NADH-bound AIF activates the mitochondrial CHCHD4/MIA40 chaperone by a substrate-mimicry mechanism.

Brosey CA, Shen R, Tainer JA, EMBO J (2025) Europe PMC

SASDV47 – Peptide-linked fusion protein of Apoptosis-inducing factor 1 AIF(104-613) point mutant W196A and the N-terminal segment of Mitochondrial intermembrane space import and assembly protein 40 CHCHD4(1-45)

Mitochondrial intermembrane space import and assembly protein 40
Apoptosis-inducing factor 1, mitochondrial
MWexperimental 110 kDa
MWexpected 124 kDa
VPorod 289 nm3
log I(s) 1.98×102 1.98×101 1.98×100 1.98×10-1
Mitochondrial intermembrane space import and assembly protein 40 Apoptosis-inducing factor 1, mitochondrial small angle scattering data  s, nm-1
ln I(s)
Mitochondrial intermembrane space import and assembly protein 40 Apoptosis-inducing factor 1, mitochondrial Guinier plot ln 1.98×102 Rg: 3.9 nm 0 (3.9 nm)-2 s2
(sRg)2I(s)/I(0)
Mitochondrial intermembrane space import and assembly protein 40 Apoptosis-inducing factor 1, mitochondrial Kratky plot 1.104 0 3 sRg
p(r)
Mitochondrial intermembrane space import and assembly protein 40 Apoptosis-inducing factor 1, mitochondrial pair distance distribution function Rg: 3.9 nm 0 Dmax: 12.9 nm

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of Peptide-linked fusion protein of Apoptosis-inducing factor 1 AIF(104-613) point mutant W196A and the N-terminal segment of Mitochondrial intermembrane space import and assembly protein 40 CHCHD4(1-45) in 25 mM HEPES, 150 mM NaCl, 2 mM TCEP, pH 7.5 were collected on the 12.3.1 (SIBYLS) beam line at the Advanced Light Source (ALS) storage ring (Berkeley, CA, USA) using a Pilatus3 X 2M detector at a sample-detector distance of 2 m and at a wavelength of λ = 1.27 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). One solute concentration of 4.90 mg/ml was measured at 10°C. 30 successive 0.500 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.

Experimental molecular weight was determined by the volume of correlation (Vc) method. The real-space PDDF I(0) should be recorded as 193, based on ScAtter P(r) calculations.

Mitochondrial intermembrane space import and assembly protein 40 (CHCHD4)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Dimer
Mon. MW   5.9 kDa
 
UniProt   Q8N4Q1 (1-45)
Sequence   FASTA
 
Apoptosis-inducing factor 1, mitochondrial (AIF)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Dimer
Mon. MW   56.3 kDa
 
UniProt   O95831 (104-613)
Sequence   FASTA