Experiment: 4B53

Crystal structure of the isolated IgG4 CH3 domain

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		291	SITTING DROP AT 291K. RESERVOIR OF 100 MICROLITRE 22% PEG 3350 AND 150MM CALCIUM ACETATE. DROP SIZE 100 NANOLITRE PROTEIN AND 100 NANOLITRE RESERVOIR. PROTEIN CONCENTRATION OF 1.5MG/ML

Crystal Properties
Matthews coefficient	Solvent content
2.34	47.38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.09	α = 90
b = 57.09	β = 90
c = 138.436	γ = 90

Symmetry
Space Group	P 43 2 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		2010-03-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04		Diamond	I04

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	1.8	27.96	99.9	0.08	25.8	27.1		22102			24.8

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	1.8	1.85	99.9		0.76	4.7	26.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1ADQ	1.8	27.957	1.34	21991	1099	99.68	0.1851	0.1826	0.2368	0.224

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]
6.9156			6.9156		-8.1011

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	15.933
f_angle_d	1.083
f_chiral_restr	0.074
f_bond_d	0.006
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1640
Nucleic Acid Atoms
Solvent Atoms	195
Heterogen Atoms	59

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
SCALA	data scaling
MOLREP	phasing