Number of mechanical step of a single torque generating unit (in flagellar motor) per revolution
| Range | ≈50 Steps/revolution |
|---|---|
| Organism | Bacteria Escherichia coli |
| Reference | Gabel CV, Berg HC. The speed of the flagellar rotary motor of Escherichia coli varies linearly with protonmotive force. Proc Natl Acad Sci U S A. 2003 Jul 22 100(15):8748-51. p.8751 left column 3rd paragraphPubMed ID12857945 |
| Primary Source | Samuel AD, Berg HC. Torque-generating units of the bacterial flagellar motor step independently. Biophys J. 1996 Aug71(2):918-23.PubMed ID8842231 |
| Comments | "...[assuming] tight coupling, the speed–pmf relation measured here demonstrates a simple ohmic current–pmf relation, also indicative of such channels. If (i) two protons are used per mechanical step of a single torque generating unit (1), (ii) each one travels through a separate channel (14), (iii) there are ˜50 such steps per revolution (rev) (primary source), and (iv) the motor spins at 380Hz at zero load (3), then the flux through each channel is ˜50H+/rev?380Hz 1.9?10^4H+/s." |
| Entered by | Uri M |
| ID | 109820 |