4MNK

Crystal Structure of GH18 Chitinase from Cycas revoluta in complex with (GlcNAc)3

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	293	60% v/v Tacsimate, 0.1M BIS-TRIS propane, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.06	40.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.822	α = 90
b = 64.036	β = 90
c = 85.986	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	95	CCD	ADSC QUANTUM 315r		2012-05-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-17A	0.98	Photon Factory	BL-17A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	1.29	51.36	99.9	0.051	62.4	9.5		80890			9.3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.29	1.31	100		0.22	10.2	8.5	34026

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3ALF	1.29	50	76756	4056	99.9	0.18303	0.18219	0.19894	RANDOM	11.128

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]
0.67			-0.33		-0.34

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.798
r_dihedral_angle_4_deg	12.223
r_dihedral_angle_3_deg	11.576
r_dihedral_angle_1_deg	5.085
r_scangle_it	1.667
r_sphericity_free	1.309
r_angle_refined_deg	1.046
r_scbond_it	1.032
r_sphericity_bonded	0.819
r_mcangle_it	0.746

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.798
r_dihedral_angle_4_deg	12.223
r_dihedral_angle_3_deg	11.576
r_dihedral_angle_1_deg	5.085
r_scangle_it	1.667
r_sphericity_free	1.309
r_angle_refined_deg	1.046
r_scbond_it	1.032
r_sphericity_bonded	0.819
r_mcangle_it	0.746
r_rigid_bond_restr	0.568
r_mcbond_it	0.402
r_chiral_restr	0.073
r_bond_refined_d	0.006
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2676
Nucleic Acid Atoms
Solvent Atoms	300
Heterogen Atoms	95

Software

Software
Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

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.