Solution structure of the type I polyketide synthase Pks13 from Mycobacterium tuberculosis.

Bon C, Cabantous S, Julien S, Guillet V, Chalut C, Rima J, Brison Y, Malaga W, Sanchez-Dafun A, Gavalda S, Quémard A, Marcoux J, Waldo GS, Guilhot C, Mourey L, BMC Biol 20(1):147 (2022) Europe PMC

SASDNK9 – Monomer of the full-length apo-polyketide synthase Pks13 of Mycobacterium tuberculosis

Polyketide synthase Pks13
MWI(0) 214 kDa
MWexpected 188 kDa
VPorod 480 nm3
log I(s) 4.28×10-1 4.28×10-2 4.28×10-3 4.28×10-4
Polyketide synthase Pks13 small angle scattering data  s, nm-1
ln I(s)
Polyketide synthase Pks13 Guinier plot ln 4.28×10-1 Rg: 7.3 nm 0 (7.3 nm)-2 s2
Polyketide synthase Pks13 Kratky plot 1.104 0 3 sRg
Polyketide synthase Pks13 pair distance distribution function Rg: 7.7 nm 0 Dmax: 24.8 nm

Data validation

Fits and models

log I(s)
 s, nm-1
Polyketide synthase Pks13 DAMMIN model

Synchrotron SAXS data from solutions of full-length apo-polyketide synthase Pks13 of Mycobacterium tuberculosis in 50 mM Tris-HCl, 50 mM NaCl, pH 8 were collected on the SWING beam line at the SOLEIL storage ring (Saint-Aubin, France) using a AVIEX PCCD170170 detector at a wavelength of λ = 0.103 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). Solute concentrations ranging between 2 and 10.4 mg/ml were measured at 12°C. 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.

Sample detector distance = UNKNOWN. Number of frames = UNKNOWN

Polyketide synthase Pks13 (Pks13)
Mol. type   Protein
Organism   Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Olig. state   Monomer
Mon. MW   188.0 kDa
UniProt   I6X8D2 (1-1733)
Sequence   FASTA