David Domingo Sabatini

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David Sabatini

Research Professor, Department of Cell Biology;Frederick L. Ehrman Professor Emeritus of Cell Biology, Department of Cell Biology
Cell Biology

Contact Info

550 First Avenue
New York, NY 10016



1954 — University of Litoral, Rosario, Argentina, Medical Education
1961-1963 — Dr. Sabatini was a Rockefeller Foundation Fellow at Yale University Medical School and Rockefeller University, PostDoctoral Training
1966 — Dr. Sabatini received his Ph.D. degree in Cell Biology from Rockefeller University, New York, NY, Graduate Education

Research Summary

Research in this laboratory is primarily concerned with the mechanisms by which newly synthesized proteins are targeted to their sites of function in different membranes and organelles. We have had long-standing interest in the rough endoplasmic reticulum (ER) and, in particular, the translocation apparatus that in this organelle effects the insertion into the membrane and the cotranslational modification of nascent secretory, lysosomal, and membrane polypeptides. Currently, our research focuses on the sorting processes that occur in the trans region of the Golgi apparatus, and select different subsets of proteins for incorporation into vesicles that deliver them to developing secretory granules, lysosomes, or the different domains of the plasma membrane of polarized epithelial cells. For these studies, we have developed a cell-free system in which we can reproduce in vitro the generation of post Golgi vesicles from isolated Golgi fractions that contain a viral glycoprotein on its way to the cell surface. This has allowed us to undertake the identification and purification of the cytosolic and membrane proteins (including vesicle coat proteins, GTP-binding proteins, protein kinases, phospholipases, and phospholipid transport proteins) that participate in protein sorting, vesicle formation, and vesicle targeting to the acceptor membrane.

We are also studying the role of GTP-binding proteins of the rab family in the vectorial transport of proteins to the apical and basolateral plasma membrane domains of epithelial cells and in the recycling of plasma membrane receptors that follows their interiorization by endocytosis. We have identified and cloned a protein kinase that binds specifically to the GTP-bound form of rab8, a protein involved in Golgi to basolateral membrane transport, and are attempting to determine the specific biochemical role of the kinase. We have also identified and cloned a protein that binds specifically to the GTP-bound form of rab11, and have obtained evidence that rab11 and its binding protein control fusion of early endosomes and the return of receptors from recycling endosomes to the cell surface.

Research Interests

Protein Sorting in Eukaryotic Cells

The differential palmitoylation States of N-ras and h-ras determine their distinct Golgi subcompartment localizations
Lynch, Stephen J; Snitkin, Harriet; Gumper, Iwona; Philips, Mark R; Sabatini, David; Pellicer, Angel
2014-12-01; 0021-9541,Journal of cellular physiology - id: 1360222, year: 2015 Journal Article

Inhibition of ATPIF1 Ameliorates Severe Mitochondrial Respiratory Chain Dysfunction in Mammalian Cells
Chen, Walter W; Birsoy, Kivanc; Mihaylova, Maria M; Snitkin, Harriet; Stasinski, Iwona; Yucel, Burcu; Bayraktar, Erol C; Carette, Jan E; Clish, Clary B; Brummelkamp, Thijn R; Sabatini, David D; Sabatini, David M
2014-04-21; 2211-1247,Cell reports - id: 881882, year: 2014 Journal Article

Preparation of crude rough microsomes from dog pancreas
Sabatini, David D
2014-08-11; 1559-6095,Cold Spring Harbor protocols - id: 1106022, year: 2014 Journal Article

Preparation of crude rough microsomes from tissue culture cells
Sabatini, David D
2014-09-08; 1559-6095,Cold Spring Harbor protocols - id: 1173762, year: 2014 Journal Article

Preparation of rough microsomes from rat liver
Sabatini, David D
2014-08-11; 1559-6095,Cold Spring Harbor protocols - id: 1106012, year: 2014 Journal Article