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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Orci, L. Schekman, R. Ravazzola, M. Meda, P. Moore, H. P. Holcomb, C. Hicke, L. |
| Description | Author Affiliation: Orci L ( Département de Morphologie, University of Geneva, Switzerland.); |
| Abstract | The yeast Sec23 protein is required in vivo and in vitro for transport of proteins from the endoplasmic reticulum (ER) to the Golgi apparatus. Ultrastructural localization of the Sec23p mammalian homologue (detected by antibody cross-reaction) in exocrine and endocrine pancreatic cells shows a specific distribution to the cytoplasmic zone between the transitional ER cisternae and Golgi apparatus where it appears associated with the tubular protuberances of the transitional ER cisternae, as well as with a population of vesicles, and surrounding cytoplasm. When ER-Golgi transport is interrupted with an energy poison, protuberances and transfer vesicles markedly decrease but Sec23p immunoreactive sites remain in the transitional cytoplasm not apparently tethered by membrane attachment. This unanticipated degree of organization suggests that cytosolic proteins, such as Sec23p, may be retained in specialized areas of the cytoplasm. A structure within the transitional zone may organize the flux of transport vesicles and Sec proteins so as to ensure efficient protein traffic in this limb of the secretory pathway. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 19 |
| Volume Number | 88 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1991-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Endoplasmic Reticulum Metabolism Fungal Proteins Islets Of Langerhans Secretion Pancreas Animals Biological Transport Cross Reactions Immunology Golgi Apparatus Immunohistochemistry Intracellular Membranes Ultrastructure Rabbits Rats, Inbred Strains Saccharomyces Cerevisiae Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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