Voget CE, Vita CE, Contreras Esquivel JC. One-step Concentration and Partial Purification of Aspergillus kawachii Non-acidic Polygalacturonases by Adsorption to Glass Fiber Microfilters.
Biotechnol Lett 2006;
28:233-9. [PMID:
16555006 DOI:
10.1007/s10529-005-5524-1]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2005] [Revised: 11/16/2005] [Accepted: 11/16/2005] [Indexed: 10/24/2022]
Abstract
The non-acidic polygalacturonases produced by Aspergillus kawachii in a glucose/tryptone medium were adsorbed to a glass fiber microfilter that was used to clarify the fermentation broth. Maximum adsorption occurred at pH 3 under low ionic strength conditions. The adsorbed activity could be readily released with a buffer solution at pH 5. Based upon these observations, a separation process was developed which enabled the broth to be clarified and, at the same time, the non-acidic polygalacturonases to be concentrated 20-fold and purified 100-fold in a unique filtration step. The practical advantage of recovering polygalacturonases by a filtration process lies in the simplicity and efficiency of the operation involved.
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