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Molecular chaperone which facilitates proper subunit assembly and surface trafficking of alpha-7 (CHRNA7) and alpha-8 (CHRNA8) nicotinic acetylcholine receptors. May also promote functional expression of homomeric serotoninergic 5-HT3 receptors, and of heteromeric acetylcholine receptors alpha-3/beta-2, alpha-3/beta-4, alpha-4/beta-2 and alpha-4/beta-4.
Gene References into Functions
Two RIC3 gene haplotypes of four variants: A-G-C-G, and C-A-C-A might relate to either protection against or increased susceptibility to PD in the Han Chinese population, respectively. PMID: 28606768
RIC3 mutations are not a common cause of PD in the French-Canadian and French populations. PMID: 28153381
RIC3 is a known chaperone of neuronal nicotinic acetylcholine receptor subunit alpha-7 (CHRNA7). PMID: 27055476
5-HT3A-ICD is not only required but also sufficient for interaction with RIC-3 PMID: 27045630
expression of chaperones such as Ric-3 can influence proteins associating with alpha7-nAChRs PMID: 26258666
RIC-3 differentially regulates assembly and expression of different nicotinic receptor subunits. These results also show that nicotine-mediated upregulation of alpha4beta2 receptors can be dynamically regulated by the presence of the chaperone, RIC-3. PMID: 23586521
RIC-3 gene rs1528133 variation was not found to be effective over any analyzed obesity related parameter, but associated with higher glycemic load, protein and fat eating behavior and antihypertensive drug use PMID: 23153976
Xenopus laevis RIC-3 is more effective than either the homomeric human or C. elegans protein in chaperoning the expression of nematode nicotinic receptor ACR-16 in Xenopus oocytes. PMID: 22970690
RIC-3 exclusively enhances the surface expression of human homomeric 5-hydroxytryptamine type 3A (5-HT3A) receptors despite direct interactions with 5-HT3A, -C, -D, and -E subunits. PMID: 20522555
the hric3 locus encodes for multiple transcripts, is likely to produce multiple hric3 isoforms, and hric3 is expressed in neurons and muscles, thus enabling its interactions with nicotinic acetylcholine receptors in vivo PMID: 12821669
ric-3 appears to be necessary for proper folding and/or assembly of alpha7 receptors in HEK293 cells PMID: 15504725
RIC-3 may play a role in 5-HT(3A) receptor folding, assembly, or transport to the cell surface PMID: 15809299
hRIC-3 can act as a specific regulator of alpha7 and 5-HT3 expression at different levels by increasing the number of mature receptors and facilitating its transport to the membrane PMID: 15927954
Mutations in the ric-3 gene affect maturation of nicotinic acetylcholine receptors. PMID: 17192664
both isoforms of RIC-3 play a role in determining 5-HT3 receptor composition. PMID: 17609200
Immunohistochemistry demonstrated the presence of RIC-3 in rat brain localized, in general, in places where alpha7 nAChRs were found. PMID: 18179477
When expressed in a human cell line, human RIC-3 enhances neuronal nicotinic acetylcholine receptor maturation more efficiently than Drosophila melanogaster RIC-3. PMID: 18208544
this review provides a brief history of RIC-3--REVIEW PMID: 18246096
we describe the generation and functional and pharmacological characterization of a Chinese hamster ovary (CHO)-K1 cell line co-expressing the human alpha7 nAChR and RIC-3 PMID: 18471073
The RIC-3e protein is functionally active and enables surface expression of mature alpha7-nAChRs in cell lines not otherwise permissive for the expression of this receptor. PMID: 18691158
Broadly expressed, with high levels in muscle, brain, heart, pancreas and testis. In the central nervous system, highest levels are detected in the cerebellum and pituitary gland. Over-expressed in brains from patients with bipolar disease or schizophreni