6NFJ

Structure of Beta-Klotho in Complex with FGF19 C-terminal peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.280 
  • R-Value Observed: 0.281 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures of ligand-occupied beta-Klotho complexes reveal a molecular mechanism underlying endocrine FGF specificity and activity.

Kuzina, E.S.Ung, P.M.Mohanty, J.Tome, F.Choi, J.Pardon, E.Steyaert, J.Lax, I.Schlessinger, A.Schlessinger, J.Lee, S.

(2019) Proc Natl Acad Sci U S A 116: 7819-7824

  • DOI: https://doi.org/10.1073/pnas.1822055116
  • Primary Citation of Related Structures:  
    6NFJ

  • PubMed Abstract: 

    The three members of the endocrine fibroblast growth factor (FGF) family designated FGF19, FGF21, and FGF23 mediate their pleiotropic cellular effects by binding to and activating binary complexes composed of an FGF receptor (FGFR) bound to either α-Klotho or β-Klotho receptors. Structural analyses of ligand-occupied Klotho extracellular domains have provided important insights concerning mechanisms underlying the binding specificities of FGF21 and FGF23 to β-Klotho or α-Klotho, respectively. They have also demonstrated that Klotho proteins function as primary high-affinity receptors while FGFRs function as the catalytic subunits that mediate intracellular signaling. Here we describe the crystal structure the C-terminal tail of FGF19 (FGF19 CT ) bound to sKLB and demonstrate that FGF19 CT and FGF21 CT bind to the same binding site on sKLB, via a multiturn D-P motif to site 1 and via a S-P-S motif to the pseudoglycoside hydrolase region (site 2). Binding affinities to sKLB and cellular stimulatory activities of FGF19 CT, FGF21 CT , and a variety of chimeric mutants to cells expressing β-Klotho together with FGFR1c or FGFR4 were also analyzed. These experiments as well as detailed comparison of the structures of free and ligand-occupied sKLB to the structure of ligand-occupied sKLA reveal a general mechanism for recognition of endocrine FGFs by Klotho proteins and regulatory interactions with FGFRs that control their pleiotropic cellular responses.


  • Organizational Affiliation

    Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-klotho
A, D
960Homo sapiensMutation(s): 2 
Gene Names: KLB
UniProt & NIH Common Fund Data Resources
Find proteins for Q86Z14 (Homo sapiens)
Explore Q86Z14 
Go to UniProtKB:  Q86Z14
PHAROS:  Q86Z14
GTEx:  ENSG00000134962 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ86Z14
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nanobody 30
B, E
133Lama glamaMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Fibroblast growth factor 19
C, F
50Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O95750 (Homo sapiens)
Explore O95750 
Go to UniProtKB:  O95750
PHAROS:  O95750
GTEx:  ENSG00000162344 
Entity Groups  
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UniProt GroupO95750
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.280 
  • R-Value Observed: 0.281 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 130.09α = 90
b = 143.9β = 90.9
c = 141.05γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
XDSdata scaling
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references
  • Version 1.2: 2019-04-24
    Changes: Data collection, Database references
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Refinement description