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Talanta. 2013 Mar 15;106:163-8. doi: 10.1016/j.talanta.2012.12.022. Epub 2012 Dec 22.

An assessment of the indirect high intensity ultrasonic assisted cleavage of complex proteomes with immobilized trypsin.

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1
Rheumatology Division, Proteomics Group-ProteoRed/ISCIII, INIBIC-CHUAC, A Coruña, Spain.

Abstract

The indirect high intensity ultrasonic assisted cleavage of complex proteomes using immobilized trypsin has been assessed. It has been found that the formation of aggregates between the beds supporting the immobilized trypsin is promoted. This affects the efficiency of the digestion process, which can be 100 times lower than the digestion efficiency obtained with in-solution trypsin. Through the use of isotopic peptide labelling with 18-O, it has been quantified that the digestion efficiency over serum samples can be 1.2-100 times higher for the 70% of the peptides when indirect ultrasonication is replaced by direct ultrasonication. Therefore, direct high intensity ultrasonic assisted cleavage of proteins is proposed as an alternative to be combined with immobilized trypsin.

PMID:
23598111
DOI:
10.1016/j.talanta.2012.12.022
[Indexed for MEDLINE]
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