Experiment: 3FDC

Crystal Structure of Avidin

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.6	296	25% PEG 3000, 100 mM sodium acetate, pH 4.6, VAPOR DIFFUSION, SITTING DROP, temperature 296.0K

Crystal Properties
Matthews coefficient	Solvent content
2.38	48.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.2	α = 90
b = 74.2	β = 90
c = 85.82	γ = 120

Symmetry
Space Group	P 32 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	100	CCD	MARMOSAIC 225 mm CCD		2006-03-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 5ID-B	1.279	APS	5ID-B

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	3.1	30	99.9	0.099	0.095	28	12.3		5233

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		PDB ENTRY 1LDO	3.1	30	5233		99.9	0.255	0.33	0.2851	RANDOM	64.302

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1848
Nucleic Acid Atoms
Solvent Atoms	14
Heterogen Atoms	61

Software

Software
Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
PHASER	phasing