3IDW

Crystal structure of Sla1 homology domain 2

Summary for 3IDW

• Entry DOI: 10.2210/pdb3idw/pdb
• Descriptor: Actin cytoskeleton-regulatory complex protein SLA1 (2 entities in total)
• Functional Keywords: clathrin adaptor, endocytosis, sam domain, yeast, actin-binding, cell membrane, cytoskeleton, endosome, membrane, nucleus, phosphoprotein, sh3 domain
• Biological source: Saccharomyces cerevisiae (yeast)
• Cellular location: Nucleus: P32790
• Total number of polymer chains: 1
• Total formula weight: 8590.74

Authors

Di Pietro, S.M.,Cascio, D.,Bowie, J.U.,Payne, G.S. (deposition date: 2009-07-21, release date: 2010-02-23, Last modification date: 2024-02-21)

Primary citation

Di Pietro, S.M.,Cascio, D.,Feliciano, D.,Bowie, J.U.,Payne, G.S.
Regulation of clathrin adaptor function in endocytosis: novel role for the SAM domain.
Embo J., 29:1033-1044, 2010

PubMed Abstract: During clathrin-mediated endocytosis, adaptor proteins play central roles in coordinating the assembly of clathrin coats and cargo selection. Here we characterize the binding of the yeast endocytic adaptor Sla1p to clathrin through a variant clathrin-binding motif that is negatively regulated by the Sla1p SHD2 domain. The crystal structure of SHD2 identifies the domain as a sterile alpha-motif (SAM) domain and shows a propensity to oligomerize. By co-immunoprecipitation, Sla1p binds to clathrin and self-associates in vivo. Mutations in the clathrin-binding motif that abolish clathrin binding and structure-based mutations in SHD2 that impede self-association result in endocytosis defects and altered dynamics of Sla1p assembly at the sites of endocytosis. These results define a novel mechanism for negative regulation of clathrin binding by an adaptor and suggest a role for SAM domains in clathrin-mediated endocytosis.

PubMed: 20150898
DOI: 10.1038/emboj.2010.5

Experimental method

X-RAY DIFFRACTION (1.85 Å)