Sequence Ontology

A shared vocabulary for biological sequence features and annotations

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operon

SO:0000178

Definition: The DNA region of a group of adjacent genes whose transcription is coordinated on one or several mutually overlapping transcription units transcribed in the same direction and sharing at least one gene.

Comments and references

This term is mapped to MGED. Do not obsolete without consulting MGED ontology. Definition updated with per Mejia-Almonte et.al Redefining fundamental concepts of transcription initiation in prokaryotes Aug 5 2020.

Definition references: SO:ma

Synonyms

ScopeValue
exactINSDC_feature:operon

Identifiers and subsets

Accession: SO:0000178

Persistent URL: http://purl.obolibrary.org/obo/SO_0000178

Alternate IDs: None

Subsets: SOFA

Cross references: http://en.wikipedia.org/wiki/Operon

History summary

Term history is reconstructed from the Git-era ontology files by comparing ontology classes across revisions. Earlier SVN-era changes will be added at a future date.

First seen in Git-era editable history: 2016-12-05 in commit 92e3cae

Most recent Git-era change: 2020-08-05 in commit 7d802c8

Number of changes: 3

Ontology neighborhood diagram

Ontology neighborhood for SO:0000178 Ontology neighborhood graph for SO:0000178 operon. Parent, child, and related nodes can be activated to open their term pages. SO:0005855 gene_group SO:0005855 gene_group SO:0000178 operon SO:0000178 operon SO:0002298 simple_operon SO:0002298 simple_operon SO:0002299 complex_operon SO:0002299 complex_operon
The local DAG shows nearby parent, child, and related terms. Each node links to its own term page.

Relationships

Parents

Children

Change history

This timeline summarizes changes identified in SO’s GitHub commit history, including updates to labels, definitions, parent terms, synonyms, subsets, and obsoletion status. It is a best-effort reconstruction and may not include every change to a term. Since only history from GitHub is included at the moment, any term added before the migration from SVN to Git will show as being created in 2016. This will be addressed once SVN history is incorporated.

DateChangeSummaryEvidence
2020-08-05definition changedDefinition updated
Before: A group of contiguous genes transcribed as a single (polycistronic) mRNA from a single regulatory region.
After: The DNA region of a group of adjacent genes whose transcription is coordinated on one or several mutually overlapping transcription units transcribed in the same direction and sharing at least one gene.
7d802c8
2018-01-26synonym addedSynonym added: INSDC_feature:operon
Scope: exact
5fe48bd
2016-12-05createdTerm introduced into the editable ontology history
Initial label: operon
Initial definition captured.
Initial parent: SO:0005855
92e3cae