DMF-MALDI: droplet based microfluidic combined to MALDI-TOF for focused peptide detection.

Abstract:

:We present an automated droplet microfluidic system (DMF) to generate monitored nanoliter aqueous droplets in oil and their deposition on a commercial stainless steel plate for MALDI-TOF analysis of peptides or protein digests. We demonstrate that DMF-MALDI combination focuses the analyte on the MALDI plate, increasing considerably the homogeneity of the dried material. This results in a 30times enhanced MALDI-TOF MS signal for a model peptide, allowing a significant improvement of the detection sensitivity limit (down to few tens of attomoles). Moreover, positive detection can be achieved from sub-nanomolar peptides solutions and better overall protein sequence coverages are obtained from few tens attomoles of protein digest. These results make DMF-MALDI a promising approach for the treatment of peptides samples as well as a key component for an integrated approach in the proteomic field.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Mesbah K,Thai R,Bregant S,Malloggi F

doi

10.1038/s41598-017-06660-8

subject

Has Abstract

pub_date

2017-07-28 00:00:00

pages

6756

issue

1

issn

2045-2322

pii

10.1038/s41598-017-06660-8

journal_volume

7

pub_type

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