Value 
17
µm
Range: ±2 Table  link µm

Organism 
Generic 
Reference 
van Mameren J, Vermeulen KC, Gittes F, Schmidt CF. Leveraging single protein polymers to measure flexural rigidity. J Phys Chem B. 2009 Mar 26 113(12):383744. p. 3840 right column 3rd paragraph and p.3842 table 1PubMed ID19673071

Method 
"[Researchers] report a new approach to obtain the flexural rigidity
by means of wellcontrolled active experiments using optical
tweezers to bend the filaments locally, as schematically depicted
in Figure 1. In this way forceextension curves were measured
for taxolstabilized microtubules and rhodaminephalloidin labeled
actin filaments." 
Comments 
"The persistence length Lp is the
exponential decay constant of the thermal tangenttangent
correlation function along the chain, modeled as a homogeneous
bendable filament and depends on the flexural rigidity EI of
the filament and the temperature T as Lp=EI/kT, where k is
the Boltzmann constant." "The average value found for the flexural
rigidity of actin is EI=(7.1±0.8)×10^26nm^2 (standard
error of the mean, BNID 105504). This corresponds to a persistence length Lp
for actin of 17±2µm using Lp=EI/kBT [Howard, J. Mechanics of motor proteins and the cytoskeleton
Sinauer Associates: Sunderland, MA, 2001]." Value in range is standard
error of the mean. See BNID 106830 
Entered by 
Uri M 
ID 
105505 