Hydrolysis of cellulose in synergistic mixtures of β-glucosidase and endo/exocellulase Cel9A from Thermobifida fusca

Jiun L. Chir, Chin Feng Wan, Chien Hung Chou, An-Tai Wu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The synergism between the endo/exocellulase, Cel9A, and β-glucosidase (βgl) of Thermobifida fusca was investigated. Wild type βgl or S319C, a βgl mutant with significantly improved cellobiase activity, were added to Cel9A. Both wild type and mutant βgl enhanced the Cel9A hydrolysis of carboxymethyl cellulose (CMC) and filter paper by 50-100% compared to Cel9A alone. No enhancement occurred with addition of E388A, an inactive form of βgl. HPLC analysis showed that, with Cel9A alone, the resulting hydrolysate of glucose and cellobiose contained about half glucose; after addition of equimolar amounts of either wild type βgl or mutant S319C to Cel9A, the hydrolysate contained more than 85% glucose. βgl thus acted synergistically with Cel9A by converting cello-oligomers to glucose; this reduced the soluble sugar accumulation during hydrolysis of cellulose.

Original languageEnglish
Pages (from-to)777-782
Number of pages6
JournalBiotechnology Letters
Volume33
Issue number4
DOIs
Publication statusPublished - 2011 Apr 1

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Glucosidases
Cellulases
Cellulose
Hydrolysis
Glucose
Cellobiose
Carboxymethylcellulose Sodium
beta-Glucosidase
Oligomers
Sugars
High Pressure Liquid Chromatography

All Science Journal Classification (ASJC) codes

  • Biotechnology

Cite this

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title = "Hydrolysis of cellulose in synergistic mixtures of β-glucosidase and endo/exocellulase Cel9A from Thermobifida fusca",
abstract = "The synergism between the endo/exocellulase, Cel9A, and β-glucosidase (βgl) of Thermobifida fusca was investigated. Wild type βgl or S319C, a βgl mutant with significantly improved cellobiase activity, were added to Cel9A. Both wild type and mutant βgl enhanced the Cel9A hydrolysis of carboxymethyl cellulose (CMC) and filter paper by 50-100{\%} compared to Cel9A alone. No enhancement occurred with addition of E388A, an inactive form of βgl. HPLC analysis showed that, with Cel9A alone, the resulting hydrolysate of glucose and cellobiose contained about half glucose; after addition of equimolar amounts of either wild type βgl or mutant S319C to Cel9A, the hydrolysate contained more than 85{\%} glucose. βgl thus acted synergistically with Cel9A by converting cello-oligomers to glucose; this reduced the soluble sugar accumulation during hydrolysis of cellulose.",
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Hydrolysis of cellulose in synergistic mixtures of β-glucosidase and endo/exocellulase Cel9A from Thermobifida fusca. / Chir, Jiun L.; Wan, Chin Feng; Chou, Chien Hung; Wu, An-Tai.

In: Biotechnology Letters, Vol. 33, No. 4, 01.04.2011, p. 777-782.

Research output: Contribution to journalArticle

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AB - The synergism between the endo/exocellulase, Cel9A, and β-glucosidase (βgl) of Thermobifida fusca was investigated. Wild type βgl or S319C, a βgl mutant with significantly improved cellobiase activity, were added to Cel9A. Both wild type and mutant βgl enhanced the Cel9A hydrolysis of carboxymethyl cellulose (CMC) and filter paper by 50-100% compared to Cel9A alone. No enhancement occurred with addition of E388A, an inactive form of βgl. HPLC analysis showed that, with Cel9A alone, the resulting hydrolysate of glucose and cellobiose contained about half glucose; after addition of equimolar amounts of either wild type βgl or mutant S319C to Cel9A, the hydrolysate contained more than 85% glucose. βgl thus acted synergistically with Cel9A by converting cello-oligomers to glucose; this reduced the soluble sugar accumulation during hydrolysis of cellulose.

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