Minimally invasive determination of mRNA concentration in single living bacteria.
Minimally invasive determination of mRNA concentration in single living bacteria.
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DOI:
10.1093/nar/gkn329
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发表时间:
2008-07
影响因子:
14.9
通讯作者:
Cluzel, Philippe
中科院分区:
文献类型:
--
作者:
Guet, Calin C.;Bruneaux, Luke;Min, Taejin L.;Siegal-Gaskins, Dan;Figueroa, Israel;Emonet, Thierry;Cluzel, Philippe
Fluorescence correlation spectroscopy (FCS) has permitted the characterization of high concentrations of noncoding RNAs in a single living bacterium. Here, we extend the use of FCS to low concentrations of coding RNAs in single living cells. We genetically fuse a red fluorescent protein (RFP) gene and two binding sites for an RNA-binding protein, whose translated product is the RFP protein alone. Using this construct, we determine in single cells both the absolute [mRNA] concentration and the associated [RFP] expressed from an inducible plasmid. We find that the FCS method allows us to reliably monitor in real-time [mRNA] down to ∼40 nM (i.e. approximately two transcripts per volume of detection). To validate these measurements, we show that [mRNA] is proportional to the associated expression of the RFP protein. This FCS-based technique establishes a framework for minimally invasive measurements of mRNA concentration in individual living bacteria.
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DOI:
10.1073/pnas.0404443101
发表时间:
2004-08-03
影响因子:
11.1
作者:
Golding, I;Cox, EC
通讯作者:
Cox, EC
影响因子:
48
作者:
Valencia-Burton, Maria;McCullough, Ron M.;Broude, Natalia E.
通讯作者:
Broude, Natalia E.
影响因子:
14.9
作者:
PEABODY, DS;ELY, KR
通讯作者:
ELY, KR
影响因子:
11.4
作者:
PEDERSEN, S
通讯作者:
PEDERSEN, S
影响因子:
14.9
作者:
Lutz, R;Bujard, H
通讯作者:
Bujard, H