Optimal inference of molecular interaction dynamics in FRET microscopy.
Optimal inference of molecular interaction dynamics in FRET microscopy.
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FRET显微镜中分子相互作用动力学的最佳推断。
DOI:
10.1073/pnas.2211807120
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发表时间:
2023-04-11
影响因子:
11.1
通讯作者:
中科院分区:
文献类型:
--
作者:
Signal-to-noise ratio (SNR) limits what we can learn from data. In fluorescence microscopy, SNR is set by the number of photons acquired from a sample and the efficiency with which these photon are used in data analysis. Experimental configurations that determine the former tend to be highly optimized, whereas analysis methods to maximize the latter remain comparatively underexplored. This is the case for intensity-based, time-lapse fluorescence resonance energy transfer (FRET) microscopy, a powerful method for quantifying the dynamics of molecular interactions inside cells. Here, we develop an information-theoretically optimal method to estimate molecular interaction from such FRET data that maximizes SNR. Like bright fluorescent proteins and sensitive photodetectors, the method expands the scope of FRET microscopy by significantly improving SNR. Intensity-based time-lapse fluorescence resonance energy transfer (FRET) microscopy has been a major tool for investigating cellular processes, converting otherwise unobservable molecular interactions into fluorescence time series. However, inferring the molecular interaction dynamics from the observables remains a challenging inverse problem, particularly when measurement noise and photobleaching are nonnegligible—a common situation in single-cell analysis. The conventional approach is to process the time-series data algebraically, but such methods inevitably accumulate the measurement noise and reduce the signal-to-noise ratio (SNR), limiting the scope of FRET microscopy. Here, we introduce an alternative probabilistic approach, B-FRET, generally applicable to standard 3-cube FRET-imaging data. Based on Bayesian filtering theory, B-FRET implements a statistically optimal way to infer molecular interactions and thus drastically improves the SNR. We validate B-FRET using simulated data and then apply it to real data, including the notoriously noisy in vivo FRET time series from individual bacterial cells to reveal signaling dynamics otherwise hidden in the noise.
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影响因子:
64.8
作者:
Alon, U;Surette, MG;Leibler, S
通讯作者:
Leibler, S
影响因子:
8.8
作者:
Emrich SM;Yoast RE;Xin P;Arige V;Wagner LE;Hempel N;Gill DL;Sneyd J;Yule DI;Trebak M
通讯作者:
Trebak M
影响因子:
16.6
作者:
Babel, Heiko;Naranjo-Meneses, Pablo;Bischofs, Ilka B.
通讯作者:
Bischofs, Ilka B.
影响因子:
3.4
作者:
Gordon, GW;Berry, G;Herman, B
通讯作者:
Herman, B
影响因子:
3.5
作者:
Chen, Huanmian;Puhl, Henry L., III;Ikeda, Stephen R.
通讯作者:
Ikeda, Stephen R.