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Differences in S/G ratio in natural poplar variants do not predict catalytic depolymerization monomer yields.
Anderson, Eric M; Stone, Michael L; Katahira, Rui; Reed, Michelle; Muchero, Wellington; Ramirez, Kelsey J; Beckham, Gregg T; Román-Leshkov, Yuriy.
Afiliação
  • Anderson EM; Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames St, Cambridge, MA, 02139, USA.
  • Stone ML; Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames St, Cambridge, MA, 02139, USA.
  • Katahira R; National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver W Pkwy, Golden, CO, 80401, USA.
  • Reed M; National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver W Pkwy, Golden, CO, 80401, USA.
  • Muchero W; Oak Ridge National Laboratory, 1 Bethel Valley Rd, Oak Ridge, TN, 37830, USA.
  • Ramirez KJ; The Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
  • Beckham GT; National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver W Pkwy, Golden, CO, 80401, USA.
  • Román-Leshkov Y; National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver W Pkwy, Golden, CO, 80401, USA. Gregg.beckham@nrel.gov.
Nat Commun ; 10(1): 2033, 2019 05 02.
Article em En | MEDLINE | ID: mdl-31048697
The ratio of syringyl (S) and guaiacyl (G) units in lignin has been regarded as a major factor in determining the maximum monomer yield from lignin depolymerization. This limit arises from the notion that G units are prone to C-C bond formation during lignin biosynthesis, resulting in less ether linkages that generate monomers. This study uses reductive catalytic fractionation (RCF) in flow-through reactors as an analytical tool to depolymerize lignin in poplar with naturally varying S/G ratios, and directly challenges the common conception that the S/G ratio predicts monomer yields. Rather, this work suggests that the plant controls C-O and C-C bond content by regulating monomer transport during lignin biosynthesis. Overall, our results indicate that additional factors beyond the monomeric composition of native lignin are important in developing a fundamental understanding of lignin biosynthesis.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Reatores Biológicos / Populus / Lignina Tipo de estudo: Prognostic_studies / Risk_factors_studies Idioma: En Revista: Nat Commun Assunto da revista: BIOLOGIA / CIENCIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Reatores Biológicos / Populus / Lignina Tipo de estudo: Prognostic_studies / Risk_factors_studies Idioma: En Revista: Nat Commun Assunto da revista: BIOLOGIA / CIENCIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos