4S2F

Joint X-ray/neutron structure of Trichoderma reesei xylanase II at pH 4.4

X-RAY DIFFRACTION - NEUTRON DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.4	290	PEG8000, 0.1M NaOAc, 0.2M NaI, pH 4.4, VAPOR DIFFUSION, SITTING DROP, temperature 290K

Crystal Properties
Matthews coefficient	Solvent content
2.52	51.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.963	α = 90
b = 59.621	β = 90
c = 70.588	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	291	IMAGE PLATE	RIGAKU RAXIS IV++	OSMIC VARIMAX	2014-03-12	M	SINGLE WAVELENGTH
2	1	neutron	291	AREA DETECTOR	ANGER CAMERA/ORNL		2014-04-14	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.54
2	NUCLEAR REACTOR	ORNL Spallation Neutron Source BEAMLINE MANDI	2-4	ORNL Spallation Neutron Source	MANDI

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Rrim I (All)	Rpim I (All)	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	1.7	40	95.1	0.027						39.8	4		22796
2	2	50	90.6	0.253						6.2	4.8		13899		1.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	R Merge I (Observed)	R-Sym I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	R Split (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.7	1.76		0.343						2.7	4
2	2	2.11		0.271						3.2	2.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	1.7	29.81			23829	19008	951	79.8			0.199	0.211	RANDOM	28.71
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	2	9.89			14645	13048	636	89.1			0.261	0.304	RANDOM	28.71

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
x_dihedral_angle_d	15.7
x_dihedral_angle_d	15.7
x_improper_angle_d	2.01
x_improper_angle_d	2.01
x_angle_deg	1.2
x_angle_deg	1.2
x_bond_d	0.007
x_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1480
Nucleic Acid Atoms
Solvent Atoms	146
Heterogen Atoms	1

Software

Software
Software Name	Purpose
nCNS	refinement
HKL-3000	data collection
Mantid	data reduction
HKL-3000	data reduction
HKL-3000	data scaling
CNS	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.