2A5B

Avidin complexed with 8-oxodeoxyguanosine

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	290	PEG 8000, Sodium Citrate, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 290.0K

Crystal Properties
Matthews coefficient	Solvent content
2.1	40.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.019	α = 90
b = 79.487	β = 90
c = 42.909	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	100	CCD	ADSC QUANTUM 4		2004-05-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2	0.9795	SRS	PX14.2

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	2.49	52.7		0.076	0.076	23.5	6.6	8683	8270	2	2

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	2.49	2.59	96.3		0.42	0.41	3.1	6.2

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1IJ8	2.49	52.7	8683	8270	413	98.49	0.22331	0.21905	0.31007	RANDOM	35.168

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]
1.9			-1.56		-0.34

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.901
r_dihedral_angle_4_deg	20.315
r_dihedral_angle_3_deg	19.048
r_dihedral_angle_1_deg	7.755
r_scangle_it	3.943
r_scbond_it	2.462
r_mcangle_it	2.07
r_angle_refined_deg	1.994
r_mcbond_it	1.21
r_nbtor_refined	0.317
r_nbd_refined	0.227
r_symmetry_vdw_refined	0.222
r_xyhbond_nbd_refined	0.161
r_chiral_restr	0.124
r_symmetry_hbond_refined	0.035
r_bond_refined_d	0.019
r_gen_planes_refined	0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1948
Nucleic Acid Atoms
Solvent Atoms	44
Heterogen Atoms	48

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
SCALEPACK	data scaling
AMoRE	phasing