5LI1

Structure of a Par3-inhibitory peptide bound to PKCiota core kinase domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.150 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

aPKC Inhibition by Par3 CR3 Flanking Regions Controls Substrate Access and Underpins Apical-Junctional Polarization.

Soriano, E.V.Ivanova, M.E.Fletcher, G.Riou, P.Knowles, P.P.Barnouin, K.Purkiss, A.Kostelecky, B.Saiu, P.Linch, M.Elbediwy, A.Kjr, S.O'Reilly, N.Snijders, A.P.Parker, P.J.Thompson, B.J.McDonald, N.Q.

(2016) Dev.Cell 38: 384-398

  • DOI: 10.1016/j.devcel.2016.07.018
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Atypical protein kinase C (aPKC) is a key apical-basal polarity determinant and Par complex component. It is recruited by Par3/Baz (Bazooka in Drosophila) into epithelial apical domains through high-affinity interaction. Paradoxically, aPKC also phos ...

    Atypical protein kinase C (aPKC) is a key apical-basal polarity determinant and Par complex component. It is recruited by Par3/Baz (Bazooka in Drosophila) into epithelial apical domains through high-affinity interaction. Paradoxically, aPKC also phosphorylates Par3/Baz, provoking its relocalization to adherens junctions (AJs). We show that Par3 conserved region 3 (CR3) forms a tight inhibitory complex with a primed aPKC kinase domain, blocking substrate access. A CR3 motif flanking its PKC consensus site disrupts the aPKC kinase N lobe, separating P-loop/αB/αC contacts. A second CR3 motif provides a high-affinity anchor. Mutation of either motif switches CR3 to an efficient in vitro substrate by exposing its phospho-acceptor site. In vivo, mutation of either CR3 motif alters Par3/Baz localization from apical to AJs. Our results reveal how Par3/Baz CR3 can antagonize aPKC in stable apical Par complexes and suggests that modulation of CR3 inhibitory arms or opposing aPKC pockets would perturb the interaction, promoting Par3/Baz phosphorylation.


    Organizational Affiliation

    Protein Phosphorylation Laboratories, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK; Division of Cancer Studies, King's College London, London SE1 1UL, UK.,Protein Purification Facilities, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.,Structural Biology, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.,Epithelial Biology, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.,Protein Phosphorylation Laboratories, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.,Epithelial Biology, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. Electronic address: barry.thompson@crick.ac.uk.,Protein Analysis, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.,Peptide Chemistry, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.,Structural Biology, The Francis Crick Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK; Institute of Structural and Molecular Biology, School of Biological Science, Birkbeck College, Malet Street, London WC1E 7HX, UK. Electronic address: neil.mcdonald@crick.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein kinase C iota type
A
354Homo sapiensMutation(s): 0 
Gene Names: PRKCI (DXS1179E)
EC: 2.7.11.13
Find proteins for P41743 (Homo sapiens)
Go to Gene View: PRKCI
Go to UniProtKB:  P41743
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Par-3 partitioning defective 3 homolog (C. elegans)
B
20Xenopus tropicalisMutation(s): 0 
Gene Names: pard3
Find proteins for Q28E03 (Xenopus tropicalis)
Go to UniProtKB:  Q28E03
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ANP
Query on ANP

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Download CCD File 
A
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.150 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 82.030α = 90.00
b = 82.030β = 90.00
c = 90.790γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
SCALAdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-14
    Type: Initial release