Table 3 SAXS data collection and refinement statistics

From: Peripheral membrane protein endophilin B1 probes, perturbs and permeabilizes lipid bilayers

(a) Sample details
	Endophilin B1_wt 0.69 mg/ml	Endophilin B1_wt 0.34 mg/ml	Endophilin B1_wt 0.14 mg/ml	Endophilin B1_ΔSH₃
Description of sequence	Endophilin-B1 (Q9Y371) from Homo sapiens
	Full-length			Truncated (1–306a.a.)
Extinction coefficient ε (M⁻¹ cm⁻¹)	29,130 (280 nm)			19,160 (280 nm)
Partial specific volume (cm³/g)	0.72865			0.60219
Mean solute and solvent SLD (10⁻⁶ Å⁻²)²	12.475/9.465			15.094/9.465
Mean scattering contrast (10⁻⁶ Å⁻²)²	3.010			5.629
Molecular mass (Da)²	40,794			34,219
Sample concentration (mg/ml)	0.69	0.34	0.14	2.5
Solvent composition	150 mM NaCl, 20 mM HEPES, 1 mM TCEP, 0.5 mM DTT, pH 8.1
(b) SAS data collection parameters
Instrument	ESRF BM29
Wavelength (Å)	0.9918
Beam geometry	Size: 700 × 700 µm²; Sample-to-detector distance: 2.827 m
Sample configuration	1.0 mm-diameter quartz capillary
q-measurement range (Å⁻¹)	0.0025–0.6
Absolute scaling method	Comparison with scattering from pure H₂O
Basis for normalization to constant counts	To transmitted intensity by direct beam counter
Exposure time	15 s
Sample temperature (°C)	4
(c) Software employed for SAS data reduction, analysis and interpretation
SAS data averaging and subtraction	PRIMUS from ATSAS 3.2.1
Calculation of ε from sequence	ProtParam: https://web.expasy.org/protparam/
Calculation of values from chemical composition	Peptide Property Calculator: http://biotools.nubic.northwestern.edu/proteincalc.html
Calculation of values from chemical composition	SLD calculator web: http://www.refcalc.appspot.com/sld
Guinier, P(r)	GNOM from ATSAS
Atomic structure map modeling	DENSSWeb (v 1.7.0): https://denss.ccr.buffalo.edu
Molecular graphics	ChimeraX-1.6.1
(d) Structural parameters
Guinier analysis	Endophilin B1_wt 0.69 mg/ml	Endophilin B1_wt 0.34 mg/ml	Endophilin B1_wt 0.14 mg/ml	Endophilin B1_ΔSH₃
I(0) (cm⁻¹)	73.13 ± 0.28	66.06 ± 0.57	43.00 ± 0.75	31.25 ± 0.07
R_G (Å)	50.59 ± 2.34	49.67 ± 6.09	36.88 ± 9.56	46.18 ± 2.62
q R_G-range	0.5748–1.4567	0.4702–1.3158	0.4571–1.3367	0.4632–1.3461
P(r) analysis
I(0) (cm⁻¹)	72.26 ± 0.23	65.95 ± 0.36	45.16 ± 0.65	31.42 ± 0.06
R_G (Å)	51.05 ± 1.70	51.04 ± 3.60	42.70 ± 6.5	47.60 ± 1.1
d_max (Å)	160	160	153	152
q-range (Å⁻¹)	0.0114–0.3009	0.0095–0.3009	0.0124–0.3009	0.0085-0.2390
Total quality estimate (GNOM)	0.8429	0.845	0.6489	0.552
(e) Atomistic modeling
	Endophilin B1_wt 0.69 mg/ml	Endophilin B1_wt 0.34 mg/ml	Endophilin B1_wt 0.14 mg/ml	Endophilin B1_ΔSH₃
Method	DENSS 1.7.0
q-range for fitting	0.0114–0.3009	0.0095–0.3009	0.0124–0.3009	0.0085-0.2390
Correlation score	0.933	0.934	0.947	0.969
(f) Data and model deposition IDs
	Endophilin B1_wt 0.69 mg/ml	Endophilin B1_wt 0.34 mg/ml	Endophilin B1_wt 0.14 mg/ml	Endophilin B1_ΔSH₃
	SASDVR4	SASDVS4	SASDVT4	SASDVU4

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Table 3 SAXS data collection and refinement statistics

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