2006
The KCNE2 Potassium Channel Ancillary Subunit Is Essential for Gastric Acid Secretion*
Roepke TK, Anantharam A, Kirchhoff P, Busque SM, Young JB, Geibel JP, Lerner DJ, Abbott GW. The KCNE2 Potassium Channel Ancillary Subunit Is Essential for Gastric Acid Secretion*. Journal Of Biological Chemistry 2006, 281: 23740-23747. PMID: 16754665, DOI: 10.1074/jbc.m604155200.Peer-Reviewed Original ResearchConceptsAncillary subunitsKCNE gene familyGastric acid secretionPotassium channel alpha subunitFirst genetic evidenceSecretory cellsProton secretionChannel alpha subunitGene familyKCNE familyParietal cell morphologyAcid secretionGenetic evidenceAlpha subunitHuman cardiac arrhythmiasParietal cellsChannel complexSubunitsCell morphologyKCNE2Normal gastrointestinal functionGenesKCNQ1Gene-dose effectCells
1998
Differential localization of colonic H+-K+-ATPase isoforms in surface and crypt cells
Rajendran V, Singh S, Geibel J, Binder H. Differential localization of colonic H+-K+-ATPase isoforms in surface and crypt cells. American Journal Of Physiology 1998, 274: g424-g429. PMID: 9486199, DOI: 10.1152/ajpgi.1998.274.2.g424.Peer-Reviewed Original ResearchConceptsCrypt cellsColonic cryptsRat distal colonSurface cellsSurface epithelial cellsATPase isoformsOuabain-insensitive componentApical membraneDistal colonAcid loadDependent intracellularEpithelial cellsATPase activityCryptsDifferential localizationOuabainATPase alpha subunitCellsAlpha subunitCompelling evidenceIsoformsColonActivityRecovery
1997
Gi regulation of secretory vesicle swelling examined by atomic force microscopy
Jena B, Schneider S, Geibel J, Webster P, Oberleithner H, Sritharan K. Gi regulation of secretory vesicle swelling examined by atomic force microscopy. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 13317-13322. PMID: 9371843, PMCID: PMC24306, DOI: 10.1073/pnas.94.24.13317.Peer-Reviewed Original ResearchConceptsSecretory vesicle membraneVesicle swellingSecretory vesiclesPlasma membraneVesicle fusionVesicle membraneSecretory vesicle swellingSecretory vesicle fusionConfocal microscopyZymogen granulesCell plasma membraneVesicle volumeHeterotrimeric guanineHeterotrimeric GTPZymogen granule sizeGTPase activityAlpha subunitMolecular mechanismsRegulatory rolePresence of GTPExocytotic processMastoparan analogsProteinGi proteinsMas7