Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.84 kDa 
• Atom Count: 1261 
• Residue Count: 142 
• Unique protein chains: 1

2P39

Crystal structure of human FGF23

• DOI: 10.2210/pdb2P39/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-03-08 Released: 2007-04-10 
• Deposition Author(s): Mohammadi, M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.214 
• R-Value Work: 0.203 

Literature

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

• PubMed: 17339340 
• DOI: 10.1128/MCB.02249-06
• Primary Citation of Related Structures:  
  2P39, 2P23


• 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.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fibroblast growth factor 23	A	155	Homo sapiens	Mutation(s): 0  Gene Names: FGF23, HYPF, UNQ3027/PRO9828
Find proteins for Q9GZV9 (Homo sapiens) Explore Q9GZV9  Go to UniProtKB:  Q9GZV9
NIH Common Fund Data Resources
PHAROS  Q9GZV9 GTEx  ENSG00000118972

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram
1,3,4,6-tetra-O-sulfo-beta-D-fructofuranose-(2-1)-2,3,4,6-tetra-O-sulfonato-alpha-D-glucopyranose	B	2

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 38.811	α = 90
b = 47.094	β = 90
c = 84.931	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-03-08 
• Released Date: 2007-04-10 
Deposition Author(s): Mohammadi, M.

Revision History 

• 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