8AF5

Room temperature SSX structure of GH11 xylanase from Nectria haematococca (10000 frames)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6Y0H

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	BATCH MODE	5.5	293	For crystallization, the original conditions were modified to obtain microcrystals. Initial crystals obtained from hanging drops under the precipitant condition: 1 M ammonium sulfate, 100 mM sodium citrate pH 5.5 were crushed under a stereomicroscope, using a crystal crusher tool (Hampton research). The reservoir solution was pipetted to the drop and the seed stock was collected by washing the drop with reservoir solution. The seed stock was transferred to a seed bead tube (Molecular Dimensions Ltd., UK), vortexed three times for 30 s each, with an interval of 30 s between each vortex, to get the final seed stock. Protein solution 15 mg/mL, precipitant solution, and seed stock were mixed with a ratio of 1:1:0.5. The mixture was vortexed for 30 s in ten-minute intervals. After 30 min, the microcrystals were centrifuged at 200 rpm and the supernatant was replaced with a precipitant solution. Applying the same protocol, microcrystals were obtained under two precipitant conditions i.e. Precipitant 1: 1M (NH4)2SO4, 100 mM sodium citrate pH 5.5, and Precipitant 2: 200 mM (NH4)2SO4, 100 mM sodium citrate pH 5.5 and 20% PEG 6000. Microcrystals obtained under both precipitant conditions were tested for diffraction data collection.

Crystal Properties
Matthews coefficient	Solvent content
2.04	39.61

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.55	α = 90
b = 38.85	β = 91
c = 53.57	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	295	PIXEL	DECTRIS PILATUS 6M		2019-05-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, DESY BEAMLINE P11	1.0332	PETRA III, DESY	P11

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	R Split (All)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.63	17.5	100	0.96	0.226	3.67	134		20896			20.59

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	R Split (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.63	1.66			0.189	1.68	0.66

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	6Y0H	1.63	17.16	1.34	20856	1618	99.82	0.1662	0.1625	0.2104	23.57

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	6.3865
f_angle_d	1.0682
f_chiral_restr	0.0612
f_bond_d	0.0099
f_plane_restr	0.0068

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1459
Nucleic Acid Atoms
Solvent Atoms	233
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
CrystFEL	data reduction
CrystFEL	data scaling
PHENIX	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.