5WRS

Crystal Structure of Fam20A in complex with ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of Fam20A reveals a pseudokinase featuring a unique disulfide pattern and inverted ATP-binding

Cui, J.Zhu, Q.Zhang, H.Cianfrocco, M.A.Leschziner, A.E.Dixon, J.E.Xiao, J.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.23990
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mutations in FAM20A cause tooth enamel defects known as Amelogenesis Imperfecta (AI) and renal calcification. We previously showed that Fam20A is a secretory pathway pseudokinase and allosterically activates the physiological casein kinase Fam20C to ...

    Mutations in FAM20A cause tooth enamel defects known as Amelogenesis Imperfecta (AI) and renal calcification. We previously showed that Fam20A is a secretory pathway pseudokinase and allosterically activates the physiological casein kinase Fam20C to phosphorylate secreted proteins important for biomineralization (Cui et al., 2015). Here we report the nucleotide-free and ATP-bound structures of Fam20A. Fam20A exhibits a distinct disulfide bond pattern mediated by a unique insertion region. Loss of this insertion due to abnormal mRNA splicing interferes with the structure and function of Fam20A, resulting in AI. Fam20A binds ATP in the absence of divalent cations, and strikingly, ATP is bound in an inverted orientation compared to other kinases. Fam20A forms a dimer in the crystal, and residues in the dimer interface are critical for Fam20C activation. Together, these results provide structural insights into the function of Fam20A and shed light on the mechanism by which Fam20A mutations cause disease.


    Organizational Affiliation

    Department of Pharmacology, University of California, San Diego, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pseudokinase FAM20A
A, B
438Homo sapiensMutation(s): 1 
Gene Names: FAM20A
Find proteins for Q96MK3 (Homo sapiens)
Go to Gene View: FAM20A
Go to UniProtKB:  Q96MK3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A, B
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.203 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 157.202α = 90.00
b = 157.202β = 90.00
c = 144.802γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data scaling
SCALEPACKdata scaling
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-12-03 
  • Released Date: 2017-05-03 
  • Deposition Author(s): Zhu, Q.

Revision History 

  • Version 1.0: 2017-05-03
    Type: Initial release
  • Version 1.1: 2017-05-24
    Type: Database references