Comparison of angiopoietin-like protein 3 and 4 reveals structural and mechanistic similarities.

Gunn KH, Gutgsell AR, Xu Y, Johnson CV, Liu J, Neher SB, J Biol Chem :100312 (2021) Europe PMC

SASDJM8 – N-terminal Angiopoietin-like protein 4 Trimer

Angiopoietin-related protein 4
MWexperimental 39 kDa
MWexpected 46 kDa
VPorod 69 nm3
log I(s) 1.82×101 1.82×100 1.82×10-1 1.82×10-2
Angiopoietin-related protein 4 small angle scattering data  s, nm-1
ln I(s)
Angiopoietin-related protein 4 Guinier plot ln 1.82×101 Rg: 4.7 nm 0 (4.7 nm)-2 s2
(sRg)2I(s)/I(0)
Angiopoietin-related protein 4 Kratky plot 1.104 0 3 sRg
p(r)
Angiopoietin-related protein 4 pair distance distribution function Rg: 4.5 nm 0 Dmax: 16 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Angiopoietin-related protein 4 DAMMIN model

Synchrotron SAXS data from solutions of angiopoietin-like protein 4 in 50 mM Tris-HCl pH 7.4, 300 mM NaCl, 100 mM betaine, 500 mM arginine, pH 7.4 were collected on the BioCAT 18ID beam line at the Advanced Photon Source (APS), Argonne National Laboratory (Lemont, IL, USA) using a Pilatus 100K detector at a sample-detector distance of 3.5 m and at a wavelength of λ = 0.103 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). In-line size-exclusion chromatography (SEC) SAS was employed. The SEC parameters were as follows: A 300.00 μl sample at 5 mg/ml was injected at a 0.80 ml/min flow rate onto a Wyatt WTC-030S5 5μm 300+, 7.8x300 mm column at 25°C. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.

Number of frames = UNKNOWN

Angiopoietin-related protein 4
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Trimer
Mon. MW   15.5 kDa
 
UniProt   Q9BY76 (26-161)
Sequence   FASTA