Skip to main content Accessibility help
×
Hostname: page-component-6766d58669-bkrcr Total loading time: 0 Render date: 2026-05-22T18:04:42.981Z Has data issue: false hasContentIssue false

3 - Genes required for RNA interference

Published online by Cambridge University Press:  31 July 2009

Nathaniel R. Dudley
Affiliation:
Biology Department, University of North Carolina
Ahmad Z. Amin
Affiliation:
Biology Department, University of North Carolina
Bob Goldstein
Affiliation:
Biology Department, University of North Carolina
Krishnarao Appasani
Affiliation:
GeneExpression Systems, Inc., Massachusetts
Andrew Fire
Affiliation:
Stanford University, California
Get access

Summary

Introduction

RNA interference (RNAi) is a recently discovered phenomenon in which double-stranded RNA (dsRNA) silences endogenous gene expression in a sequence-specific manner (Fire et al., 1998). Since its discovery, the use of RNAi has become widely employed in many organisms to specifically knock down gene function. RNAi shares a remarkable degree of similarity with silencing phenomena in other organisms (Cogoni et al., 1999a; Sharp, 1999). For instance, RNAi, post-transcriptional gene silencing in plants and cosuppression in fungi can all be activated by the presence of aberrant RNAs (Maine, 2000; Tijsterman et al., 2002a). Additionally, plant, worm, and fly cells or extracts undergoing RNA-mediated interference all contain small dsRNAs, around 25 nucleotides in length, identical to the sequences present in the silenced gene (Baulcombe, 1996; Hammond et al., 2000; Zamore et al., 2000; Catalanotto et al., 2000).

The high degree of similarity between these RNA-mediated silencing phenomena supports the notion that they were derived from an ancient and conserved pathway used to regulate gene expression, presumably to eliminate defective RNAs and to defend against viral infections and transposons (Zamore, 2002). Components of RNAi have also been implicated in developmental processes, suggesting that RNAi may play a broader role in regulating gene expression (Smardon et al., 2000; Knight et al., 2001; et al., Ketting et al., 2001).

Although we have learned much about the general mechanisms underlying RNAi, a detailed understanding of how RNAi works remains to be elucidated.

Information

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Book purchase

Temporarily unavailable

Save book to Kindle

To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×