Regulon

Definition

A regulon is a collection of genes or operons controlled by a common regulatory protein. These genes are usually spread out across the chromosome but respond to the same regulatory signals.

5 Must Know Facts For Your Next Test

1. Regulons can span multiple operons and are controlled by a single type of regulator protein.
2. They allow coordinated regulation of gene expression in response to specific environmental conditions.
3. Regulons are essential for processes such as stress responses, virulence, and metabolism in bacteria.
4. The ara regulon in E. coli is an example that controls the metabolism of arabinose sugar.
5. Transcription factors or sigma factors typically regulate regulons by binding to promoter regions.

Related terms

Operon:

A cluster of genes under control of a single promoter, transcribed as a single mRNA.

Promoter:

A DNA sequence where RNA polymerase binds to initiate transcription.

Sigma Factor: A protein needed for the initiation phase of bacterial transcription, directing RNA polymerase to specific promoters.