6UPN image
Deposition Date 2019-10-17
Release Date 2020-04-22
Last Version Date 2024-03-20
Entry Detail
PDB ID:
6UPN
Title:
Endophilin B1 helical scaffold
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
10.00 Å
Aggregation State:
HELICAL ARRAY
Reconstruction Method:
HELICAL
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Endophilin-B1
Gene (Uniprot):SH3GLB1
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U (auth: V), V (auth: W), W (auth: X), X (auth: Y), Y (auth: a), Z (auth: b), AA (auth: c), BA (auth: d), CA (auth: e), DA (auth: f), EA (auth: g), FA (auth: h), GA (auth: i), HA (auth: j), IA (auth: k), JA (auth: l), KA (auth: m), LA (auth: n), MA (auth: o), NA (auth: p), OA (auth: q), PA (auth: r), QA (auth: s), RA (auth: t), SA (auth: v), TA (auth: w), UA (auth: x), VA (auth: y)
Chain Length:365
Number of Molecules:48
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Amphipathic Motifs Regulate N-BAR Protein Endophilin B1 Auto-inhibition and Drive Membrane Remodeling.
Structure 29 61 ? (2021)
PMID: 33086035 DOI: 10.1016/j.str.2020.09.012

Abstact

Membrane remodeling is a common theme in a variety of cellular processes. Here, we investigated membrane remodeling N-BAR protein endophilin B1, a critical player in diverse intracellular trafficking events, including mitochondrial and Golgi fission, and apoptosis. We find that endophilin B1 assembles into helical scaffolds on membranes, and that both membrane binding and assembly are driven by interactions between N-terminal helix H0 and the lipid bilayer. Furthermore, we find that endophilin B1 membrane remodeling is auto-inhibited and identify direct SH3 domain-H0 interactions as the underlying mechanism. Our results indicate that lipid composition plays a role in dictating endophilin B1 activity. Taken together, this study provides insight into a poorly understood N-BAR protein family member and highlights molecular mechanisms that may be general for the regulation of membrane remodeling. Our work suggests that interplay between membrane lipids and membrane interacting proteins facilitates spatial and temporal coordination of membrane remodeling.

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