The Structure of the Plakin Domain of Plectin Reveals an Extended Rod-like Shape.

Ortega E, Manso JA, Buey RM, Carballido AM, Carabias A, Sonnenberg A, de Pereda JM, J Biol Chem 291(36):18643-62 (2016) Europe PMC

SASDBD4 – Plakin domain fragment of Human desmoplakin (C-terminal region spectrin repeats: SR7-SR8-SR9)

Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9
MWexperimental 45 kDa
MWexpected 42 kDa
VPorod 69 nm3
log I(s) 9.95×103 9.95×102 9.95×101 9.95×100
Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9 small angle scattering data  s, nm-1
ln I(s)
Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9 Guinier plot ln 9.95×103 Rg: 4.4 nm 0 (4.4 nm)-2 s2
(sRg)2I(s)/I(0)
Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9 Kratky plot 1.104 0 √3 sRg
p(r)
Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9 pair distance distribution function Rg: 4.7 nm 0 Dmax: 17.5 nm

Data validation

Fits and models

log I(s)
 s, nm-1
Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9 DAMMIF model
Synchrotron SAXS data from solutions of a plakin domain fragment from Human desmoplakin (C-terminal region spectrin repeats SR7-SR8-SR9) in 20 mM sodium phosphate, 150 mM NaCl, 5% v/v glycerol, 3 mM DTT were collected on the P12 beam line of Petra-III (Hamburg, Germany) using a Pilatus 2M detector (I(s) vs s; s = 4π sin θ/λ, where 2θ is the scattering angle and λ=0.124 nm). Different solute concentrations in the range 0.96-7.70 mg/ml were measured using an exposure time of 1 s (recorded as 30 x 0.050 s frames). The data were normalized to the intensity of the transmitted beam and radially averaged and the scattering from the matched solvent-blank was subtracted. The data were normalized to protein concentration and then extrapolated to infinite dilution to simulate a zero-concentration scattering curve.

Plakin domain fragment of Human Desmoplakin encompassing spectrin repeats SR7-SR8-SR9 (Desmoplakin)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   42.0 kDa
 
UniProt   P15924 (660-1025)
Sequence   FASTA