3HBH

Class IV chitinase structure from Picea abies at 2.25A

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
1.91	35.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 67.584	α = 90
b = 66.415	β = 90
c = 36.607	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	MARMOSAIC 225 mm CCD			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-2	0.8726	ESRF	ID23-2

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	2.25	50	99.1	0.105				8202

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)
	2.25	2.29	92.9		0.225

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)	2.25	36.61	7796	377	98.79	0.15713	0.15377	0.22482	RANDOM	14.472

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]
0.04			-0.08		0.04

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.08
r_dihedral_angle_3_deg	15.163
r_dihedral_angle_4_deg	6.604
r_dihedral_angle_1_deg	5.611
r_scangle_it	4.251
r_scbond_it	2.913
r_mcangle_it	1.721
r_angle_refined_deg	1.642
r_mcbond_it	0.974
r_nbtor_refined	0.303
r_symmetry_vdw_refined	0.247
r_nbd_refined	0.198
r_symmetry_hbond_refined	0.182
r_xyhbond_nbd_refined	0.147
r_chiral_restr	0.109
r_bond_refined_d	0.021
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1511
Nucleic Acid Atoms
Solvent Atoms	116
Heterogen Atoms

Software

Software
Software Name	Purpose
MAR345dtb	data collection
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	phasing