4S2D

Joint X-ray/neutron structure of Trichoderma reesei xylanase II in complex with MES at pH 5.7

X-RAY DIFFRACTION - NEUTRON DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6	290	1.5M MES, 0.2M NaI, PEG8000, VAPOR DIFFUSION, SITTING DROP, temperature 290K, pH 6.0

Crystal Properties
Matthews coefficient	Solvent content
2.5	50.84

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.174	α = 90
b = 60.214	β = 90
c = 70.434	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	293	IMAGE PLATE	RIGAKU RAXIS IV++	OSMIC VARIMAX	2009-10-10	M	SINGLE WAVELENGTH
2	1	neutron	291	AREA DETECTOR	3HE POSITION SENSITIVE DETECTOR		2010-02-02

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.54
2	NUCLEAR REACTOR	OTHER			PCS

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	1.55	40	97.9	0.046						22.2	4		30402
2	2	22.85	85.5	0.223						5	3.3		12398		1.4

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	1.55	1.61		0.203						4.6	2.4
2	2	2.11		0.369						1.6	2

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	1.6	19.99			28247	26744	1351	94.7			0.192	0.196	RANDOM	22.77
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	2	19.99			14658	11689	588	79.7			0.243	0.279	RANDOM	22.77

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	23.5
x_dihedral_angle_d	23.5
x_improper_angle_d	2.62
x_improper_angle_d	2.62
x_angle_deg	1
x_angle_deg	1
x_bond_d	0.01
x_bond_d	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1480
Nucleic Acid Atoms
Solvent Atoms	151
Heterogen Atoms	13

Software

Software
Software Name	Purpose
nCNS	refinement
HKL-2000	data collection
d*TREK	data scaling
HKL-2000	data reduction
d*TREK	data reduction
HKL-2000	data scaling
CNS	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 R01GM133198.