4DCQ

Crystal Structure of the Fab Fragment of 3B5H10, an Antibody-Specific for Extended Polyglutamine Repeats (orthorhombic form)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3S96

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.5	298	20% PEG 3350, 200 mM citric acid,0.7% ethylene glycol, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.12	42

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.068	α = 90
b = 121.815	β = 90
c = 42.012	γ = 90

Symmetry
Space Group	P 21 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	78	CCD	ADSC QUANTUM 315		2006-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	1.0	ALS	8.3.1

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	1.94	30	96.4	0.084	0.071	7.6	5.2	32012	29497	2	2	19.5

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	1.94	1.99	74.26		0.36	0.27	2.9	2.2	1525

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	3S96	1.94	11	29209	29209	1461	96.39	0.1883	0.1883	0.1852	0.246	RANDOM	25.4097

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]
-0.68			-0.37		1.05

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.413
r_dihedral_angle_4_deg	22.798
r_dihedral_angle_3_deg	17.15
r_dihedral_angle_1_deg	9.296
r_scangle_it	4.917
r_scbond_it	3.239
r_mcangle_it	2.24
r_angle_refined_deg	1.786
r_mcbond_it	1.301
r_chiral_restr	0.146

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.413
r_dihedral_angle_4_deg	22.798
r_dihedral_angle_3_deg	17.15
r_dihedral_angle_1_deg	9.296
r_scangle_it	4.917
r_scbond_it	3.239
r_mcangle_it	2.24
r_angle_refined_deg	1.786
r_mcbond_it	1.301
r_chiral_restr	0.146
r_bond_refined_d	0.018
r_gen_planes_refined	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3316
Nucleic Acid Atoms
Solvent Atoms	365
Heterogen Atoms	8

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.