5LIH

Structure of a peptide-substrate bound to PKCiota core kinase domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.1 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, B
349Homo 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
PKC Epsilon pseudo substrate sequence
F, G
16Homo sapiensMutation(s): 0 
Gene Names: PRKCE (PKCE)
EC: 2.7.11.13
Find proteins for Q02156 (Homo sapiens)
Go to Gene View: PRKCE
Go to UniProtKB:  Q02156
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, B
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
SCN
Query on SCN

Download SDF File 
Download CCD File 
A, B
THIOCYANATE ION
C N S
ZMZDMBWJUHKJPS-UHFFFAOYSA-M
 Ligand Interaction
ADP
Query on ADP

Download SDF File 
Download CCD File 
A, B
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
AF3
Query on AF3

Download SDF File 
Download CCD File 
A, B
ALUMINUM FLUORIDE
Al F3
KLZUFWVZNOTSEM-UHFFFAOYSA-K
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
A, B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.980α = 90.00
b = 84.230β = 90.00
c = 111.830γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
xia2data reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-14
    Type: Initial release
  • Version 1.1: 2018-10-17
    Type: Data collection, Source and taxonomy, Structure summary