pilus


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Related to pilus: piles, pili, mesosome, F pilus

pilus

 [pi´lus] (L.)
1. hair. adj., adj pi´lial.
2. one of the minute filamentous appendages of certain bacteria associated with antigenic properties and sex functions of the cell. Called also fimbria. adj., adj pi´liate.
pi´li cunicula´ti a condition characterized by burrowing hairs.
F pilus in bacterial genetics, a hollow tubular pilus possessed by (male) F+ cells, the carrier of the F plasmid (fertility plasmid). It forms a connection with a (female) F cell in bacterial conjugation to allow the transfer of genetic material.
pi´li incarna´ti a condition characterized by ingrown hairs.
pi´li tor´ti a condition characterized by twisted hairs.

pi·lus

, pl.

pi·li

(pī'lŭs, pī'lī), [TA]
1.
See also: conjugative plasmid. Synonym(s): hair (1)
2. A fine filamentous appendage, somewhat analogous in function to the flagellum, which occurs on some bacteria. Although they can be chemically similar to flagella, pili consist only of protein and are shorter, straighter, and more numerous. Specialized pili (F pili, I pili, and other conjugative pili) seem to mediate bacterial conjugation and bacterial attachment to host cells during the infective process.
See also: conjugative plasmid. Synonym(s): fimbria (2)
[L.]

pilus

(pī′ləs)
n. pl. pi·li (-lī′)
A hair or hairlike structure, especially a proteinaceous structure projecting from the surface of a bacterium that is smaller than a flagellum and functions in DNA transfer during conjugation and, usually with other such structures, in adhesion.

pi·lus

, pl. pili (pī'lŭs, -lī) [TA]
1. One of the fine, keratinized, filamentous epidermal growths arising from the skin of the body of mammals except the palms, soles, and flexor surfaces of the joints; the full length and texture of the hair varies markedly in different body sites.
2. A fine filamentous appendage, somewhat analogous to the flagellum, that occurs on some bacteria.
Synonym(s): fimbria (2) .
See also: conjugative plasmid
[L.]

pilus

a hair-like structure on the surface of bacteria which may be associated with bacterial CONJUGATION (the sex pilus) or with adhering bacteria to surfaces. See also FIMBRIA.
References in periodicals archive ?
coli to a host cell through a ligandreceptor binding may facilitate cross-talk between the bacterial cell and the host cell that in turn leads to temporal regulation of some of the fim genes involved in type 1 pilus expression.
Beck, "Osmolarity and pH growth conditions regulate fim gene transcription and type 1 pilus expression in uropathogenic Escherichia coli," Infection and Immunity, vol.
Similarly, PI-2a-specific IgG increased significantly between acute illness (GMC 15.0 RLU/mL [range 0.8-606.5; 95% CI 10-22.5]) and convalescence (GMC 28.7 RLU/mL [range 0.8-1459.9; 95% CI 19.43.2]) for the 66 patients with infection caused by GBS isolates expressing this pilus type (p<0.001) (Figure 4).
For a subset of strains, expression was undetectable for CPS (10%) or pilus (11%).
La deteccion negativa de pilus tipo 1 correspondio a la ausencia de ambos genes y fue observado en 49% de las cepas estudiadas (20/41).
La distribucion de la presencia de pilus tipo 1 de acuerdo con los serotipos de S.
The minor pilin subunit Sgp2 is necessary for assembly of the pilus encoded by the srtG cluster of Streptococcus suis.
Association of Streptococcus suis serotype 2 STs and srtF and srtG pilus clusters in isolates from North America * ST No.
Tauriga CEO Seth Shaw argued that the stock price volatility did not reflect the long-term value proposition of Pilus. Jason Barkeloo, Pilus president, said that his company also remained committed to completing the deal.
PI-2-containing isolates of all identified sequence types expressed polymers of the highly conserved pilus protein PitB on their surface.
A second pilus type in Streptococcus pneumoniae is prevalent in emerging serotypes and mediates adhesion to host cells.
Identification and characterization of the Escherichia coli type 1 pilus adhesin protein.