1UP3

Structure of the endoglucanase Cel6 from Mycobacterium tuberculosis in complex with METHYL-CELLOBIOSYL-4-DEOXY-4-THIO-BETA-D-CELLOBIOSIDE at 1.6 angstrom

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
other		COMPLEX WITH SDP5

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		14 % PEG 4K, 100 MM MES 6.5, 200 MM LISO4. THE PROTEIN WAS AT 10MG/ML AND INCUBATED WITH 1 MM OF LIGAND FOR 1 HOUR PRIOR CRYSTALLISATION. 30 % PEG 400 WAS ADDED AS CRYOPROTECTANT, pH 6.50

Crystal Properties
Matthews coefficient	Solvent content
2.03	39.06

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.893	α = 90
b = 93.058	β = 90
c = 46.69	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	120	CCD	ADSC CCD		2003-07-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4		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	1.6	20	98.6	0.097	13.2	4.7		35625		2

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	1.6	1.66	95.6		0.393	3	3.7

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	MOLECULAR REPLACEMENT	THROUGHOUT	COMPLEX WITH SDP5	1.6	19.84	33839	1785	98.2	0.14	0.138	0.174	RANDOM	9.98

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]
0.08			-0.2		0.12

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.49
r_scangle_it	4.284
r_scbond_it	2.628
r_angle_other_deg	1.712
r_mcangle_it	1.578
r_angle_refined_deg	1.57
r_mcbond_it	0.889
r_nbd_other	0.256
r_symmetry_vdw_other	0.247
r_nbd_refined	0.219
r_symmetry_vdw_refined	0.216
r_symmetry_hbond_refined	0.163
r_xyhbond_nbd_refined	0.14
r_chiral_restr	0.095
r_nbtor_other	0.085
r_bond_refined_d	0.014
r_gen_planes_refined	0.008
r_bond_other_d	0.004
r_gen_planes_other	0.004
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2143
Nucleic Acid Atoms
Solvent Atoms	327
Heterogen Atoms	102

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling