RGD Reference Report - Evidence for Na+/Ca2+ exchanger 1 association with caveolin-1 and -2 in C6 glioma cells. - Rat Genome Database

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Evidence for Na+/Ca2+ exchanger 1 association with caveolin-1 and -2 in C6 glioma cells.

Authors: Cha, SH  Shin, SY  Jung, SY  Kim, YT  Park, YJ  Kwak, JO  Kim, HW  Suh, CK 
Citation: Cha SH, etal., IUBMB Life. 2004 Oct;56(10):621-7.
RGD ID: 1582170
Pubmed: PMID:15814461   (View Abstract at PubMed)
DOI: DOI:10.1080/15216540400020353   (Journal Full-text)

The purpose of this study is to understand the interaction of Na + -Ca2+ exchanger (NCX1), that is one of the essential regulators of Ca2+ homeostasis, with caveolin (Cav)-1 and Cav-2 in Cav-3 null cell (rat C6 glioma cell). Both mRNA and protein expression of NCX1, Cav-1 and Cav-2 was observed, but no expression of mRNA and protein of Cav-3 were observed in C6 glioma cells. In isolated caveolae-enriched membrane fraction, the NCX1, Cav-1 and Cav-2 proteins localized in same fractions. The experiment of immuno-precipitation showed complex formation between the NCX1 and Cavs. Confocal microscopy also supported co-localization of NCX1and Cavs at the plasma membrane. Functionally, sodium-free induced forward mode of NCX1 attenuated by Cav-1 antisense ODN. When treated cells with Cav-2 antisense ODN, both reverse and forward mode of NCX1 was attenuated. From these results, in the Cav-3 lacking cells, the function of NCX1 might be regulated by binding with Cavs. Considering the decrement of NCX1 activity by antisense ODNs, caveolins may play an important role in diverse of pathophysiological process of NCX1-related disorders in the body.

Gene Ontology Annotations    Click to see Annotation Detail View

Molecular Function
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
protein binding  IPISlc8a1 (Rattus norvegicus)1582170 RGD 
protein binding  IPICav1 (Rattus norvegicus)1582170 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Cav1  (caveolin 1)
Slc8a1  (solute carrier family 8 member A1)


Additional Information