2R1W

Crystal structure of S25-2 Fab in complex with Kdo analogues

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1Q9Q

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	8		PEG 4000, ethelyene glycol, pH 8.0, VAPOR DIFFUSION

Crystal Properties
Matthews coefficient	Solvent content
2.53	51.39

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.68	α = 90
b = 81.2	β = 90
c = 131.95	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		IMAGE PLATE	RIGAKU RAXIS IV++		2006-01-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-002	1.54

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	1.7	19.91	94.6	0.05	11.8	3.42		51889

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)
	1.7	1.76	95.4		0.295	3.3	3.03	5161

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	1Q9Q	1.7	20	51873	2650	94.61	0.221	0.219	0.246	RANDOM	24.495

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]
1.5			-0.48		-1.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.704
r_dihedral_angle_4_deg	17.428
r_dihedral_angle_3_deg	13.65
r_dihedral_angle_1_deg	6.671
r_scangle_it	3.252
r_scbond_it	2.31
r_angle_refined_deg	1.556
r_mcangle_it	1.425
r_mcbond_it	0.876
r_symmetry_metal_ion_refined	0.338
r_nbtor_refined	0.299
r_symmetry_vdw_refined	0.253
r_nbd_refined	0.213
r_symmetry_hbond_refined	0.168
r_xyhbond_nbd_refined	0.135
r_chiral_restr	0.107
r_metal_ion_refined	0.082
r_bond_refined_d	0.014
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3357
Nucleic Acid Atoms
Solvent Atoms	300
Heterogen Atoms	37

Software

Software
Software Name	Purpose
d*TREK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
d*TREK	data reduction