spacer
spacer
Type a query for QuickGO...
You can reach the search box using alt+9 (Win/IE), alt+shift+9 (Win/Firefox) or ctrl+9 (Mac)
EBIDatabasesQuickGO

GO:0005786 signal recognition particle, endoplasmic reticulum targeting

A ribonucleoprotein particle of 325 kDa composed of a 7S (300 nucleotide) RNA molecule and a complex of six different polypeptides. This binds both to the N-terminal signal peptide for proteins destined for the endoplasmic reticulum as they emerge from the large ribosomal subunit and also to the ribosome. This binding arrests further translation thereby preventing the proteins from being released into the cytosol. The SRP-ribosome complex then diffuses to the endoplasmic reticulum where it is bound to the signal recognition particle receptor, which allows resumption of protein synthesis and facilitates the passage of the growing polypeptide chain through the translocon. Through a process involving GTP hydrolysis, the SRP-SRP receptor complex dissociates and SRP returns to the cytosol. Of the six polypeptides of SRP the 54 kDa subunit (SRP54) is the central player. It contains an N-terminal GTPase domain and a C-terminal domain that binds directly to the signal peptide and the SRP RNA. Examples of this component are found in Mus musculus, Saccharomyces cerevisiae and Arabidopsis thaliana.

Term Information

ID GO:0005786
Name signal recognition particle, endoplasmic reticulum targeting
Ontology Cellular Component
Definition A ribonucleoprotein particle of 325 kDa composed of a 7S (300 nucleotide) RNA molecule and a complex of six different polypeptides. This binds both to the N-terminal signal peptide for proteins destined for the endoplasmic reticulum as they emerge from the large ribosomal subunit and also to the ribosome. This binding arrests further translation thereby preventing the proteins from being released into the cytosol. The SRP-ribosome complex then diffuses to the endoplasmic reticulum where it is bound to the signal recognition particle receptor, which allows resumption of protein synthesis and facilitates the passage of the growing polypeptide chain through the translocon. Through a process involving GTP hydrolysis, the SRP-SRP receptor complex dissociates and SRP returns to the cytosol. Of the six polypeptides of SRP the 54 kDa subunit (SRP54) is the central player. It contains an N-terminal GTPase domain and a C-terminal domain that binds directly to the signal peptide and the SRP RNA. Examples of this component are found in Mus musculus, Saccharomyces cerevisiae and Arabidopsis thaliana.
Comment

Synonyms

Type Synonym
exact SRP
exact signal sequence receptor complex

Cross-references associated with this term:

Database ID
INTERPRO IPR003210
Wikipedia Signal_recognition_particle

This term can be used instead of these obsolete terms:

GO:0008548 signal-recognition-particle GTPase activity (replaced_by GO:0005786)

Web service: term information

Use this URI template to access this data as a service:

GTerm?id=termID&format=format

Full details can be found on the QuickGO Web Services page.

Ancestor Chart

Visual display of a section of the GO directed acyclic graph (DAG) for a single GO term. Terms in the GO are linked to parent (more general) terms and often to child (more specific) terms by one or more 'relationships'

All GO terms displayed in this graph can be clicked to display term definitions and child (descendent) terms.

Chart

Ancestor Table

Alternative display of a section of the GO, providing a concise view of the relationships connecting GO terms

All GO terms displayed in this chart can be right-clicked to display term definitions and child (descendent) terms.

GO:0005575 cellular_component
GO:0005623 cell
GO:0032991 macromolecular complex
GO:0044464 cell part
GO:0005622 intracellular
GO:0044424 intracellular part
GO:0005737 cytoplasm
GO:0044444 cytoplasmic part
GO:0030529 ribonucleoprotein complex
GO:0048500 signal recognition particle
GO:0005786 signal recognition particle, endoplasmic reticulum targeting

Relationship key

Code Relationship
part of
is a
regulates
+ve regulates
-ve regulates

Child Terms

All direct descendants (child terms) available for this GO term:
Term has no children

Protein Annotation

DB
ID
Qualifier colocalizes_with contributes_to NOT NOT|colocalizes_with NOT|contributes_to
GO Term
Reference
Evidence IMP IGI IPI IGC ISS IDA IEP IEA TAS NAS ND IC RCA ISA EXP
With
Taxonomy
From
Download limit
Format

Co-occurring Terms

Co-occurrence statistics

This display shows those GO terms which have been annotated to the same proteins as this term.
Terms may have been co-annotated either by electronic (IEA) or manual annotation methods. Users can decide which evidence code type should be used in the calculation of the co-occurence statistics.
Click on the 'Update' button to run the co-occurence calculation
IMP IGI IPI IGC ISS IDA IEP IEA TAS NAS ND IC RCA ISA EXP Statistics may take up to 1 minute to calculate
spacer
14ms
Stand-alone
Hostnametomcat-7.ebi.ac.uk
Uptime16:38 12/10/2009
Data version2009-12-11-04-06-50
Terminal
spacer