{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T13:47:45Z","timestamp":1760622465498},"reference-count":48,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2005,2,4]],"date-time":"2005-02-04T00:00:00Z","timestamp":1107475200000},"content-version":"vor","delay-in-days":3628,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal Cellular Physiology"],"published-print":{"date-parts":[[1995,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Although it is well established that epidermal growth factor receptors (EGFRs) are asymmetrically expressed at the basolateral plasma membrane in polarized epithelial cells, how this process is regulated is not known. The purpose of this study was to address the mechanism of directed EGFR basolateral sorting using the Madin\u2010Darby canine kidney (MDCK) cell model. The first set of experiments established sorting patterns for endogenous canine EGFRs. The polarity of the canine EGFR was not quantitatively affected by differences in electrical resistance exhibited by the MDCK I and MDCK II cell strains. In both cases, greater than 90% of total surface EGFRs was localized to the basolateral surface. Canine EGFRs sort directly to the basolateral membrane from the <jats:italic>trans<\/jats:italic>\u2010Golgi network with a halftime of approximately 45 min and have an approximate t<jats:sub>1\/2<\/jats:sub> of 12.5 h once reaching the basolateral surface. Human holoreceptors expressed in stably transfected MDCK cells also localize to the basolateral membrane with similar efficiency. To identify EGFR sequences necessary for basolateral sorting, MDCK cells were transfected with cDNAs coding for cytoplasmically truncated human receptor proteins. Human EGFRs truncated at Arg\u2010651 were localized predominantly at the apical surface of filter\u2010grown cells, whereas receptors truncated at Leu\u2010723 were predominantly basolateral. These results suggest that the cytoplasmic juxtamembrane domain contains a positive basolateral sorting determinant. Moreover, the EGFR ectodomain or transmembrane domain may possess a cryptic sequence that specifically interacts with the apical sorting machinery once the dominant basolateral sorting signal is removed. Further elucidation of the precise loacation of these signals will enhance our basic understanding of regulated plasma membrane sorting, as well as the functional consequences of inappropriate EGFR expression associated with certain pathophysiologic and malignant states. \u00a9 1995 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/jcp.1041620316","type":"journal-article","created":{"date-parts":[[2005,2,26]],"date-time":"2005-02-26T04:11:29Z","timestamp":1109391089000},"page":"434-446","source":"Crossref","is-referenced-by-count":49,"title":["Cytoplasmic juxtamembrane domain of the human EGF receptor is required for basolateral localization in MDCK cells"],"prefix":"10.1002","volume":"162","author":[{"given":"Michael","family":"Hobert","sequence":"first","affiliation":[]},{"given":"Cathleen","family":"Carlin","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2005,2,4]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0968-0004(88)90147-8"},{"key":"e_1_2_1_3_1","first-page":"8560","article-title":"Transcytosis of epidermal growth factor","volume":"266","author":"Brandli A. 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