Proximity ligation assays: a recent addition to the proteomics toolbox.

Abstract:

:An essential skill for every researcher is to learn how to select and apply the most appropriate methods for the questions they are trying to answer. With the extensive variety of methods available, it is increasingly important to scrutinize the advantages and disadvantages of these techniques prior to making a decision on which to use. In this article, we describe an approach to evaluate methods by reducing them into subcomponents. This is exemplified by a brief description of some commonly used proteomics methods. The same approach can also be used in method development by rearranging subcomponents in order to create new methods, as demonstrated with the development of proximity ligation assays (PLAs). PLA is a method as designed in our laboratory for detection of proteins, protein-protein interactions and post-translational modifications. Fundamentally, protein-recognition events are converted into detectable DNA molecules. The technique uses protein-DNA conjugates as binders for the targets of interest. Binding of two or more conjugates to the target results in assembly of an assay-specific DNA molecule. Subsequent amplification of the DNA molecule generates a signal that can be detected using PCR, for detection of minute amounts of proteins in serum, or standard fluorescence microscopy for detection of protein-protein interactions in tissue sections. Lastly, we apply the approach of recombining subcomponents to develop a few novel hypothetical methods hoping this might stimulate the readers to utilize this approach themselves.

journal_name

Expert Rev Proteomics

authors

Weibrecht I,Leuchowius KJ,Clausson CM,Conze T,Jarvius M,Howell WM,Kamali-Moghaddam M,Söderberg O

doi

10.1586/epr.10.10

subject

Has Abstract

pub_date

2010-06-01 00:00:00

pages

401-9

issue

3

eissn

1478-9450

issn

1744-8387

journal_volume

7

pub_type

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