Conformational multiplicity of bacterial ferric binding protein revealed by small angle x-ray scattering and molecular dynamics calculations

Liu G, Ekmen E, Jalalypour F, Mertens H, Jeffries C, Svergun D, Atilgan A, Atilgan C, Sayers Z
The Journal of Chemical Physics 158(8) (2023 Feb 24)

doi: 10.1063/5.0136558

Submitted to SASBDB: 2025 Feb 13 Published in SASBDB: 2025 Jul 28

SASDWG7 – D52A mutant of ferric binding protein (FbpA) in apo (no Fe) form in low ionic strength (LIS) buffer (1/10 PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 1 mM Na2HPO4.7H2O, 0.18 mM KH2PO4, 13.7 mM NaCl, 0.27 mM KCl, 5%v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2020 Aug 20 RgGuinier 2.1 nm Dmax 6.3 nm VolumePorod 28 nm3

SASDWH7 – Wild type ferric binding protein (FbpA) in holo (with Fe) form in high ionic strength (HIS) buffer (PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 10 mM Na2HPO4 . 7H2O 1.8 mM KH2PO4 137 mM NaCl 2.7 mM KCl 5% v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2020 Aug 20 RgGuinier 2.0 nm Dmax 6.2 nm VolumePorod 34 nm3

SASDWJ7 – Wild type ferric binding protein (FbpA) in apo (no Fe) form in high ionic strength (HIS) buffer (PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 10 mM Na2HPO4 . 7H2O 1.8 mM KH2PO4 137 mM NaCl 2.7 mM KCl 5% v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2019 Dec 9 RgGuinier 2.1 nm Dmax 6.5 nm VolumePorod 39 nm3

SASDWK7 – D52A mutant of ferric binding protein (FbpA) in holo (with Fe) form in high ionic strength (HIS) buffer (PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 10 mM Na2HPO4 . 7H2O 1.8 mM KH2PO4 137 mM NaCl 2.7 mM KCl 5% v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2019 Dec 9 RgGuinier 2.0 nm Dmax 5.9 nm VolumePorod 33 nm3

SASDWL7 – D52A mutant of ferric binding protein (FbpA) in apo (no Fe) form in high ionic strength (HIS) buffer (PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 10 mM Na2HPO4 . 7H2O 1.8 mM KH2PO4 137 mM NaCl 2.7 mM KCl 5% v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2019 Sep 19 RgGuinier 2.1 nm Dmax 6.2 nm VolumePorod 40 nm3

SASDWM7 – D52A mutant of ferric binding protein (FbpA) in holo (with Fe) form in low ionic strength (LIS) buffer (1/10 PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 1 mM Na2HPO4.7H2O, 0.18 mM KH2PO4, 13.7 mM NaCl, 0.27 mM KCl, 5%v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2020 Aug 20 RgGuinier 2.0 nm Dmax 6.1 nm VolumePorod 24 nm3

SASDWN7 – Wild type ferric binding protein (FbpA) in apo (no Fe) form in low ionic strength (LIS) buffer (1/10 PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 1 mM Na2HPO4.7H2O, 0.18 mM KH2PO4, 13.7 mM NaCl, 0.27 mM KCl, 5%v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2020 Aug 20 RgGuinier 2.1 nm Dmax 6.3 nm VolumePorod 35 nm3

SASDWP7 – Wild type ferric binding protein (FbpA) in holo (with Fe) form in low ionic strength (LIS) buffer (1/10 PBS) Sample: Iron-utilization periplasmic protein monomer, 34 kDa Haemophilus influenzae protein Buffer: 1 mM Na2HPO4.7H2O, 0.18 mM KH2PO4, 13.7 mM NaCl, 0.27 mM KCl, 5%v/v Glycerol, pH: 7.4 Experiment: SAXS data collected at EMBL P12, PETRA III on 2020 Aug 20 RgGuinier 2.0 nm Dmax 6.1 nm VolumePorod 29 nm3