InnateDB: Systems Biology of the Innate Immune Response

Mus musculus Protein: Casc3

Summary

InnateDB Protein

IDBP-625129.2

Last Modified

2014-10-13 [Report errors or provide feedback]

Gene Symbol

Casc3

Protein Name

cancer susceptibility candidate 3

Synonyms

Species

Mus musculus

Ensembl Protein

ENSMUSP00000130926

InnateDB Gene

IDBG-266574 (Casc3)

Protein Structure

UniProt Annotation

Function

Core component of the splicing-dependent multiprotein exon junction complex (EJC) deposited at splice junctions on mRNAs. The EJC is a dynamic structure consisting of core proteins and several peripheral nuclear and cytoplasmic associated factors that join the complex only transiently either during EJC assembly or during subsequent mRNA metabolism. The EJC marks the position of the exon-exon junction in the mature mRNA for the gene expression machinery and the core components remain bound to spliced mRNAs throughout all stages of mRNA metabolism thereby influencing downstream processes including nuclear mRNA export, subcellular mRNA localization, translation efficiency and nonsense-mediated mRNA decay (NMD). Stimulates the ATPase and RNA- helicase activities of EIF4A3. Plays a role in the stress response by participating in cytoplasmic stress granules assembly and by favoring cell recovery following stress. Component of the dendritic ribonucleoprotein particles (RNPs) in hippocampal neurons. May play a role in mRNA transport. Binds spliced mRNA in sequence-independent manner, 20-24 nucleotides upstream of mRNA exon-exon junctions. Binds poly(G) and poly(U) RNA homopolymer (By similarity). {ECO:0000250}.

Subcellular Localization

Cytoplasm, perinuclear region {ECO:0000269PubMed:12843282}. Nucleus {ECO:0000269PubMed:12843282}. Nucleus speckle {ECO:0000250}. Note=Travels to the cytoplasm as part of the exon junction complex (EJC) bound to mRNA. Shuttles between the cytoplasm and the stress granules. More specifically found in nuclear intrachromatin granules clusters (IGC), also called nuclear speckles, which are storage compartments for nuclear proteins involved in mRNA processing. Colocalizes in nuclear speckles with MAGOH. Under stress condition, colocalizes with FMR1 and TIA1, but not MAGOH and RBM8A EJC core factors, in cytoplasmic stress granules, which contain stored mRNAs whose translation is stopped in response to stress (By similarity). Predominantly found in the perinuclear region. Shuttles between the nucleus and the cytoplasm in a CRM1- dependent manner. {ECO:0000250}.

Disease Associations

Tissue Specificity

High levels in heart, brain, including hippocampus and cerebellum, liver, kidney and testis; lower levels in muscle, lung and spleen. {ECO:0000269PubMed:12843282}.

Comments

Interactions

Number of Interactions

This gene and/or its encoded proteins are associated with 2 experimentally validated interaction(s) in this database.
They are also associated with 13 interaction(s) predicted by orthology.

Experimentally validated
Total	2 [view]
Protein-Protein	2 [view]
Protein-DNA	0
Protein-RNA	0
DNA-DNA	0
RNA-RNA	0
DNA-RNA	0

Predicted by orthology
Total	13 [view]

Gene Ontology

Molecular Function

Accession	GO Term
GO:0003723	RNA binding
GO:0005515	protein binding
GO:0031625	ubiquitin protein ligase binding
GO:0042802	identical protein binding

Biological Process

GO:0000184	nuclear-transcribed mRNA catabolic process, nonsense-mediated decay
GO:0006397	mRNA processing
GO:0006417	regulation of translation
GO:0006950	response to stress
GO:0008298	intracellular mRNA localization
GO:0008380	RNA splicing
GO:0051028	mRNA transport

Cellular Component

GO:0005634	nucleus
GO:0005737	cytoplasm
GO:0016607	nuclear speck
GO:0030529	ribonucleoprotein complex
GO:0035145	exon-exon junction complex
GO:0048471	perinuclear region of cytoplasm