Plasmodium falciparum Kelch13 and its artemisinin-resistant mutants assemble as hexamers in solution: a SAXS data driven modeling study.

Goel N, Dhiman K, Kalidas N, Mukhopadhyay A, Ashish F, Bhattacharjee S, FEBS J (2022) Europe PMC

SASDNB5 – Truncated Kelch13-A578S mutant

Kelch protein K13 (Truncated Kelch13-A578S)
MWI(0) 356 kDa
MWexpected 396 kDa
VPorod 1700 nm3
log I(s) 3.38×104 3.38×103 3.38×102 3.38×101
Kelch protein K13 (Truncated Kelch13-A578S) small angle scattering data  s, nm-1
ln I(s)
Kelch protein K13 (Truncated Kelch13-A578S) Guinier plot ln 3.38×104 Rg: 6.1 nm 0 (6.1 nm)-2 s2
(sRg)2I(s)/I(0)
Kelch protein K13 (Truncated Kelch13-A578S) Kratky plot 1.104 0 3 sRg
p(r)
Kelch protein K13 (Truncated Kelch13-A578S) pair distance distribution function Rg: 6.7 nm 0 Dmax: 16.8 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Kelch protein K13 (Truncated Kelch13-A578S) GASBOR model

log I(s)
 s, nm-1
Kelch protein K13 (Truncated Kelch13-A578S) OTHER model

SAXS data from solutions of truncated Kelch13-A578S mutant in phosphate buffered saline, pH 7.4 were collected using an Anton Paar SAXSpace at the CSIR Institute of Microbial Technology (IMTech; Chandigarh, India) equipped with a Mythen 1K detector at a sample-detector distance of 0.3 m and at a wavelength of λ = 0.15414 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). One solute concentration of 0.66 mg/ml was measured at 10°C. One 3600 second frame was collected. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.

CAUTION: Guinier region poorly defined. CAUTION: High variance data with poorly specified errors. CAUTION: Molecular weight estimates are highly variable, in the range of 220-380 kDa.

Kelch protein K13 (Truncated Kelch13-A578S) (TrK13-A578S)
Mol. type   Protein
Organism   Plasmodium falciparum (isolate 3D7)
Olig. state   Hexamer
Mon. MW   66.1 kDa
 
UniProt   Q8IDQ2 (189-726)
Sequence   FASTA