Purification of hyperthermophilic archaeal amylolytic enzyme (MJA1) using thermoseparating aqueous two-phase systems

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Purification of a recombinant, thermostable α-amylase (MJA1) from the hyperthermophile, Methanococcus jannaschii, was investigated in the ethylene oxide-propylene oxide random copolymer (PEO-PPO)/(NH4) 2SO4, and poly(ethylene glycol) (PEG)/(NH 4)2SO4 aqueous two-phase systems. MJA1 partitioned in the top polymer-rich phase, while the remainder of proteins partitioned in the bottom salt-rich phase. It was found that enzyme recovery of up to 90% with a purification factor of 3.31 was achieved using a single aqueous two-phase extraction step. In addition, the partition behavior of pure amyloglucosidase in polymer/salt aqueous two-phase systems was also evaluated. All of the studied enzymes partitioned unevenly in these polymer/salt systems. This work is the first reported application of thermoseparating polymer aqueous two-phase systems for the purification of extremophile enzymes.

Original languageEnglish (US)
Pages (from-to)69-74
Number of pages6
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Issue number1
StatePublished - Jul 25 2004
Event12th International Conference on Biopartitioning and Purif. - Vancouver,BC, Canada
Duration: Jun 1 2003Jun 1 2003

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology


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