Type I fimbria

M. Forero, O. Yakovenko, E.V. Sokurenko, W.E. Thomas, V. Vogel, Uncoiling mechanics of escherichia coli type I fimbriae are optimized for catch bonds. PLoS Biol. 4, 1509-1516 (2006)... 

Fig. 1 Examples of bacterial hair styles , a Thick and straight type 1 fimbriated E. coli. Type 1 fimbriae are composite structures with a relatively rigid 8 nm wide rod tipped by a thin (2.5 nm) more flexible tip fibrillum. b Thin and wavy F17 fimbriated E. coli covered with 1-3 pm long, flexible, 2-3 nm wide fimbriae, c Tangled (capsules and sheaths) Y. pest is FI capsular antigen. No individual fibres are visible, but the capsule consists of a tangle of thin ( 2 nm) flexible fibres. AFM amplitude picture (a) kindly provided by Dr R. Willaert, Ultrastructure, VU Brussels TEM picture (b) kindly provided by I. Caplier, Protein Chemistry, VU Brussels and reprinted from [23] with permission from the publisher SEM picture (c) reprinted from [24] with permission from the publisher...

In Corynebacterium, SpaA and, sometimes SpaB subunits, form the pilus shaft. The major subunits are commonly located at the base of the shaft, while SpaC subunits are present at the tip. Genomes of Actinomyces have been shown to harbor two different loci (fimQF and the/mAB) encoding for two different types of fimbriae (called type 1 and type 2). These fimbriae are constituted of the major fimbrial protein, i.e., FimA or FimP, forming the shaft and the minor fimbrial protein, i.e., FimB or EimQ, localized at the tip and the cell surface. ... 

Beatty WW, Bierley RA (1985) Scopolamine degrades working memory but spares spatial reference memory dissimilarity of cholinergic effect and restriction of distal visual cues. Pharmacol Biochem Behav 23 1-6 Cassel JC, Kelche C (1989) Scopolamine treatment and fimbria-fomix lesions mimetic effects on radial maze performance. Physiol Behav 46 347-353 Levin ED, Bettegowda C, Weaver T, Christopher NC (1998) Nicotine-dizocilpine interactions and working and reference memory performance in rats in the radial-arm maze. Pharmacol Biochem Behav 61 335-340 Magni S, Krekule I, Bures J (1979) Radial maze type as a determinant of the choice behavior of rats. J Neurosci Meth 1 343-352... 

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