2E4T

Crystal structure of Cel44A, GH family 44 endoglucanase from Clostridium thermocellum

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.8	298	14% PEG 3350, 0.1M MES-NaOH pH 5.8, 6mM ZnSO4, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.077	α = 90
b = 59.155	β = 90
c = 170.684	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	100	CCD	ADSC QUANTUM 315	mirrors	2005-11-12	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-5A	1.0000, 1.2824, 0.9800	Photon Factory	BL-5A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	0.96	50	98.9	0.127	22.1	5.3	295816	292562	-3	-3	6.373

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	0.96	0.99	91.7		0.375	2.32	2.8	26836

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	0.96	20	277615	14789	100	0.13332	0.13264	0.14606	RANDOM	9.397

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]
-0.07			-0.14		0.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.121
r_dihedral_angle_3_deg	12.878
r_dihedral_angle_4_deg	10.82
r_sphericity_free	9.999
r_dihedral_angle_1_deg	6.166
r_scangle_it	3.859
r_sphericity_bonded	3.843
r_scbond_it	2.907
r_mcangle_it	2.032
r_angle_refined_deg	1.788
r_rigid_bond_restr	1.514
r_mcbond_it	1.452
r_nbtor_refined	0.318
r_chiral_restr	0.225
r_nbd_refined	0.212
r_symmetry_vdw_refined	0.138
r_xyhbond_nbd_refined	0.112
r_symmetry_hbond_refined	0.075
r_metal_ion_refined	0.064
r_symmetry_metal_ion_refined	0.032
r_bond_refined_d	0.017
r_gen_planes_refined	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4012
Nucleic Acid Atoms
Solvent Atoms	574
Heterogen Atoms	27

Software

Software
Software Name	Purpose
REFMAC	refinement
PF	data collection
DENZO	data reduction
SCALEPACK	data scaling
SHELXE	model building