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

Roed NK, Viola CM, Kristensen O, Schluckebier G, Norrman M, Sajid W, Wade JD, Andersen AS, Kristensen C, Ganderton TR, Turkenburg JP, De Meyts P, Brzozowski AM, Nat Commun 9(1):3860 (2018) Europe PMC

SASDDT8 – Neural/ectodermal development factor IMP-L2 in complex with insulin-like peptide 5 (DILP5)

Insulin-like peptide 5
Neural/ectodermal development factor IMP-L2
MWI(0) 30 kDa
MWexpected 35 kDa
VPorod 55 nm3
log I(s) 4.47×101 4.47×100 4.47×10-1 4.47×10-2
Insulin-like peptide 5 Neural/ectodermal development factor IMP-L2 small angle scattering data  s, nm-1
ln I(s)
Insulin-like peptide 5 Neural/ectodermal development factor IMP-L2 Guinier plot ln 4.48×101 Rg: 2.6 nm 0 (2.6 nm)-2 s2
(sRg)2I(s)/I(0)
Insulin-like peptide 5 Neural/ectodermal development factor IMP-L2 Kratky plot 1.104 0 3 sRg
Dmax: 9 nm

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of neural/ectodermal development factor IMP-L2 in complex with insulin-like peptide 5 (DILP5) in phosphate buffered saline, pH 7.4 were collected on the ID14-3 beam line at the ESRF storage ring (Grenoble, France) using a Pilatus 1M detector at a sample-detector distance of 2.4 m and at a wavelength of λ = 0.093 nm (l(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). Solute concentrations ranging between 2.3 and 9.3 mg/ml were measured at 25°C. 10 successive 10 second frames were collected. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted. The low angle data collected at lower concentration were merged with the highest concentration high angle data to yield the final composite scattering curve.

Insulin-like peptide 5
Mol. type   Protein
Organism   Drosophila melanogaster
Olig. state   Monomer
Mon. MW   5.4 kDa
 
UniProt   E7BBS4
Sequence   FASTA
 
Neural/ectodermal development factor IMP-L2 (Imp-L2 IBP)
Mol. type   Protein
Organism   Drosophila melanogaster
Olig. state   Monomer
Mon. MW   29.9 kDa
 
UniProt   Q09024
Sequence   FASTA