based expression of ligAB genes in wild-type R. jostii RHA1. Production of 2,4-PDCA was also observed using several different polymeric lignins as carbon sources, and a titre of 240 mg/L was observed using a commercially available soda lignin as feedstock.
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影响因子:
2.1
作者:
van der Geize, R;Hessels, GI;Dijkhuizen, L
通讯作者:
Dijkhuizen, L
影响因子:
3.2
作者:
Kasai, Daisuke;Fujinami, Toshihiro;Masai, Eiji
通讯作者:
Masai, Eiji
影响因子:
4
作者:
Sainsbury, Paul D.;Hardiman, Elizabeth M.;Bugg, Timothy D. H.
通讯作者:
Bugg, Timothy D. H.
影响因子:
8.4
作者:
Jones, Kristala L.;Kim, Seon-Won;Keasling, J. D.
通讯作者:
Keasling, J. D.
影响因子:
9.8
作者:
Salvachua, Davinia;Karp, Eric M.;Beckham, Gregg T.
通讯作者:
Beckham, Gregg T.