1ITX

Catalytic Domain of Chitinase A1 from Bacillus circulans WL-12

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1CTN	PDB ENTRY 1CTN

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.3	293	PEG 4000, potassium dihydrophosphate, pH 5.3, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.97	37.21

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.0073	α = 109.2931
b = 46.8388	β = 95.4547
c = 55.7001	γ = 116.6796

Symmetry
Space Group	P 1

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	MARRESEARCH		2001-05-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU	0.50000	SPring-8	BL41XU

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	1.1	36.793	98.1	0.042	0.042	10.1	1.9	139823	139823			5.943

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.1	1.13	97.2		0.248	0.248	2.4	1.9	10242

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	THROUGHOUT	PDB ENTRY 1CTN	1.1	36.793	139823	139823	7125	98.1	0.11735	0.11735	0.11628	0.13719	RANDOM	8.354

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
r_dihedral_angle_3_deg	16.2
r_dihedral_angle_1_deg	5.181
r_sphericity_free	2.912
r_scangle_it	2.764
r_sphericity_bonded	2.237
r_scbond_it	1.966
r_angle_refined_deg	1.675
r_mcangle_it	1.573
r_rigid_bond_restr	1.17
r_nbtor_other	1.137
r_mcbond_it	1.077
r_angle_other_deg	0.864
r_nbd_refined	0.831
r_nbd_other	0.466
r_symmetry_vdw_other	0.304
r_symmetry_vdw_refined	0.293
r_xyhbond_nbd_refined	0.17
r_symmetry_hbond_refined	0.166
r_chiral_restr	0.103
r_bond_refined_d	0.012
r_gen_planes_refined	0.008
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_symmetry_hbond_other
r_xyhbond_nbd_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3221
Nucleic Acid Atoms
Solvent Atoms	770
Heterogen Atoms	66

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
ARP/wARP	model building
REFMAC	refinement
CCP4	data scaling