Protein Identification Using Receptor Arrays and Mass Spectrometry

  • Timothy R. Langlois
  • Richard W. Vachet
  • Ramgopal R. Mettu
Conference paper

DOI: 10.1007/978-1-4419-5913-3_39

Volume 680 of the book series Advances in Experimental Medicine and Biology (AEMB)
Cite this paper as:
Langlois T.R., Vachet R.W., Mettu R.R. (2010) Protein Identification Using Receptor Arrays and Mass Spectrometry. In: Arabnia H. (eds) Advances in Computational Biology. Advances in Experimental Medicine and Biology, vol 680. Springer, New York, NY

Abstract

Mass spectrometry is one of the main tools for protein identification in complex mixtures. When the sequence of the protein is known, we can check to see if the known mass distribution of peptides for a given protein is present in the recorded mass distribution of the mixture being analyzed. Unfortunately, this general approach suffers from high false-positive rates, since in a complex mixture, the likelihood that we will observe any particular mass distribution is high, whether or not the protein of interest is in the mixture. In this paper, we propose a scoring methodology and algorithm for protein identification that make use of a new experimental technique, which we call receptor arrays, for separating a mixture based on another differentiating property of peptides called isoelectric point (pI). We perform extensive simulation experiments on several genomes and show that additional information about peptides can achieve an average 30% reduction in false-positive rates over existing methods, while achieving very high true-positive identification rates.

Keywords

Receptor Array Mass Spectrometry Protein Identification Isoelectric Point 

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Timothy R. Langlois
  • Richard W. Vachet
  • Ramgopal R. Mettu
    • 1
  1. 1.University of MassachusettsAmherstUSA