Structures of three MORN repeat proteins and a re-evaluation of the proposed lipid-binding properties of MORN repeats.

Sajko S, Grishkovskaya I, Kostan J, Graewert M Setiawan K, Trübestein L, Niedermüller K, Gehin C, Sponga A, Puchinger M, Gavin AC, Leonard TA, Svergun DI, Smith TK, Morriswood B, Djinovic-Carugo K, PLoS One 15(12):e0242677 (2020) Europe PMC

SASDGA7 – Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN1 repeats 7-15

Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15)
MWexperimental 46 kDa
MWexpected 52 kDa
VPorod 56 nm3
log I(s) 2.82×103 2.82×102 2.82×101 2.82×100
Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15) small angle scattering data  s, nm-1
ln I(s)
Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15) Guinier plot ln 2.83×103 Rg: 4.1 nm 0 (4.1 nm)-2 s2
(sRg)2I(s)/I(0)
Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15) Kratky plot 1.104 0 3 sRg
p(r)
Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15) pair distance distribution function Rg: 4.4 nm 0 Dmax: 15.5 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15) CUSTOM IN-HOUSE model

Synchrotron SAXS data from solutions of Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN1 repeats 7-15 in 20 mM Tris-HCl, 200 mM NaCl, 2% (w/v) glycerol, 0.5 mM DTT, pH 8.5 were collected on the EMBL P12 beam line at the PETRA III storage ring (DESY; Hamburg, Germany) using a Pilatus 2M detector at a sample-detector distance of 3 m and at a wavelength of λ = 0.124 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 100.00 μl sample at 3.8 mg/ml was injected at a 0.50 ml/min flow rate onto a GE Superdex 200 Increase 10/300 column at 20°C. 60 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.

Storage temperature = UNKNOWN

Trypanosoma brucei Membrane Occupation and Recognition Nexus MORN (7-15) (tbMORNdelta6)
Mol. type   Protein
Organism   Trypanosoma brucei
Olig. state   Dimer
Mon. MW   25.9 kDa
 
UniProt   Q587D3 (143-358)
Sequence   FASTA