3QNY

Monoclinic form of human IgA1 Fab fragment, sharing same Fv as IgG

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2EH7	PDB ENTRY 2EH7 (for the light chains) and 2FBJ (for the heavy chains)
experimental model	PDB	2FBJ	PDB ENTRY 2EH7 (for the light chains) and 2FBJ (for the heavy chains)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.2	293	0.2M potassium sulfate, 20% PEG 3350, pH 8.2, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 96.3	α = 90
b = 50	β = 107.5
c = 99.2	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	108	IMAGE PLATE	MAR scanner 345 mm plate		2008-08-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.5418

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	2.3	27.5	97.3	0.065	13.44		39517	39517			41.948

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.3	2.4	91.2		0.448	0.527	3.16

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 2EH7 (for the light chains) and 2FBJ (for the heavy chains)	2.3	18.75	39455	39455	1220	97.28	0.1878	0.1878	0.1868	0.2178	RANDOM	50.16

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]
6.0502		0.3168	2.4517		-8.5019

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	17.91
t_omega_torsion	3.36
t_angle_deg	1.24
t_bond_d	0.01
t_dihedral_angle_d
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_pseud_angle
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6305
Nucleic Acid Atoms
Solvent Atoms	245
Heterogen Atoms	12

Software

Software
Software Name	Purpose
XSCALE	data scaling
AMoRE	phasing
BUSTER-TNT	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
XDS	data reduction
BUSTER	refinement