Document Detail

Design and use of multi-affinity surfaces in biomolecular interaction analysis-mass spectrometry (BIA/MS): a step toward the design of SPR/MS arrays.
MedLine Citation:
PMID:  12557234     Owner:  NLM     Status:  MEDLINE    
The feasibility of multi-affinity ligand surfaces in biomolecular interaction analysis-mass spectrometry (BIA/MS) was explored in this work. Multi-protein affinity surfaces were constructed by utilizing antibodies to beta-2-microglobulin, cystatin C, retinol binding protein, transthyretin, serum amyloid P and C-reactive protein. In the initial experiments, all six antibodies were immobilized on a single site (flow cell) on the sensor chip surface, followed by verification of the surface activity via separate injections of purified proteins. After an injection of diluted human plasma aliquot over the antibodies-derivatized surfaces, and subsequent MALDI-TOF MS analysis, signals representing five out of the six targeted proteins were observed in the mass spectra. Further, to avoid the complexity of the spectra, the six proteins were divided into two groups (according to their molecular weight) and immobilized on two separate surfaces on a single sensor chip, followed by an injection of human plasma aliquot. The resulting mass spectra showed signals from all proteins. Also, the convolution resulting from the multiply charged ion species was eliminated. The ability to create such multi-affinity surfaces indicates that smaller-size ligand areas/spots can be employed in the BIA/MS protein interaction screening experiments, and opens up the possibilities for construction of novel multi-arrayed SPR-MS platforms and methods for high-throughput parallel protein interaction investigations.
Dobrin Nedelkov; Randall W Nelson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of molecular recognition : JMR     Volume:  16     ISSN:  0952-3499     ISO Abbreviation:  J. Mol. Recognit.     Publication Date:    2003 Jan-Feb
Date Detail:
Created Date:  2003-01-30     Completed Date:  2004-02-11     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9004580     Medline TA:  J Mol Recognit     Country:  England    
Other Details:
Languages:  eng     Pagination:  15-9     Citation Subset:  IM    
Copyright Information:
Copyright 2003 John Wiley & Sons, Ltd.
Intrinsic Bioprobes Inc, 625 S. Smith Rd, Suite 22, Tempe, AZ 85281, USA.
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MeSH Terms
Biosensing Techniques
Proteins / analysis*
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / instrumentation*,  methods*
Surface Properties
Grant Support
Reg. No./Substance:
0/Ligands; 0/Proteins

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