pilus
Quick Summary
A pilus (plural: pili) is a hair-like appendage found on the surface of bacterial cells. These structures are primarily present in Gram-negative bacteria and play crucial roles in bacterial interaction and genetic exchange.123
There are different types of pili:
* Fimbriae: These are short, rigid projections that help bacteria adhere to surfaces, such as host cells.3
* Sex pili: These specialized pili are involved in bacterial conjugation, a process where genetic material is transferred directly from one bacterium to another. The sex pilus attaches the donor cell to the recipient, forming a bridge for DNA transfer.23
While not involved in motility like flagella, pili are essential for bacterial colonization and the exchange of genetic information, which can lead to bacteria acquiring new characteristics.23
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bacteriaFlagella, fimbriae, and piliMany bacteria are motile, able to swim through a liquid medium or glide or swarm across a solid surface. Swimming and swarming bacteria possess flagella, which are the extracellular appendages needed for motility. Flagella are long, helical filaments made of a single type of…
Read MoreMany bacteria are motile, able to swim through a liquid medium or glide or swarm across a solid surface. Swimming and swarming bacteria possess flagella, which are the extracellular appendages needed for motility. Flagella are long, helical filaments made of a single type of…
Read More- bacteriaExchange of genetic information
…cells produce a specific plasmid-coded pilus, called the sex pilus, which attaches the donor cell to the recipient cell. Once connected, the two cells are brought into direct contact, and a conjugal bridge forms through which the DNA is transferred from the donor to the recipient. Many conjugative plasmids can…
Read More…cells produce a specific plasmid-coded pilus, called the sex pilus, which attaches the donor cell to the recipient cell. Once connected, the two cells are brought into direct contact, and a conjugal bridge forms through which the DNA is transferred from the donor to the recipient. Many conjugative plasmids can…
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