2QNO

Crystal Structure of the Mutant E55Q of the Cellulase CEL48F in Complex with a Thio-Oligosaccharide

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1FCE	PDB ENTRY 1FCE

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	298	50 mM Sodium-HEPES, 8 % w/v PEG 4000, 20 mM Calcium chloride, 8 mM Thio-oligosaccharide IG10, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.77

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.24	α = 90
b = 84.72	β = 90
c = 121.74	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	288	IMAGE PLATE	MAR scanner 345 mm plate		1998-10-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X11	0.91	EMBL/DESY, HAMBURG	X11

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	2	29.303	95.2	0.078	6.7	3.9	41553	41188		3	16.4

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)
	2	2.05	95.2		0.1999	3	3.3	2761

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 ENTRY 1FCE	2	29.303	41164	2096	94.52	0.14	0.137	0.182	RANDOM	16.977

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]
0.1			-0.69		0.59

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.849
r_dihedral_angle_4_deg	14.238
r_dihedral_angle_3_deg	13.191
r_dihedral_angle_1_deg	6.047
r_scangle_it	3.406
r_scbond_it	2.331
r_mcangle_it	1.47
r_angle_refined_deg	1.334
r_mcbond_it	0.946
r_nbtor_refined	0.31

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.849
r_dihedral_angle_4_deg	14.238
r_dihedral_angle_3_deg	13.191
r_dihedral_angle_1_deg	6.047
r_scangle_it	3.406
r_scbond_it	2.331
r_mcangle_it	1.47
r_angle_refined_deg	1.334
r_mcbond_it	0.946
r_nbtor_refined	0.31
r_nbd_refined	0.193
r_symmetry_vdw_refined	0.166
r_symmetry_hbond_refined	0.153
r_xyhbond_nbd_refined	0.134
r_chiral_restr	0.097
r_metal_ion_refined	0.071
r_bond_refined_d	0.013
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5071
Nucleic Acid Atoms
Solvent Atoms	412
Heterogen Atoms	101

Software

Software
Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
DENZO	data reduction
AMoRE	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.