Extracellular Interaction between hCD98 and the PDZ Class II Domain of hCASK in Intestinal Epithelia

Extracellular Interaction between hCD98 and the PDZ Class II Domain of hCASK in Intestinal Epithelia The extracellular domain of the glycoprotein-associated integrin hCD98 protrudes into the basolateral extracellular space of the intestine and contains a PDZ class II-binding domain (GLLLRFPYAA, amino acids 520–529). Protein-protein interaction studies in vitro as well as in human colonic sections and Caco2-BBE cells have revealed that hCD98 coimmunoprecipitated with the basolateral membrane-associated guanylate kinase hCASK and that this interaction occurred in a PDZ domain-dependent manner. These novel results, which provide the first evidence for a PDZ domain-dependent interaction between a membrane protein and an extracellular protein, open a new field of investigation related to extracellular signaling in cell biology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Membrane Biology Springer Journals

Extracellular Interaction between hCD98 and the PDZ Class II Domain of hCASK in Intestinal Epithelia

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Publisher
Springer-Verlag
Copyright
Copyright © 2007 by Springer Science+Business Media, LLC
Subject
Life Sciences; Human Physiology ; Biochemistry, general
ISSN
0022-2631
eISSN
1432-1424
D.O.I.
10.1007/s00232-007-9001-8
Publisher site
See Article on Publisher Site

Abstract

The extracellular domain of the glycoprotein-associated integrin hCD98 protrudes into the basolateral extracellular space of the intestine and contains a PDZ class II-binding domain (GLLLRFPYAA, amino acids 520–529). Protein-protein interaction studies in vitro as well as in human colonic sections and Caco2-BBE cells have revealed that hCD98 coimmunoprecipitated with the basolateral membrane-associated guanylate kinase hCASK and that this interaction occurred in a PDZ domain-dependent manner. These novel results, which provide the first evidence for a PDZ domain-dependent interaction between a membrane protein and an extracellular protein, open a new field of investigation related to extracellular signaling in cell biology.

Journal

The Journal of Membrane BiologySpringer Journals

Published: Apr 17, 2007

References

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