Editing Dicer

'''Dicer''' is a type of [[enzyme]] that plays a crucial role in the [[RNA interference]] pathway, where it cleaves long double-stranded [[RNA]] molecules into short double-stranded fragments of approximately 20-25 base pairs. Dicer facilitates the production of [[small interfering RNA]] (siRNA) and [[microRNA]] (miRNA), which are involved in [[gene silencing]] and post-transcriptional regulation of [[gene expression]].

== Function ==

Dicer is a part of the [[ribonuclease]] III family of enzymes. It recognizes and binds to double-stranded RNA (dsRNA) and cleaves it into short double-stranded fragments. These fragments, known as siRNA and miRNA, are then incorporated into the [[RNA-induced silencing complex]] (RISC), which targets and degrades complementary RNA molecules, thereby preventing their translation into protein.

== Structure ==

Dicer contains several functional domains, including a helicase domain, a PAZ domain, two RNase III domains, and a dsRNA-binding domain. The helicase domain is involved in unwinding the dsRNA, the PAZ domain binds to the end of the dsRNA, and the RNase III domains cleave the dsRNA at specific sites.

== Role in Disease ==

Alterations in the function of Dicer have been implicated in various diseases. For example, mutations in Dicer have been associated with [[cancer]], [[autoimmune diseases]], and [[neurodegenerative diseases]]. In cancer, reduced expression of Dicer has been linked to poor prognosis.

== See Also ==

* [[RNA interference]]
* [[MicroRNA]]
* [[Small interfering RNA]]
* [[Gene silencing]]
* [[Gene expression]]

== References ==

<references />

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[[Category:Enzymes]]
[[Category:RNA]]
[[Category:Gene expression]]
[[Category:Gene silencing]]
[[Category:RNA interference]]
<gallery>
File:2ffl-by-domain.png|Dicer domain structure
File:RNAi-simplified.png|Simplified RNA interference pathway
File:MiRNA-biogenesis.jpg|MicroRNA biogenesis
</gallery>