5AWU image
Deposition Date 2015-07-08
Release Date 2016-07-06
Last Version Date 2023-11-08
Entry Detail
PDB ID:
5AWU
Keywords:
Title:
Crystal structure of the SGIP1 mu homology domain in complex with an Eps15 fragment containing two DPF motifs (YDPFKGSDPFA)
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.70 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 4 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:SH3-containing GRB2-like protein 3-interacting protein 1
Gene (Uniprot):SGIP1
Chain IDs:A
Chain Length:282
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Epidermal growth factor receptor substrate 15
Chain IDs:B
Chain Length:11
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structural basis for the recognition of two consecutive mutually interacting DPF motifs by the SGIP1 mu homology domain.
Sci Rep 6 19565 19565 (2016)
PMID: 26822536 DOI: 10.1038/srep19565

Abstact

FCHo1, FCHo2, and SGIP1 are key regulators of clathrin-mediated endocytosis. Their μ homology domains (μHDs) interact with the C-terminal region of an endocytic scaffold protein, Eps15, containing fifteen Asp-Pro-Phe (DPF) motifs. Here, we show that the high-affinity μHD-binding site in Eps15 is a region encompassing six consecutive DPF motifs, while the minimal μHD-binding unit is two consecutive DPF motifs. We present the crystal structures of the SGIP1 μHD in complex with peptides containing two DPF motifs. The peptides bind to a novel ligand-binding site of the μHD, which is distinct from those of other distantly related μHD-containing proteins. The two DPF motifs, which adopt three-dimensional structures stabilized by sequence-specific intramotif and intermotif interactions, are extensively recognized by the μHD and are both required for binding. Thus, consecutive and singly scattered DPF motifs play distinct roles in μHD binding.

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Primary Citation of related structures