2HTX

Crystal Structure Analysis of Hen Egg White Lysozyme Crosslinked by Polymerized Glutaraldehyde in Acidic Environment

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.8	291	0.1M Sodium Acetate, 7% NaCl, 25% Ethylene glycol, pH 4.8, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2	38.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.856	α = 90
b = 78.856	β = 90
c = 36.954	γ = 90

Symmetry
Space Group	P 43 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	MAR CCD 165 mm	mirrors	2005-09-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-3	0.931	ESRF	ID14-3

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.56	55.73	97.7	0.036	0.036	47.2	7.5	17157	17157		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.56	1.59	87.1		0.367	0.367	2.34	3.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	FOURIER SYNTHESIS	THROUGHOUT	In-House Coordinates	1.56	55.73	17157	15912	842	97.66	0.12937	0.1266	0.1824	RANDOM	30.913

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]
-0.19			-0.19		0.37

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.618
r_sphericity_free	22.949
r_dihedral_angle_4_deg	17.14
r_scangle_it	16.243
r_scbond_it	14.344
r_sphericity_bonded	14.033
r_dihedral_angle_3_deg	13.32
r_rigid_bond_restr	9.29
r_mcangle_it	8.31
r_mcbond_it	6.628
r_dihedral_angle_1_deg	5.756
r_angle_refined_deg	1.445
r_nbtor_refined	0.307
r_symmetry_vdw_refined	0.289
r_nbd_refined	0.226
r_xyhbond_nbd_refined	0.212
r_symmetry_hbond_refined	0.162
r_chiral_restr	0.104
r_bond_refined_d	0.013
r_gen_planes_refined	0.006
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

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1097
Nucleic Acid Atoms
Solvent Atoms	123
Heterogen Atoms	40

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
REFMAC	phasing