2KCJ image
Deposition Date 2008-12-22
Release Date 2009-12-22
Last Version Date 2024-05-22
Entry Detail
PDB ID:
2KCJ
Title:
solution structure of FAPP1 PH domain
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Pleckstrin homology domain-containing family A member 3
Gene (Uniprot):PLEKHA3
Mutations:C94S
Chain IDs:A
Chain Length:108
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structural basis of wedging the Golgi membrane by FAPP pleckstrin homology domains.
Embo Rep. 11 279 284 (2010)
PMID: 20300118 DOI: 10.1038/embor.2010.28

Abstact

The mechanisms underlying Golgi targeting and vesiculation are unknown, although the responsible phosphatidylinositol 4-phosphate (PtdIns(4)P) ligand and four-phosphate-adaptor protein (FAPP) modules have been defined. The micelle-bound structure of the FAPP1 pleckstrin homology domain reveals how its prominent wedge independently tubulates Golgi membranes by leaflet penetration. Mutations compromising the exposed hydrophobicity of full-length FAPP2 abolish lipid monolayer binding and compression. The trafficking process begins with an electrostatic approach, phosphoinositide sampling and perpendicular penetration. Extensive protein contacts with PtdIns(4)P and neighbouring phospholipids reshape the bilayer and initiate tubulation through a conserved wedge with features shared by diverse protein modules.

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Primary Citation of related structures