Assembly of higher-order SMN oligomers is essential for metazoan viability and requires an exposed structural motif present in the YG zipper dimer.

Gupta K Wen Y, Ninan NS, Raimer AC, Sharp R, Spring AM, Sarachan KL, Johnson MC, Van Duyne GD, Matera AG, Nucleic Acids Res 49(13):7644-7664 (2021) Europe PMC

SASDL95 – Drosophila Melanogaster Gemin2-SMN: Octamer analyzed by SVD-EFA SEC-SAXS

Protein Gemin2
Survival motor neuron protein
MWexperimental 408 kDa
MWexpected 427 kDa
VPorod 2660 nm3
log I(s) 1.86×103 1.86×102 1.86×101 1.86×100
Protein Gemin2 Survival motor neuron protein small angle scattering data  s, nm-1
ln I(s)
Protein Gemin2 Survival motor neuron protein Guinier plot ln 1.87×103 Rg: 7.8 nm 0 (7.8 nm)-2 s2
(sRg)2I(s)/I(0)
Protein Gemin2 Survival motor neuron protein Kratky plot 1.104 0 3 sRg
p(r)
Protein Gemin2 Survival motor neuron protein pair distance distribution function Rg: 9.0 nm 0 Dmax: 28.7 nm

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of an MBP-Survival motor neuron protein fusion in 20 mM Na/KPO4 pH 7.0, 300 mM NaCl, 1 mM DTT, were collected on the 12.3.1 (SIBYLS) beam line at the Advanced Light Source (ALS; Berkeley, CA, USA) using a Pilatus3 X 2M detector at a sample-detector distance of 1.5 m and at a wavelength of λ = 0.103 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 60.00 μl sample at 2.5 mg/ml was injected at a 0.50 ml/min flow rate onto a Shodex KW-800 series column at 4°C. 589 successive 1 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.

Component SAXS profile calculated using singular value decomposition evolving factor analysis (SVD-EFA).

Protein Gemin2 (Gemin2)
Mol. type   Protein
Organism   Drosophila melanogaster
Olig. state   Octamer
Mon. MW   28.8 kDa
 
UniProt   Q9VVX0 (1-245)
Sequence   FASTA
 
Survival motor neuron protein (SMN)
Mol. type   Protein
Organism   Drosophila melanogaster
Olig. state   Octamer
Mon. MW   24.6 kDa
 
UniProt   Q9VV74 (1-226)
Sequence   FASTA