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2018 ; 10
(2
): 155-164
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Programmable autonomous synthesis of single-stranded DNA
#MMPMID29359755
Kishi JY
; Schaus TE
; Gopalkrishnan N
; Xuan F
; Yin P
Nat Chem
2018[Feb]; 10
(2
): 155-164
PMID29359755
show ga
DNA performs diverse functional roles in biology, nanotechnology and
biotechnology, but current methods for autonomously synthesizing arbitrary
single-stranded DNA are limited. Here, we introduce the concept of primer
exchange reaction (PER) cascades, which grow nascent single-stranded DNA with
user-specified sequences following prescribed reaction pathways. PER synthesis
happens in a programmable, autonomous, in situ and environmentally responsive
fashion, providing a platform for engineering molecular circuits and devices with
a wide range of sensing, monitoring, recording, signal-processing and actuation
capabilities. We experimentally demonstrate a nanodevice that transduces the
detection of a trigger RNA into the production of a DNAzyme that degrades an
independent RNA substrate, a signal amplifier that conditionally synthesizes long
fluorescent strands only in the presence of a particular RNA signal, molecular
computing circuits that evaluate logic (AND, OR, NOT) combinations of RNA inputs,
and a temporal molecular event recorder that records in the PER transcript the
order in which distinct RNA inputs are sequentially detected.