sex pili

sex pili
Fine filamentous projections (pili) on the surface of a bacterium that are important in conjugation. Often seem to be coded for by plasmids that confer conjugative potential on the host; in the case of the F-plasmid, the F-pili are 8-9nm diameter and several microns long, composed of pilin. Whether the pili merely serve to establish and maintain adhesive contact between the partners in conjugation, or whether DNA is actually transferred through the central core of the pilus is still unresolved, although a simple adhesion role is more generally accepted.

Dictionary of molecular biology. 2004.

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  • Konjugation bei Bakterien — Konjugation bezeichnet in der Cytogenetik die Übertragung von Teilen des Genoms von einer Spenderzelle auf eine Empfängerzelle. Darüber hinaus wird der Begriff in der Mykologie, der Lehre von den Pilzen, für die geschlechtliche Verschmelzung… …   Deutsch Wikipedia

  • pilin — (1) General term for the protein subunit of pilus. (2) Protein subunit (7.2 kD) of F pili, sex pili coded for by the F plasmid …   Dictionary of molecular biology

  • conjugative plasmid — A plasmid that carries the genes for sex pili and can transfer copies of itself to other bacteria during conjugation …   Dictionary of microbiology

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