6BQ1

Human PI4KIIIa lipid kinase complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Architecture of the human PI4KIII alpha lipid kinase complex.

Lees, J.A.Zhang, Y.Oh, M.S.Schauder, C.M.Yu, X.Baskin, J.M.Dobbs, K.Notarangelo, L.D.De Camilli, P.Walz, T.Reinisch, K.M.

(2017) Proc. Natl. Acad. Sci. U.S.A. 114: 13720-13725

  • DOI: 10.1073/pnas.1718471115

  • PubMed Abstract: 
  • Plasma membrane (PM) phosphoinositides play essential roles in cell physiology, serving as both markers of membrane identity and signaling molecules central to the cell's interaction with its environment. The first step in PM phosphoinositide synthes ...

    Plasma membrane (PM) phosphoinositides play essential roles in cell physiology, serving as both markers of membrane identity and signaling molecules central to the cell's interaction with its environment. The first step in PM phosphoinositide synthesis is the conversion of phosphatidylinositol (PI) to PI4P, the precursor of PI(4,5)P2 and PI(3,4,5)P3 This conversion is catalyzed by the PI4KIIIα complex, comprising a lipid kinase, PI4KIIIα, and two regulatory subunits, TTC7 and FAM126. We here report the structure of this complex at 3.6-Å resolution, determined by cryo-electron microscopy. The proteins form an obligate ∼700-kDa superassembly with a broad surface suitable for membrane interaction, toward which the kinase active sites are oriented. The structural complexity of the assembly highlights PI4P synthesis as a major regulatory junction in PM phosphoinositide homeostasis. Our studies provide a framework for further exploring the mechanisms underlying PM phosphoinositide regulation.


    Organizational Affiliation

    Department of Cell Biology, Yale University School of Medicine, New Haven, CT 06520.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol 4-kinase III alpha (PI4KA)
A
1647Homo sapiensMutation(s): 0 
Gene Names: PI4KA (PIK4, PIK4CA)
EC: 2.7.1.67
Find proteins for P42356 (Homo sapiens)
Go to Gene View: PI4KA
Go to UniProtKB:  P42356
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tetratricopeptide repeat protein 7B
B, F
863Homo sapiensMutation(s): 0 
Gene Names: TTC7B (TTC7L1)
Find proteins for Q86TV6 (Homo sapiens)
Go to Gene View: TTC7B
Go to UniProtKB:  Q86TV6
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Protein FAM126A
C, G
292Homo sapiensMutation(s): 0 
Gene Names: FAM126A (DRCTNNB1A)
Find proteins for Q9BYI3 (Homo sapiens)
Go to Gene View: FAM126A
Go to UniProtKB:  Q9BYI3
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol 4-kinase III alpha (PI4KA)
E
1648Homo sapiensMutation(s): 0 
Gene Names: PI4KA (PIK4, PIK4CA)
EC: 2.7.1.67
Find proteins for P42356 (Homo sapiens)
Go to Gene View: PI4KA
Go to UniProtKB:  P42356
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
E4S
Query on E4S

Download SDF File 
Download CCD File 
A, E
5-{2-amino-1-[4-(morpholin-4-yl)phenyl]-1H-benzimidazol-6-yl}-N-(2-fluorophenyl)-2-methoxypyridine-3-sulfonamide
C29 H27 F N6 O4 S
AJOGHKUZDLYXKS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
A, E
L-PEPTIDE LINKINGC4 H9 N O2

--

Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM114068

Revision History 

  • Version 1.0: 2017-12-13
    Type: Initial release
  • Version 1.1: 2017-12-27
    Type: Database references
  • Version 1.2: 2018-01-03
    Type: Database references
  • Version 1.3: 2018-01-17
    Type: Author supporting evidence