Experiment: 1K6Q

Crystal structure of antibody Fab fragment D3

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
other		humanised Fab D3h44

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	3.6	293	lithium sulphate, sodium acetate, pH 3.6, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.66

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84.17	α = 90
b = 77.48	β = 114.75
c = 75.19	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	IMAGE PLATE	MARRESEARCH	mirrors	1998-12-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7B	0.8350	EMBL/DESY, HAMBURG	BW7B

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	2.39	40	94.4	0.077	11.7	3.4	16837	16837			40.9

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)
	2.39	2.58	84.5		0.239	4.4	3.5	3144

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-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	humanised Fab D3h44	2.4	19.6	16820	16820	1214	97.6	0.225	0.2249	0.298	0.3	RANDOM	51.4

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]
6.54		-8.02	-1.46		-5.51

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_deg	1.68
c_bond_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3200
Nucleic Acid Atoms
Solvent Atoms	175
Heterogen Atoms

Software

Software
Software Name	Purpose
MAR345	data collection
XDS	data reduction
AMoRE	phasing
CNS	refinement
XDS	data scaling