dorsal/arxiv
View SchemaAdaptive Ising Model and Bacterial Chemotactic Receptor Network
| Authors | Yu Shi |
|---|---|
| Categories | |
| ArXiv ID | physics/9901053 |
| URL | https://arxiv.org/abs/physics/9901053 |
| DOI | 10.1209/epl/i2000-00243-1 |
| Journal | Europhysics Letters 50(1) (2000) 113-119 |
Abstract
We present a so-called adaptive Ising model (AIM) to provide a unifying explanation for sensitivity and perfect adaptation in bacterial chemotactic signalling, based on coupling among receptor dimers. In an AIM, an external field, representing ligand binding, is randomly applied to a fraction of spins, representing the states of the receptor dimers, and there is a delayed negative feedback from the spin value on the local field. This model is solved in an adiabatic approach. If the feedback is slow and weak enough, as indeed in chemotactic signalling, the system evolves through quasi-equilibrium states and the ``magnetization'', representing the signal, always attenuates towards zero and is always sensitive to a subsequent stimulus.
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"abstract": "We present a so-called adaptive Ising model (AIM) to provide a unifying\nexplanation for sensitivity and perfect adaptation in bacterial chemotactic\nsignalling, based on coupling among receptor dimers. In an AIM, an external\nfield, representing ligand binding, is randomly applied to a fraction of spins,\nrepresenting the states of the receptor dimers, and there is a delayed negative\nfeedback from the spin value on the local field. This model is solved in an\nadiabatic approach. If the feedback is slow and weak enough, as indeed in\nchemotactic signalling, the system evolves through quasi-equilibrium states and\nthe ``magnetization\u0027\u0027, representing the signal, always attenuates towards zero\nand is always sensitive to a subsequent stimulus.",
"arxiv_id": "physics/9901053",
"authors": [
"Yu Shi"
],
"categories": [
"physics.bio-ph",
"cond-mat",
"q-bio.MN"
],
"doi": "10.1209/epl/i2000-00243-1",
"journal_ref": "Europhysics Letters 50(1) (2000) 113-119",
"title": "Adaptive Ising Model and Bacterial Chemotactic Receptor Network",
"url": "https://arxiv.org/abs/physics/9901053"
},
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