3HBE

Class IV chitinase structure from Picea abies at 1.55A

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	296	20% w/v polyethylene glycol 3000, 0.1M citrate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 296K

Crystal Properties
Matthews coefficient	Solvent content
1.87	34.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 67.194	α = 90
b = 65.792	β = 90
c = 36.496	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 315r		2006-03-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.9395	ESRF	ID14-4

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	1.55	50	97.4	0.088	16.7			23744

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)
	1.55	1.63	92.6		0.219	6.3

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	REFMAC 5.2.0019 rigidbody refinement	THROUGHOUT	Structure of Picea abies chitinase (PDB entry 3HBD)	1.55	50	22318	1202	97.05	0.16419	0.16261	0.19382	RANDOM	14.49

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]
0.53			-0.32		-0.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.844
r_dihedral_angle_3_deg	11.903
r_dihedral_angle_1_deg	4.298
r_dihedral_angle_4_deg	3.297
r_scangle_it	2.94
r_scbond_it	1.909
r_mcangle_it	1.144
r_angle_refined_deg	1.045
r_mcbond_it	0.717
r_nbtor_refined	0.306
r_nbd_refined	0.204
r_symmetry_vdw_refined	0.172
r_symmetry_hbond_refined	0.146
r_xyhbond_nbd_refined	0.114
r_chiral_restr	0.069
r_bond_refined_d	0.009
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1567
Nucleic Acid Atoms
Solvent Atoms	226
Heterogen Atoms	11

Software

Software
Software Name	Purpose
ADSC	data collection
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
REFMAC	phasing