protofilament

pro·to·fil·a·ment

(prō'tō-fil'ă-ment),
Basic element of a contractile flagellar microtubule, approximately 5 nm thick.
[proto- + L. filum, a thread]

protofilament

a filament formed by the aggregation of tubulin in the form of microtubules; a stage in the development of the cytoplasmic skeleton.
References in periodicals archive ?
The lateral contacts involve the interactions of 1-11S2 loop and helix H3 with the M-loop of the adjacent protofilament.
Paclitaxel being the powerful drug for treating several solid tumors including breast, ovarian and non-small cell lung carcinomas (27) prefers to bind with M-loop proximal to S loop resulting in stabilization of lateral interactions of two adjacent protofilaments (28).
1992): "Chemical crosslinking indicates a staggered and antiparallel protofilament of desmin intermediate filaments and characterizes one higher-level complex between protofilaments", en European Journal of Biochemistry 206(3): 841-852.
The protofilament building blocks of Al tangles also differ from those of AD with the diameter of the former 2.
The released energy is then stored in the microtubule wall as an elastic strain, and the [beta]--tubulin bound GDP cannot be further phosphorylated or exchanged for GTP because the successive [alpha]--tubulin in the protofilament occludes the preceding [beta]--tubulin nucleotide binding pocket (Heald and Nogales, 2002).
The conclusion is that the tubulin tails catalyze the detachment of the kinesin--ADP complex from the microtubule surface allowing the kinesin dimer to take a 'step' along the microtubule protofilament.
The growth phase is governed by the presence of a tubulin GTP cap at the end of the microtubule, and the structure we observe is tubulin protofilament sheet folded up into a blunt and straight microtubule.
The actin filament has a two-stranded helical structure, called a protofilament, which contains 7 monomers and rotates 180[degrees] per half helical pitch.
2003) Toll-like receptor 5 recognizes a conserved site on flagelhn required for protofilament formation and bacterial motility.
2007) Functional protofilament numbering of ciliary, flagellar, and centriolar microtubules.
The OP-reactive tyrosine residues reside either near the GTP binding site or within loops that interact laterally with protofilaments, indicating that this binding, if it occurs in vivo, may lead to non-cholinergic toxic outcomes (Grigoryan et al.
M loop is the main component in contacts between protofilaments, interacting with structures in the H1-S2 and H2-S3 loops of the adjacent monomer (28).