Editing Pilus (section)

===Curli===
[[File:Fimbriae Adhesion to a Host Cell.jpg|thumb|This figure depicts fimbriae adhesion. In this process the fimbriae of a bacterial cell (right) adhere to specific proteins, called receptors, found on the outer membrane of a host cell (left). They do this by a specific interaction between the receptors of the host cell and the perfectly matched adhesions found on the bacteria's fimbriae. This process of bacteria adhering to a host cell can result in the colonization of that host cell as more and more bacteria collect around it, and is integral to the continued survival of the bacteria, enabling them to infect tissues and entire organs.
<ref>{{Cite web|url=http://www.textbookofbacteriology.net/colonization.html|title=Colonization and Invasion by Bacterial Pathogens|last=WI|first=Kenneth Todar, Madison|website=www.textbookofbacteriology.net|access-date=2016-12-03}}</ref>
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"Gram-negative bacteria assemble [[amyloid#Non-disease and functional amyloids|functional amyloid]] surface fibers called [[curli]]."<ref name="pmid_19011034">{{Citation |last1=Epstein |first1=EA |last2=Reizian |first2=MA |last3=Chapman |first3=MR |year=2009 |title=Spatial clustering of the curlin secretion lipoprotein requires curli fiber assembly. |journal=J Bacteriol |volume=191 |issue=2 |pages=608–615 |pmid=19011034 |pmc=2620823 |doi=10.1128/JB.01244-08 |postscript=.}}</ref> Curli are a type of fimbriae.<ref name="pmid_12398210">{{Citation |last1=Cookson |first1=AL |last2=Cooley |first2=WA |last3=Woodward |first3=MJ |year=2002 |title=The role of type 1 and curli fimbriae of Shiga toxin-producing Escherichia coli in adherence to abiotic surfaces |journal=Int J Med Microbiol |volume=292 |issue=3–4 |pages=195–205 |pmid=12398210 |doi= 10.1078/1438-4221-00203|postscript=.}}</ref> Curli are composed of proteins called curlins.<ref name="pmid_19011034"/> Some of the genes involved are ''CsgA'', ''CsgB'', ''CsgC'', ''CsgD'', ''CsgE'', ''CsgF'', and ''CsgG''.<ref name="pmid_19011034"/>