Quantitative modeling of sensitivity in bacterial chemotaxis: the role of coupling among different chemoreceptor species. Export

@article{2003Mello, abstract = {We propose a general theoretical framework for modeling receptor sensitivity in bacterial chemotaxis, taking into account receptor interactions, including those among different receptor species. We show that our model can quantitatively explain the recent in vivo measurements of receptor sensitivity at different ligand concentrations for both mutant and wild-type strains. For mutant strains, our model can fit the experimental data exactly. For the wild-type cell, our model is capable of achieving high gain while having modest values of Hill coefficient for the response curves. Furthermore, the high sensitivity of the wild-type cell in our model is maintained for a wide range of ambient ligand concentrations, facilitated by near-perfect adaptation and dependence of ligand binding on receptor activity. Our study reveals the importance of coupling among different chemoreceptor species, in particular strong interactions between the aspartate (Tar) and serine (Tsr) receptors, which is crucial in explaining both the mutant and wild-type data. Predictions for the sensitivity of other mutant strains and possible improvements of our model for the wild-type cell are also discussed.}, address = {IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, NY 10598, USA.}, author = {Mello, B. A. and Tu, Y.}, citeulike-article-id = {1257797}, citeulike-linkout-0 = {http://dx.doi.org/10.1073/pnas.1330839100}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/12826616}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=12826616}, day = {8}, doi = {10.1073/pnas.1330839100}, issn = {0027-8424}, journal = {Proc Natl Acad Sci U S A}, keywords = {bacterial, chemoreceptor, chemotaxis, refs\_ox}, month = {July}, number = {14}, pages = {8223--8228}, posted-at = {2007-04-26 20:40:20}, priority = {2}, title = {Quantitative modeling of sensitivity in bacterial chemotaxis: the role of coupling among different chemoreceptor species.}, url = {http://dx.doi.org/10.1073/pnas.1330839100}, volume = {100}, year = {2003} }

TY - JOUR ID - 2003Mello L3 - citeulike-article-id:1257797 N2 - We propose a general theoretical framework for modeling receptor sensitivity in bacterial chemotaxis, taking into account receptor interactions, including those among different receptor species. We show that our model can quantitatively explain the recent in vivo measurements of receptor sensitivity at different ligand concentrations for both mutant and wild-type strains. For mutant strains, our model can fit the experimental data exactly. For the wild-type cell, our model is capable of achieving high gain while having modest values of Hill coefficient for the response curves. Furthermore, the high sensitivity of the wild-type cell in our model is maintained for a wide range of ambient ligand concentrations, facilitated by near-perfect adaptation and dependence of ligand binding on receptor activity. Our study reveals the importance of coupling among different chemoreceptor species, in particular strong interactions between the aspartate (Tar) and serine (Tsr) receptors, which is crucial in explaining both the mutant and wild-type data. Predictions for the sensitivity of other mutant strains and possible improvements of our model for the wild-type cell are also discussed. IS - 14 JF - Proc Natl Acad Sci U S A SN - 0027-8424 AD - IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, NY 10598, USA. EP - 8228 TI - Quantitative modeling of sensitivity in bacterial chemotaxis: the role of coupling among different chemoreceptor species. VL - 100 SP - 8223 KW - bacterial KW - chemoreceptor KW - chemotaxis KW - refs_ox AU - Mello, BA AU - Tu, Y PY - 2003/07/08/ UR - http://dx.doi.org/10.1073/pnas.1330839100 ER -