Characterization of Expression and Stability of Recombinant Cystein-Rich Protein Human MT1A from Yeast

Author(s): Li Jie, Shao Kaifeng, Yao Dian, An Lin, Ru Binggen.

Journal Name: Protein & Peptide Letters

Volume 12 , Issue 6 , 2005

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Abstract:

Metallothionein (MT) is the protein that has been shown to bind heavy metals, scavenge free radicals, protect DNA from radiation damage, and alleviate disease symptoms. However, only very limited success has been achieved in expression and production of active recombinant metallothionein. In this study, human metallothionein 1A (hMT1A) was transformed into yeast Pichia pastoris for expression with secretion of the protein into the medium. The expression system was optimized to obtain the targeted protein in active form at 335mg per litre culture. hMT1A showed the character of extreme instability in the experiment. High concentration, aeration and heavy metal ions are the main factors affecting hMT1A stability.

Keywords: human metallothionein a, secret expression, stability, polymerization, purification, pichia pastoris, yeast, function

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Article Details

VOLUME: 12
ISSUE: 6
Year: 2005
Page: [567 - 571]
Pages: 5
DOI: 10.2174/0929866054395734
Price: $65

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