Structural and functional organization of the ESCRT-I trafficking complex.
The endosomal sorting complex required for transport (ESCRT) complexes are central to receptor downregulation, lysosome biogenesis, and budding of HIV. The yeast ESCRT-I complex contains the Vps23, Vps28, and Vps37 proteins, and its assembly is directed by the C-terminal steadiness box of Vps23, the N-terminal half of Vps28, and the ... C-terminal half of Vps37. The crystal structures of a Vps23:Vps28 core subcomplex and the Vps23:Vps28:Vps37 core were solved at 2.1 and 2.8 A resolution. Each subunit contains a structurally similar pair of helices that form the core. The N-terminal domain of Vps28 has a hydrophobic binding site on its surface that is conformationally dynamic. The C-terminal domain of Vps28 binds the ESCRT-II complex. The structure shows how ESCRT-I is assembled by a compact core from which the Vps23 UEV domain, the Vps28 C domain, and other domains project to bind their partners.
Mesh Terms:
Amino Acid Motifs, Amino Acid Sequence, Endosomal Sorting Complexes Required for Transport, Models, Molecular, Molecular Sequence Data, Phenotype, Protein Conformation, Protein Interaction Mapping, Protein Transport, Recombinant Fusion Proteins, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Sequence Alignment, Vesicular Transport Proteins
Amino Acid Motifs, Amino Acid Sequence, Endosomal Sorting Complexes Required for Transport, Models, Molecular, Molecular Sequence Data, Phenotype, Protein Conformation, Protein Interaction Mapping, Protein Transport, Recombinant Fusion Proteins, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Sequence Alignment, Vesicular Transport Proteins
Cell
Date: Apr. 07, 2006
PubMed ID: 16615894
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