Structural features of a minimal intact methyltransferase of a type I restriction-modification system.

Seo PW, Hofmann A, Kim JH, Hwangbo SA, Kim JH, Kim JW, Huynh TYL, Choy HE, Kim SJ, Lee J, Lee JO, Jin KS, Park SY, Kim JS, Int J Biol Macromol (2022) Europe PMC

SASDKY9 – A minimal intact methyltransferase of a type I restriction-modification system

Type I restriction-modification system methyltransferase subunit
Protein Ocr
MWI(0) 186 kDa
MWexpected 171 kDa
VPorod 354 nm3
log I(s) 5.89×101 5.89×100 5.89×10-1 5.89×10-2
Type I restriction-modification system methyltransferase subunit Protein Ocr small angle scattering data  s, nm-1
ln I(s)
Type I restriction-modification system methyltransferase subunit Protein Ocr Guinier plot ln 5.90×101 Rg: 4.2 nm 0 (4.2 nm)-2 s2
(sRg)2I(s)/I(0)
Type I restriction-modification system methyltransferase subunit Protein Ocr Kratky plot 1.104 0 3 sRg
p(r)
Type I restriction-modification system methyltransferase subunit Protein Ocr pair distance distribution function Rg: 4.3 nm 0 Dmax: 15.9 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Type I restriction-modification system methyltransferase subunit Protein Ocr DAMMIF model

Synchrotron SAXS data from solutions of A minimal intact methyltransferase of a type I restriction-modification system in 20 mM Tris-HCl,150 mM NaCl, pH 7.5 were collected on the 4C beam line at the Pohang Accelerator Laboratory storage ring (Pohang, South Korea) using a Rayonix SX165 detector at a sample-detector distance of 4 m and at a wavelength of λ = 0.0734 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 100.00 μl sample at 7 mg/ml was injected at a 0.06 ml/min flow rate onto a Agilent Bio SEC-5, 300Å column at 25°C. One 10 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.

Type I restriction-modification system methyltransferase subunit
Mol. type   Protein
Organism   Vibrio vulnificus (strain YJ016)
Olig. state   Dimer
Mon. MW   71.8 kDa
 
UniProt   Q7MJG0
Sequence   FASTA
 
Protein Ocr
Mol. type   Protein
Organism   Escherichia phage T7
Olig. state   Dimer
Mon. MW   13.8 kDa
 
UniProt   P03775
Sequence   FASTA