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

SASDVZ6 – Mitochondrial intermembrane space import and assembly protein 40 (CHCHD4) triple mutant I12A/F14A/H20A (AIA-A)

Mitochondrial intermembrane space import and assembly protein 40
MWexperimental 16 kDa
MWexpected 16 kDa
VPorod 62 nm3
log I(s) 4.85×101 4.85×100 4.85×10-1 4.85×10-2
Mitochondrial intermembrane space import and assembly protein 40 small angle scattering data  s, nm-1
ln I(s)
Mitochondrial intermembrane space import and assembly protein 40 Guinier plot ln 4.86×101 Rg: 3.1 nm 0 (3.1 nm)-2 s2
(sRg)2I(s)/I(0)
Mitochondrial intermembrane space import and assembly protein 40 Kratky plot 1.104 0 3 sRg
p(r)
Mitochondrial intermembrane space import and assembly protein 40 pair distance distribution function Rg: 3.0 nm 0 Dmax: 10.5 nm

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of Mitochondrial intermembrane space import and assembly protein 40 (CHCHD4) triple mutant I12A/F14A/H20A (AIA-A) 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 = 0.127 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). One solute concentration of 7.30 mg/ml was measured at 10°C. 33 successive 0.300 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 determined from SEC-MALS. Molecular weight by volume of correlation (Vc) is 19.8 kDa. Real-space PDDF I(0) should be 39.2 based on ScAtter P(r) calculation.

Mitochondrial intermembrane space import and assembly protein 40 (CHCHD4)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   16.0 kDa
 
UniProt   Q8N4Q1 (1-142)
Sequence   FASTA