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2017 ; 18
(9
): 848-852
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Quantitative PCR is a Valuable Tool to Monitor the Performance of DNA-Encoded
Chemical Library Selections
#MMPMID28220596
Li Y
; Zimmermann G
; Scheuermann J
; Neri D
Chembiochem
2017[May]; 18
(9
): 848-852
PMID28220596
show ga
Phage-display libraries and DNA-encoded chemical libraries (DECLs) represent
useful tools for the isolation of specific binding molecules from large
combinatorial sets of compounds. With both methods, specific binders are
recovered at the end of affinity capture procedures by using target proteins of
interest immobilized on a solid support. However, although the efficiency of
phage-display selections is routinely quantified by counting the phage titer
before and after the affinity capture step, no similar quantification procedures
have been reported for the characterization of DECL selections. In this article,
we describe the potential and limitations of quantitative PCR (qPCR) methods for
the evaluation of selection efficiency by using a combinatorial chemical library
with more than 35 million compounds. In the experimental conditions chosen for
the selections, a quantification of DNA input/recovery over five orders of
magnitude could be performed, revealing a successful enrichment of abundant
binders, which could be confirmed by DNA sequencing. qPCR provided rapid
information about the performance of selections, thus facilitating the
optimization of experimental conditions.