5G56

THE TETRA-MODULAR CELLULOSOMAL ARABINOXYLANASE CtXyl5A STRUCTURE AS REVEALED BY X-RAY CRYSTALLOGRAPHY

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2Y8K	PDB ENTRIES 2Y8K, 3MPC, 2Y8M, 2Y9I AND 2Y9S
experimental model	PDB	3MPC	PDB ENTRIES 2Y8K, 3MPC, 2Y8M, 2Y9I AND 2Y9S
experimental model	PDB	2Y8M	PDB ENTRIES 2Y8K, 3MPC, 2Y8M, 2Y9I AND 2Y9S
experimental model	PDB	2Y9I	PDB ENTRIES 2Y8K, 3MPC, 2Y8M, 2Y9I AND 2Y9S
experimental model	PDB	2Y9S	PDB ENTRIES 2Y8K, 3MPC, 2Y8M, 2Y9I AND 2Y9S

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7		40% (V/V) 2-METHYL-2-4PENTANEDIOL (MPD), pH 7

Crystal Properties
Matthews coefficient	Solvent content
3.66	68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 147.41	α = 90
b = 191.73	β = 90
c = 50.7	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	100	CCD	ADSC QUANTUM 315		2009-12-04	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	2.64	50.7	98.5	0.16	8	5.8		42246

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	2.64	2.78	96.4		0.7	2	5

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	PDB ENTRIES 2Y8K, 3MPC, 2Y8M, 2Y9I AND 2Y9S	2.64	50.7	40074	2125	97.7	0.23928	0.23726	0.278	RANDOM

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_2_deg	36.391
r_dihedral_angle_4_deg	15.971
r_dihedral_angle_3_deg	12.726
r_dihedral_angle_1_deg	6.356
r_long_range_B_refined	3.755
r_long_range_B_other	3.575
r_mcangle_it	1.411
r_mcangle_other	1.411
r_angle_refined_deg	1.211
r_scangle_other	1.12
r_angle_other_deg	0.886
r_mcbond_it	0.765
r_mcbond_other	0.765
r_scbond_it	0.646
r_scbond_other	0.646
r_chiral_restr	0.071
r_bond_refined_d	0.008
r_gen_planes_refined	0.004
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5446
Nucleic Acid Atoms
Solvent Atoms	227
Heterogen Atoms	19

Software

Software
Software Name	Purpose
REFMAC	refinement
iMOSFLM	data reduction
SCALA	data scaling
PHASER	phasing