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2014 ; 11
(12
): 1261-6
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Permanent genetic memory with 1-byte capacity
#MMPMID25344638
Yang L
; Nielsen AA
; Fernandez-Rodriguez J
; McClune CJ
; Laub MT
; Lu TK
; Voigt CA
Nat Methods
2014[Dec]; 11
(12
): 1261-6
PMID25344638
show ga
Genetic memory enables the recording of information in the DNA of living cells.
Memory can record a transient environmental signal or cell state that is then
recalled at a later time. Permanent memory is implemented using irreversible
recombinases that invert the orientation of a unit of DNA, corresponding to the
[0,1] state of a bit. To expand the memory capacity, we have applied
bioinformatics to identify 34 phage integrases (and their cognate attB and attP
recognition sites), from which we build 11 memory switches that are perfectly
orthogonal to each other and the FimE and HbiF bacterial invertases. Using these
switches, a memory array is constructed in Escherichia coli that can record 1.375
bytes of information. It is demonstrated that the recombinases can be layered and
used to permanently record the transient state of a transcriptional logic gate.
|*Gene Expression Regulation, Bacterial
[MESH]
|Bacteriophages/enzymology/*genetics
[MESH]
|Computational Biology
[MESH]
|DNA, Bacterial/*genetics
[MESH]
|DNA-Binding Proteins/genetics/metabolism
[MESH]
|Escherichia coli Proteins/*genetics
[MESH]
|Escherichia coli/genetics/growth & development
[MESH]