The Active Conformation of Glutamate Synthase and its Binding to Ferredoxin

van den Heuvel R, Svergun D, Petoukhov M, Coda A, Curti B, Ravasio S, Vanoni M, Mattevi A, Journal of Molecular Biology 330(1):113-128 (2003) DOI

SASDLN7 – 1:1 complex of Ferredoxin-dependent glutamate synthase 2 (FdGlts) with ferredoxin

Ferredoxin-dependent glutamate synthase 2
Ferredoxin-1
MWexperimental 191 kDa
MWexpected 180 kDa
VPorod 262 nm3
log I(s) 9.94×102 9.94×101 9.94×100 9.94×10-1
Ferredoxin-dependent glutamate synthase 2 Ferredoxin-1 small angle scattering data  s, nm-1
ln I(s)
Ferredoxin-dependent glutamate synthase 2 Ferredoxin-1 Guinier plot ln 9.95×102 Rg: 3.6 nm 0 (3.6 nm)-2 s2
(sRg)2I(s)/I(0)
Ferredoxin-dependent glutamate synthase 2 Ferredoxin-1 Kratky plot 1.104 0 3 sRg
p(r)
Ferredoxin-dependent glutamate synthase 2 Ferredoxin-1 pair distance distribution function Rg: 3.7 nm 0 Dmax: 12.3 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Ferredoxin-dependent glutamate synthase 2 Ferredoxin-1 OTHER model

Synchrotron SAXS data from the 1:1 complex formed between ferredoxin-dependent glutamate synthase 2 (FdGlts) and ferredoxin in Hepes– KOH buffer, pH 7.5 were collected on the EMBL X33 beam line at the DORIS III storage ring (DESY, Hamburg, Germany) using a 1D Gas detector detector at a sample-detector distance of 2.2 m and at a wavelength of λ = 0.15 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). Solute concentrations ranging between 3 and 17 mg/ml were measured . The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted. The low angle data collected at lower concentration were merged with the highest concentration high angle data to yield the final composite scattering curve.

Experimental temperature: UNKNOWN. X-ray exposure time: UNKNOWN. Specific buffer composition: UNKNOWN.

Tags: X33
Ferredoxin-dependent glutamate synthase 2 (FdGlts)
Mol. type   Protein
Organism   Synechocystis sp. (strain PCC 6803 / Kazusa)
Olig. state   Monomer
Mon. MW   169.5 kDa
 
UniProt   P55038 (1-1556)
Sequence   FASTA
 
Ferredoxin-1 (Fd)
Mol. type   Protein
Organism   Nostoc sp. (strain ATCC 29151 / PCC 7119)
Olig. state   Monomer
Mon. MW   10.8 kDa
 
UniProt   P0A3C8 (1-99)
Sequence   FASTA