5W21

Crystal Structure of a 1:1:1 FGF23-FGFR1c-aKlotho Ternary Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

alpha-Klotho is a non-enzymatic molecular scaffold for FGF23 hormone signalling.

Chen, G.Liu, Y.Goetz, R.Fu, L.Jayaraman, S.Hu, M.C.Moe, O.W.Liang, G.Li, X.Mohammadi, M.

(2018) Nature 553: 461-466

  • DOI: 10.1038/nature25451

  • PubMed Abstract: 
  • The ageing suppressor α-klotho binds to the fibroblast growth factor receptor (FGFR). This commits FGFR to respond to FGF23, a key hormone in the regulation of mineral ion and vitamin D homeostasis. The role and mechanism of this co-receptor are unkn ...

    The ageing suppressor α-klotho binds to the fibroblast growth factor receptor (FGFR). This commits FGFR to respond to FGF23, a key hormone in the regulation of mineral ion and vitamin D homeostasis. The role and mechanism of this co-receptor are unknown. Here we present the atomic structure of a 1:1:1 ternary complex that consists of the shed extracellular domain of α-klotho, the FGFR1c ligand-binding domain, and FGF23. In this complex, α-klotho simultaneously tethers FGFR1c by its D3 domain and FGF23 by its C-terminal tail, thus implementing FGF23-FGFR1c proximity and conferring stability. Dimerization of the stabilized ternary complexes and receptor activation remain dependent on the binding of heparan sulfate, a mandatory cofactor of paracrine FGF signalling. The structure of α-klotho is incompatible with its purported glycosidase activity. Thus, shed α-klotho functions as an on-demand non-enzymatic scaffold protein that promotes FGF23 signalling.


    Organizational Affiliation

    Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.,Department of Biochemistry & Molecular Pharmacology, New York University School of Medicine, New York, New York 10016, USA.,New York Structural Biology Center, New York, New York 10027, USA.,Departments of Internal Medicine and Physiology, and Charles and Jane Pak Center of Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Klotho
A
981Homo sapiensMutation(s): 0 
Gene Names: KL
EC: 3.2.1.31
Find proteins for Q9UEF7 (Homo sapiens)
Go to Gene View: KL
Go to UniProtKB:  Q9UEF7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fibroblast growth factor 23
B
226Homo sapiensMutation(s): 0 
Gene Names: FGF23 (HYPF)
Find proteins for Q9GZV9 (Homo sapiens)
Go to Gene View: FGF23
Go to UniProtKB:  Q9GZV9
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fibroblast growth factor receptor 1
C
226Homo sapiensMutation(s): 0 
Gene Names: FGFR1 (BFGFR, CEK, FGFBR, FLG, FLT2, HBGFR)
EC: 2.7.10.1
Find proteins for P11362 (Homo sapiens)
Go to Gene View: FGFR1
Go to UniProtKB:  P11362
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.230 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 283.301α = 90.00
b = 72.593β = 91.98
c = 95.329γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2017-06-05 
  • Released Date: 2018-01-24 
  • Deposition Author(s): Mohammadi, M.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Dental and Craniofacial ResearchUnited StatesDE13686

Revision History 

  • Version 1.0: 2018-01-24
    Type: Initial release
  • Version 1.1: 2018-01-31
    Type: Database references
  • Version 1.2: 2018-02-07
    Type: Database references
  • Version 1.3: 2018-02-14
    Type: Author supporting evidence