The mechanism of allosteric activation of SYK kinase derived from multiple phospho-ITAM-bound structures

Bradshaw W, Harris G, Gileadi O, Katis V, Structure (2024) DOI

SASDUV7 – The tandem SH2 domains of Tyrosine-protein kinase SYK with a bound CD3G diphospho-ITAM peptide

Tyrosine-protein kinase SYK
T-cell surface glycoprotein CD3 gamma chain
MWexperimental 33 kDa
MWexpected 32 kDa
VPorod 56 nm3
log I(s) 2.18×10-2 2.18×10-3 2.18×10-4 2.18×10-5
Tyrosine-protein kinase SYK T-cell surface glycoprotein CD3 gamma chain small angle scattering data  s, nm-1
ln I(s)
Tyrosine-protein kinase SYK T-cell surface glycoprotein CD3 gamma chain Guinier plot ln 2.18×10-2 Rg: 2.1 nm 0 (2.1 nm)-2 s2
(sRg)2I(s)/I(0)
Tyrosine-protein kinase SYK T-cell surface glycoprotein CD3 gamma chain Kratky plot 1.104 0 3 sRg
p(r)
Tyrosine-protein kinase SYK T-cell surface glycoprotein CD3 gamma chain pair distance distribution function Rg: 2.2 nm 0 Dmax: 7.1 nm

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of the tandem SH2 domains of Tyrosine-protein kinase SYK with a bound CD3G diphospho-ITAM peptide in 10 mM HEPES, 150 mM NaCl, 1 mM TCEP, pH 7.5 were collected on the B21 beam line at the Diamond Light Source (Didcot, UK) using a Eiger 4M detector at a sample-detector distance of 3.7 m and at a wavelength of λ = 0.09408 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 45.00 μl sample at 10 mg/ml was injected at a 0.08 ml/min flow rate onto a GE Superdex 75 Increase 5/150 column at 15°C. 600 successive 3 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.

Tyrosine-protein kinase SYK (SYK)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   29.9 kDa
 
UniProt   P43405 (6-269)
Sequence   FASTA
 
T-cell surface glycoprotein CD3 gamma chain (CD3G)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   2.6 kDa
 
UniProt   P09693 (157-176)
Sequence   FASTA