2C79

The structure of a family 4 acetyl xylan esterase from Clostridium thermocellum in complex with a colbalt ion.

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2C71	PDB ENTRY 2C71

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				0.2M MGCL2,20% PEG 3350 FOLLOWED BY A 5MM COCL2 SOAK

Crystal Properties
Matthews coefficient	Solvent content
1.5	18.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 105.775	α = 90
b = 105.775	β = 90
c = 35.349	γ = 90

Symmetry
Space Group	P 41 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	ADSC CCD	TOROIDAL MIRROR	2005-09-05	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	1.5	37.4	99.9	0.04	26.4	7.1		32768

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	1.5	1.58	100		0.12	13	7.2

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 2C71	1.5	74.74	31066	1656	99.9	0.132	0.13	0.14	0.172	0.17	RANDOM	12.98

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]
-0.06			-0.06		0.13

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.711
r_dihedral_angle_4_deg	22.617
r_dihedral_angle_3_deg	12.776
r_dihedral_angle_1_deg	5.702
r_scangle_it	5.489
r_scbond_it	4.055
r_mcangle_it	2.755
r_mcbond_it	1.985
r_angle_refined_deg	1.663
r_nbtor_refined	0.318
r_chiral_restr	0.295
r_symmetry_vdw_refined	0.249
r_nbd_refined	0.217
r_symmetry_hbond_refined	0.197
r_xyhbond_nbd_refined	0.162
r_bond_refined_d	0.018
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_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	1587
Nucleic Acid Atoms
Solvent Atoms	335
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling