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Nat Rev Mol Cell Biol. 2003 Apr;4(4):285-94.

Beyond the gap: functions of unpaired connexon channels.

Author information

1
Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA. daniel_goodenough@hms.harvard.edu

Abstract

Gap junctions consist of intercellular channels that connect the cytoplasm of adjacent cells directly and allow the exchange of small molecules. These channels are unique in that they span two plasma membranes--the more orthodox ion or ligand-gated channels span only one. Each cell contributes half of the intercellular channel, and each half is known as a connexon or hemichannel. Recent studies indicate that connexons are also active in single plasma membranes and that they might be essential in intercellular signalling beyond their incorporation into gap junctions.

PMID:
12671651
DOI:
10.1038/nrm1072
[Indexed for MEDLINE]

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