6FF3

Crystal structure of Drosophila neural ectodermal development factor Imp-L1 with Human IGF-I


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.57 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structures of insect Imp-L2 suggest an alternative strategy for regulating the bioavailability of insulin-like hormones.

Roed, N.K.Viola, C.M.Kristensen, O.Schluckebier, G.Norrman, M.Sajid, W.Wade, J.D.Andersen, A.S.Kristensen, C.Ganderton, T.R.Turkenburg, J.P.De Meyts, P.Brzozowski, A.M.

(2018) Nat Commun 9: 3860-3860

  • DOI: https://doi.org/10.1038/s41467-018-06192-3
  • Primary Citation of Related Structures:  
    6FEY, 6FF3

  • PubMed Abstract: 

    The insulin/insulin-like growth factor signalling axis is an evolutionary ancient and highly conserved hormonal system involved in the regulation of metabolism, growth and lifespan in animals. Human insulin is stored in the pancreas, while insulin-like growth factor-1 (IGF-1) is maintained in blood in complexes with IGF-binding proteins (IGFBP1-6). Insect insulin-like polypeptide binding proteins (IBPs) have been considered as IGFBP-like structural and functional homologues. Here, we report structures of the Drosophila IBP Imp-L2 in its free form and bound to Drosophila insulin-like peptide 5 and human IGF-1. Imp-L2 contains two immunoglobulin-like fold domains and its architecture is unrelated to human IGFBPs, suggesting a distinct strategy for bioavailability regulation of insulin-like hormones. Similar hormone binding modes may exist in other insect vectors, as the IBP sequences are highly conserved. Therefore, these findings may open research routes towards a rational interference of transmission of diseases such as malaria, dengue and yellow fevers.


  • Organizational Affiliation

    Global Research, Novo Nordisk A/S, Novo Nordisk Park 1, 2760, Maaloev, Denmark.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Neural/ectodermal development factor IMP-L2242Drosophila melanogasterMutation(s): 0 
Gene Names: ImpL2CG15009
UniProt
Find proteins for Q09024 (Drosophila melanogaster)
Explore Q09024 
Go to UniProtKB:  Q09024
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ09024
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Insulin-like growth factor I70Homo sapiensMutation(s): 0 
Gene Names: IGF1IBP1
UniProt & NIH Common Fund Data Resources
Find proteins for P05019 (Homo sapiens)
Explore P05019 
Go to UniProtKB:  P05019
PHAROS:  P05019
GTEx:  ENSG00000017427 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05019
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.57 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.03α = 90
b = 94.15β = 95.26
c = 48.36γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United Kingdom--

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-26
    Type: Initial release
  • Version 1.1: 2018-10-03
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description