The thermal impulse response of Escherichia coli

@article{citeulike:2744921, abstract = {Swimming Escherichia coli responds to changes in temperature by modifying its motor behavior. Previous studies using populations of cells have shown that E. coli accumulate in spatial thermal gradients, but these experiments did not cleanly separate thermal responses from chemotactic responses. Here we have isolated the thermal response by studying the behavior of single, tethered cells. The motor output of cells grown at 33{degrees}C was measured at constant temperature, from 10{degrees} to 40{degrees}C, and in response to small, impulsive increases in temperature, from 23{degrees} to 43{degrees}C. The thermal impulse response at temperatures < 31{degrees}C is similar to the chemotactic impulse response: Both follow a similar time course, share the same directionality, and show biphasic characteristics. At temperatures > 31{degrees}C, some cells show an inverted response, switching from warm- to cold-seeking behavior. The fraction of inverted responses increases nonlinearly with temperature, switching steeply at the preferred temperature of 37{degrees}C. 10.1073/pnas.0709903105}, author = {Paster, Eli and Ryu, William S. }, citeulike-article-id = {2744921}, doi = {10.1073/pnas.0709903105}, journal = {Proceedings of the National Academy of Sciences}, keywords = {adaptation, cell, clip2, ecoli, temperature}, month = {April}, number = {14}, pages = {5373--5377}, posted-at = {2008-05-02 11:20:31}, priority = {2}, title = {The thermal impulse response of Escherichia coli}, url = {http://dx.doi.org/10.1073/pnas.0709903105}, volume = {105}, year = {2008} }

TY - JOUR ID - citeulike:2744921 TI - The thermal impulse response of Escherichia coli JF - Proceedings of the National Academy of Sciences VL - 105 IS - 14 SP - 5373 EP - 5377 N2 - Swimming Escherichia coli responds to changes in temperature by modifying its motor behavior. Previous studies using populations of cells have shown that E. coli accumulate in spatial thermal gradients, but these experiments did not cleanly separate thermal responses from chemotactic responses. Here we have isolated the thermal response by studying the behavior of single, tethered cells. The motor output of cells grown at 33{degrees}C was measured at constant temperature, from 10{degrees} to 40{degrees}C, and in response to small, impulsive increases in temperature, from 23{degrees} to 43{degrees}C. The thermal impulse response at temperatures < 31{degrees}C is similar to the chemotactic impulse response: Both follow a similar time course, share the same directionality, and show biphasic characteristics. At temperatures > 31{degrees}C, some cells show an inverted response, switching from warm- to cold-seeking behavior. The fraction of inverted responses increases nonlinearly with temperature, switching steeply at the preferred temperature of 37{degrees}C. 10.1073/pnas.0709903105 KW - adaptation KW - cell KW - clip2 KW - ecoli KW - temperature AU - Paster, Eli AU - Ryu, William PY - 2008/04/08/ UR - http://dx.doi.org/10.1073/pnas.0709903105 ER -