9U7Q | pdb_00009u7q

Chitinase ChiA mutant - C61A/C79A

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		289	0.1M Bis-Tris Propane pH 8.5, 0.2M Potassium sodium tartrate tetrahydrate, 20% PEG3350, 10% Ethylene glycol

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.258	α = 90
b = 50.157	β = 95.027
c = 90.997	γ = 90

Symmetry
Space Group	C 1 2 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	PIXEL	DECTRIS PILATUS3 6M		2024-11-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRF BEAMLINE BL18U1	0.97853	SSRF	BL18U1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	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	1.6	44.46	99.9	0.063	0.999	17.7	6.6		53051

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.6	1.63			0.769	0.819

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	NONE	1.6	44.457	52977	2554	99.793	0.175	0.1733	0.1849	0.1999	0.2058	19.593

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]
-0.002		0.009	0.008		-0.007

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_6_deg	14.721
r_dihedral_angle_3_deg	11.99
r_dihedral_angle_2_deg	7.85
r_dihedral_angle_1_deg	6.408
r_lrange_it	5.095
r_lrange_other	5.073
r_scangle_it	4.353
r_scangle_other	4.352
r_scbond_it	2.897
r_scbond_other	2.896
r_mcangle_it	2.513
r_mcangle_other	2.512
r_angle_refined_deg	1.775
r_mcbond_it	1.774
r_mcbond_other	1.772
r_angle_other_deg	0.625
r_nbd_refined	0.212
r_nbtor_refined	0.19
r_symmetry_nbd_other	0.186
r_nbd_other	0.181
r_xyhbond_nbd_refined	0.116
r_symmetry_xyhbond_nbd_refined	0.1
r_chiral_restr	0.096
r_symmetry_nbd_refined	0.089
r_symmetry_nbtor_other	0.081
r_chiral_restr_other	0.061
r_gen_planes_refined	0.01
r_bond_refined_d	0.009
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3239
Nucleic Acid Atoms
Solvent Atoms	168
Heterogen Atoms	27

Software

Software
Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
XDS	data reduction
PHENIX	phasing