Clustering of connexin 43-enhanced green fluorescent protein gap junction channels and functional coupling in living cells

Feliksas F. Bukauskas, Karen Jordan, Angele Bukauskiene, Michael V.L. Bennett, Paul D. Lampe, Dale W. Laird, Vytas K. Verselis

Research output: Contribution to journalArticle

227 Scopus citations

Abstract

Communication-incompetent cell lines were transfected with connexin (Cx) 43 fused with enhanced green fluorescent protein (EGFP) to examine the relation between Cx distribution determined by fluorescence microscopy and electrical coupling measured at single-channel resolution in living cell pairs. Cx43-EGFP channel properties were like those of wild-type Cx43 except for reduced sensitivity to transjunctional voltage. Cx43-EGFP clustered into plaques at locations of cell-cell contact. Coupling was always absent in the absence of plaques and even in the presence of small plaques. Plaques exceeding several hundred channels always conferred coupling, but only a small fraction of channels were functional. These data indicate that clustering may be a requirement for opening of gap junction channels.

Original languageEnglish (US)
Pages (from-to)2556-2561
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume97
Issue number6
DOIs
StatePublished - Mar 14 2000

ASJC Scopus subject areas

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