Crystal structure of human FGF23

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.203 

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This is version 2.1 of the entry. See complete history


Molecular insights into the klotho-dependent, endocrine mode of action of fibroblast growth factor 19 subfamily members.

Goetz, R.Beenken, A.Ibrahimi, O.A.Kalinina, J.Olsen, S.K.Eliseenkova, A.V.Xu, C.Neubert, T.A.Zhang, F.Linhardt, R.J.Yu, X.White, K.E.Inagaki, T.Kliewer, S.A.Yamamoto, M.Kurosu, H.Ogawa, Y.Kuro-O, M.Lanske, B.Razzaque, M.S.Mohammadi, M.

(2007) Mol Cell Biol 27: 3417-3428

  • DOI: https://doi.org/10.1128/MCB.02249-06
  • Primary Citation of Related Structures:  
    2P23, 2P39

  • PubMed Abstract: 

    Unique among fibroblast growth factors (FGFs), FGF19, -21, and -23 act in an endocrine fashion to regulate energy, bile acid, glucose, lipid, phosphate, and vitamin D homeostasis. These FGFs require the presence of Klotho/betaKlotho in their target tissues. Here, we present the crystal structures of FGF19 alone and FGF23 in complex with sucrose octasulfate, a disaccharide chemically related to heparin. The conformation of the heparin-binding region between beta strands 10 and 12 in FGF19 and FGF23 diverges completely from the common conformation adopted by paracrine-acting FGFs. A cleft between this region and the beta1-beta2 loop, the other heparin-binding region, precludes direct interaction between heparin/heparan sulfate and backbone atoms of FGF19/23. This reduces the heparin-binding affinity of these ligands and confers endocrine function. Klotho/betaKlotho have evolved as a compensatory mechanism for the poor ability of heparin/heparan sulfate to promote binding of FGF19, -21, and -23 to their cognate receptors.

  • Organizational Affiliation

    Department of Pharmacology, New York University School of Medicine, New York, NY 10016, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fibroblast growth factor 23155Homo sapiensMutation(s): 0 
Gene Names: FGF23HYPF
UniProt & NIH Common Fund Data Resources
Find proteins for Q9GZV9 (Homo sapiens)
Explore Q9GZV9 
Go to UniProtKB:  Q9GZV9
GTEx:  ENSG00000118972 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9GZV9
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
Glycosylation Resources
GlyTouCan:  G97555GV
GlyCosmos:  G97555GV
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.811α = 90
b = 47.094β = 90
c = 84.931γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-10
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2023-08-30
    Changes: Data collection, Database references, Refinement description, Structure summary