Novel, Thermostable Family-13-Like Glycoside Hydrolase from Methanococcus jannaschii

J. W. Kim, H. A. Terc, L. O. Flowers, M. Whiteley, T. L. Peeples

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A novel glycoside hydrolase from the hyperthermophilic archaeon Methanococcus jannaschii has been cloned into Escherichia coli. Extremely thermoactive and thermostable amylolytic activity was confirmed in partially purified enzyme solution. This enzyme exhibited a temperature optimum of 100°C and a pH optimum pH 5.0-8.0. Hydrolysis of large 1,6-α- and 1,4-α-linked polysaccharides yielded glucose polymers of 1-7 units. Incubation with amylose displayed the highest activity. The catalyst was activated and stabilized by Ca2+ and exhibited extreme thermostability at 100°C with a half-life of 78 h.

Original languageEnglish (US)
Pages (from-to)475-481
Number of pages7
JournalFolia Microbiologica
Issue number6
StatePublished - 2001

All Science Journal Classification (ASJC) codes

  • Microbiology


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