SAXS analysis of EccA5 N-terminal domain and EspG5 of ESX-5 secretion pathway of Mycobacterium tuberculosis

Rajlakshmi K.

SASDWF7 – EccA5-N terminal domain and EspG5 complex of ESX-5 secretion pathway of Mycobacterium tuberculosis

ESX-5 secretion-associated protein EspG5
ESX-5 secretion system protein EccA5 N-terminal domain
MWexperimental 53 kDa
MWexpected 63 kDa
VPorod 84 nm3
log I(s) 6.66×104 6.66×103 6.66×102 6.66×101
ESX-5 secretion-associated protein EspG5 ESX-5 secretion system protein EccA5 N-terminal domain small angle scattering data  s, nm-1
ln I(s)
ESX-5 secretion-associated protein EspG5 ESX-5 secretion system protein EccA5 N-terminal domain Guinier plot ln 6.67×104 Rg: 3.3 nm 0 (3.3 nm)-2 s2
(sRg)2I(s)/I(0)
ESX-5 secretion-associated protein EspG5 ESX-5 secretion system protein EccA5 N-terminal domain Kratky plot 1.104 0 3 sRg
p(r)
ESX-5 secretion-associated protein EspG5 ESX-5 secretion system protein EccA5 N-terminal domain pair distance distribution function Rg: 3.4 nm 0 Dmax: 10.7 nm

Data validation


Fits and models


log I(s)
 s, nm-1
ESX-5 secretion-associated protein EspG5 ESX-5 secretion system protein EccA5 N-terminal domain DAMMIF model

SAXS data from solutions of EccA5-N terminal domain and EspG5 complex of ESX-5 secretion pathway of Mycobacterium tuberculosis in 50mM Hepes 200mM NaCl, pH 8 were collected on the Anton Paar SAXSpace instrument (CSIR-Central Drug Research Institute, Lucknow, India) using a Mythen2 R 1K detector at a sample-detector distance of 0.3 m and at a wavelength of λ = 0.154 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). One solute concentration of 4.00 mg/ml was measured at 10°C. Four successive 900 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.

ESX-5 secretion-associated protein EspG5 (EspG5)
Mol. type   Protein
Organism   Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Olig. state   Monomer
Mon. MW   32.4 kDa
 
UniProt   O53943
Sequence   FASTA
 
ESX-5 secretion system protein EccA5 N-terminal domain (EccA5NT)
Mol. type   Protein
Organism   Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Olig. state   Monomer
Mon. MW   30.9 kDa
 
UniProt   P9WPI1 (1-278)
Sequence   FASTA