The general objective is to study clathrin and its associated proteins (AP's) in order to understand their role in the formation and function of coated pits and coated vesicles. We have obtained a relatively detailed knowledge of the organization and interaction of clathrin heavy and light chains, through combined use of structural approaches and molecular cloning. We now turn to analyze the functional role of clathrin and its associated proteins in the process of vesicular membrane traffic. Several parts of the long range project are presented in this proposal. The first part is the identification, characterization and assignment of cDNA clones to the protein components of the AP-1 and AP-2 complexes. Complete sequences will be determined. In the second part we will use the sequence information to study the molecular organization and multiple forms of AP complexes at four levels: 1) Determine the domain structure of the AP polypeptide chains. 2) Analyze the molecular contacts within AP complexes, using chemical crosslinking and 2-D peptide maps. 3) Determine the subunit composition and cellular distribution of different complexes, using antibodies raised against selected synthetic peptides of the three classes of AP proteins. 4) Establish the extent and significance of the multiple species and classes of AP complexes within a cell type and between tissues. The third part of this proposal describes our long-range plans that will capitalize on our current knowledge of clathrin and on the new structural information that we expect to gain about the AP's. We will study the effects of selective modifications of clathrin and AP's on various aspects of coat formation and function. We will modify DNA sequences and transfect cells in an effort to influence aspects of coat formation and function.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
2R01GM036548-04A1
Application #
3290734
Study Section
Physiological Chemistry Study Section (PC)
Project Start
1986-04-01
Project End
1994-12-31
Budget Start
1990-01-01
Budget End
1990-12-31
Support Year
4
Fiscal Year
1990
Total Cost
Indirect Cost
Name
Harvard University
Department
Type
Schools of Medicine
DUNS #
082359691
City
Boston
State
MA
Country
United States
Zip Code
02115
Böcking, Till; Aguet, François; Rapoport, Iris et al. (2014) Key interactions for clathrin coat stability. Structure 22:819-29
Ivanovic, Tijana; Boulant, Steeve; Ehrlich, Marcelo et al. (2011) Recruitment of cellular clathrin to viral factories and disruption of clathrin-dependent trafficking. Traffic 12:1179-95
Böcking, Till; Aguet, François; Harrison, Stephen C et al. (2011) Single-molecule analysis of a molecular disassemblase reveals the mechanism of Hsc70-driven clathrin uncoating. Nat Struct Mol Biol 18:295-301
Yu, Anan; Xing, Yi; Harrison, Stephen C et al. (2010) Structural analysis of the interaction between Dishevelled2 and clathrin AP-2 adaptor, a critical step in noncanonical Wnt signaling. Structure 18:1311-20
Xing, Yi; Bocking, Till; Wolf, Matthias et al. (2010) Structure of clathrin coat with bound Hsc70 and auxilin: mechanism of Hsc70-facilitated disassembly. EMBO J 29:655-65
Guan, Rong; Dai, Han; Han, Dai et al. (2010) Structure of the PTEN-like region of auxilin, a detector of clathrin-coated vesicle budding. Structure 18:1191-8
Rapoport, Iris; Boll, Werner; Yu, Anan et al. (2008) A motif in the clathrin heavy chain required for the Hsc70/auxilin uncoating reaction. Mol Biol Cell 19:405-13
Yu, Anan; Rual, Jean-Francois; Tamai, Keiko et al. (2007) Association of Dishevelled with the clathrin AP-2 adaptor is required for Frizzled endocytosis and planar cell polarity signaling. Dev Cell 12:129-41
Ma, Yu May; Boucrot, Emmanuel; Villen, Judit et al. (2007) Targeting of AMSH to endosomes is required for epidermal growth factor receptor degradation. J Biol Chem 282:9805-12
Cheng, Yifan; Boll, Werner; Kirchhausen, Tomas et al. (2007) Cryo-electron tomography of clathrin-coated vesicles: structural implications for coat assembly. J Mol Biol 365:892-9

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