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 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1038/s41467-018-06192-3
  • Primary Citation of Related Structures:  

  • 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-li ...

    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

    York Structural Biology Laboratory, Department of Chemistry, The University of York, Heslington, York, YO10 5DD, UK. marek.brzozowski@york.ac.uk.,York Structural Biology Laboratory, Department of Chemistry, The University of York, Heslington, York, YO10 5DD, UK.,Department of Drug Design and Pharmacology, University of Copenhagen, DK-2100, Copenhagen Ø, Denmark.,Florey Institute of Neuroscience & Mental Health, University of Melbourne, Parkville, VIC, 3010, Australia.,Global Research, Novo Nordisk A/S, Novo Nordisk Park 1, 2760, Maaloev, Denmark.,School of Chemistry, University of Melbourne, Parkville, VIC, 3010, Australia.,Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3, DK-2100, Copenhagen N, Denmark.,Department of Cell Signalling, de Duve Institute, B-1200, Brussels, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neural/ectodermal development factor IMP-L2
A
242Drosophila melanogasterMutation(s): 0 
Gene Names: ImpL2
Find proteins for Q09024 (Drosophila melanogaster)
Go to UniProtKB:  Q09024
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Insulin-like growth factor I
B
70Homo sapiensMutation(s): 0 
Gene Names: IGF1 (IBP1)
Find proteins for P05019 (Homo sapiens)
Go to Gene View: IGF1
Go to UniProtKB:  P05019
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.57 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.229 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 82.030α = 90.00
b = 94.150β = 95.26
c = 48.360γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
XDSdata reduction
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


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

Revision History 

  • Version 1.0: 2018-09-26
    Type: Initial release
  • Version 1.1: 2018-10-03
    Type: Data collection, Database references