ecoli.processes.chemotaxis.flagella_motor
Flagella Motor Processes
FlagellaMotor
process generates thrust and torque based on number of
flagella and their individual motor states.
References
- CheY phosphorylation model from:
Kollmann, M., Lovdok, L., Bartholome, K., Timmer, J., & Sourjik, V. (2005). Design principles of a bacterial signalling network. Nature.
- Veto model of motor activity from:
Mears, P. J., Koirala, S., Rao, C. V., Golding, I., & Chemla, Y. R. (2014). Escherichia coli swimming is robust against variations in flagellar number. Elife.
- Rotational state of an individual flagellum from:
Sneddon, M. W., Pontius, W., & Emonet, T. (2012). Stochastic coordination of multiple actuators reduces latency and improves chemotactic response in bacteria.
- class ecoli.processes.chemotaxis.flagella_motor.FlagellaMotor(parameters=None)[source]
Bases:
Process
Flagellar motor activity
- Ports:
internal_counts
flagella
internal
boundary
membrane
-
defaults: Dict[str, Any]
{ 'K_D': 3.06, 'adapt_precision': 8, 'ccw_to_cw_leak': 0.2, 'flagellum_thrust': 0.31066746727980593, 'g_0': 40, 'g_1': 40, 'gamma_y': 0.1, 'initial_state': { 'boundary': {'thrust': 0, 'torque': 0}, 'internal': { 'CheA': 1.0, 'CheY': 2.59, 'CheY_P': 2.59, 'CheZ': 1.0, 'chemoreceptor_activity': 0.3333333333333333, 'motile_state': 1}, 'membrane': {'PMF': -140}}, 'k_s': 0.45, 'k_y': 100.0, 'k_z': 30.0, 'n_flagella': 4, 'omega': 1.3, 'run_scaling': -0.007142857142857143, 'seed': 0, 'time_step': 0.01, 'tumble_jitter': 60.0, 'tumble_scaling': -0.0035714285714285713}
- expected_flagella = 4
- expected_pmf = -140
- expected_thrust = 0.5
- name = 'flagella_motor'
- run(n_flagella, PMF)[source]
thrust scales with log(n_flagella) because only the thickness of the bundle is affected
- ecoli.processes.chemotaxis.flagella_motor.get_chemoreceptor_activity_timeline(total_time=2, time_step=0.01, rate=1.0, initial_value=0.3333333333333333)[source]
- ecoli.processes.chemotaxis.flagella_motor.plot_activity(data, settings=None, out_dir='out', filename='motor_control')[source]