Structural role of essential light chains in the apicomplexan glideosome.

Pazicky S Dhamotharan K, Kaszuba K, Mertens HDT, Gilberger T, Svergun D, Kosinski J, Weininger U, Löw C, Commun Biol 3(1):568 (2020) Europe PMC

SASDH94 – Toxoplasma gondii myosin essential light chain 2 (TgELC2) bound to myosin A C-terminus

Myosin essential light chain 2
Myosin A
MWI(0) 16 kDa
MWexpected 18 kDa
VPorod 28 nm3
log I(s) 2.12×10-2 2.12×10-3 2.12×10-4 2.12×10-5
Myosin essential light chain 2 Myosin A small angle scattering data  s, nm-1
ln I(s)
Myosin essential light chain 2 Myosin A Guinier plot ln 2.13×10-2 Rg: 1.7 nm 0 (1.7 nm)-2 s2
(sRg)2I(s)/I(0)
Myosin essential light chain 2 Myosin A Kratky plot 1.104 0 3 sRg
p(r)
Myosin essential light chain 2 Myosin A pair distance distribution function Rg: 1.7 nm 0 Dmax: 5.5 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Myosin essential light chain 2 Myosin A PYMOL model

Synchrotron SAXS data from solutions of Toxoplasma gondii myosin essential light chain 2 (TgELC2) bound to myosin A C-terminus in 20 mM HEPES pH 7.5, 150 mM NaCl, 0.5 mM TCEP were collected on the EMBL P12 beam line at the PETRA III storage ring (Hamburg, Germany) using a Pilatus 6M detector at a sample-detector distance of 3 m and at a wavelength of λ = 0.124 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 90.00 μl sample at 10 mg/ml was injected at a 0.75 ml/min flow rate onto a GE Superdex 200 Increase 10/300 column at 20.1°C. 1500 successive 0.995 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.

Myosin essential light chain 2
Mol. type   Protein
Organism   Toxoplasma gondii
Olig. state   Monomer
Mon. MW   15.5 kDa
 
UniProt   B9PZ33 (1-133)
Sequence   FASTA
 
Myosin A (TgMyoA)
Mol. type   Protein
Organism   Toxoplasma gondii
Olig. state   Monomer
Mon. MW   2.6 kDa
 
UniProt   S8G527 (777-798)
Sequence   FASTA
 
PDB ID   6TJ6