Structural Insights into the Intracellular Region of the Human Magnesium Transport Mediator CNNM4.

Giménez-Mascarell P, Oyenarte I, González-Recio I, Fernández-Rodríguez C, Corral-Rodríguez MÁ, Campos-Zarraga I, Simón J, Kostantin E, Hardy S, Díaz Quintana A, Zubillaga Lizeaga M, Merino N, Diercks T, Blanco FJ, Díaz Moreno I, Martínez-Chantar ML, Tremblay ML, Müller D, Siliqi D, Martínez-Cruz LA, Int J Mol Sci 20(24) (2019) Europe PMC

SASDER8 – Cyclic nucleotide homology domain of the human Cyclin and CBS domain divalent metal cation transport mediator-4

CNNM4_cNMP
MWexperimental 32 kDa
MWexpected 42 kDa
VPorod 102 nm3
log I(s) 2.47×10-3 2.47×10-4 2.47×10-5 2.47×10-6
CNNM4_cNMP small angle scattering data  s, nm-1
ln I(s)
CNNM4_cNMP Guinier plot ln 2.48×10-3 Rg: 2.6 nm 0 (2.6 nm)-2 s2
(sRg)2I(s)/I(0)
CNNM4_cNMP Kratky plot 1.104 0 3 sRg
p(r)
CNNM4_cNMP pair distance distribution function Rg: 2.6 nm 0 Dmax: 9.7 nm

Data validation


Fits and models


log I(s)
 s, nm-1
CNNM4_cNMP GASBOR model

log I(s)
 s, nm-1
CNNM4_cNMP PISA model

Synchrotron SAXS data from solutions of Cyclic nucleotide homology domain of the human Cyclin and CBS domain divalent metal cation transport mediator-4 in HEPES buffer pH 7.4, 200 mM NaCl , 1mM DTT, pH 7.4 were collected using size-exclusion chromatography SAXS (SEC-SAXS) on the B21 camera at the Diamond Light Source storage ring (Oxfordshire, UK) using a Pilatus 2M detector at a sample-detector distance of 4.0 m and at a wavelength of λ = 0.1 nm (l(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). The data obtained through the sample elution peak (collected as 620 successive 3 second frames) were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted and the individual subtracted data sets were scaled and averaged to generate the scattering profile displayed in this entry.

SEC-SAXS was performed at 20°C using the following parameters: Column: Shodex KW-403 ; Flow rate: 0.08 mL/min; Total acquisition time: 1860s; Sample injection concentration: 7 mg/mL; Injection volume: 45μL.

CNNM4_cNMP
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Dimer
Mon. MW   20.9 kDa
Sequence   FASTA
 
PDB ID   6G52