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