5W21

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 

wwPDB Validation   3D Report Full Report


This is version 1.5 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
  • Primary Citation of Related Structures:  
    5W21

  • 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

    Department of Biochemistry & Molecular Pharmacology, New York University School of Medicine, New York, New York 10016, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
KlothoA981Homo sapiensMutation(s): 0 
Gene Names: KL
EC: 3.2.1.31
Find proteins for Q9UEF7 (Homo sapiens)
Explore Q9UEF7 
Go to UniProtKB:  Q9UEF7
NIH Common Fund Data Resources
PHAROS  Q9UEF7
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Fibroblast growth factor 23B226Homo sapiensMutation(s): 0 
Gene Names: FGF23HYPFUNQ3027/PRO9828
Find proteins for Q9GZV9 (Homo sapiens)
Explore Q9GZV9 
Go to UniProtKB:  Q9GZV9
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PHAROS  Q9GZV9
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Fibroblast growth factor receptor 1C226Homo sapiensMutation(s): 0 
Gene Names: FGFR1BFGFRCEKFGFBRFLGFLT2HBGFR
EC: 2.7.10.1
Find proteins for P11362 (Homo sapiens)
Explore P11362 
Go to UniProtKB:  P11362
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PHAROS  P11362
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 283.301α = 90
b = 72.593β = 91.98
c = 95.329γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing
Cootmodel building

Structure Validation

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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 Research (NIH/NIDCR)United StatesDE13686

Revision History 

  • Version 1.0: 2018-01-24
    Type: Initial release
  • Version 1.1: 2018-01-31
    Changes: Database references
  • Version 1.2: 2018-02-07
    Changes: Database references
  • Version 1.3: 2018-02-14
    Changes: Author supporting evidence
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.5: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary