2A9N

A Mutation Designed to Alter Crystal Packing Permits Structural Analysis of a Tight-binding Fluorescein-scFv complex

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2A9M	PDB Entry: 2A9M

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.1	298	29-30% (w/v) PEG 8000, 0.2 M ammonium sulfate, 10 mM sodium acetate , pH 4.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 81.382	α = 90
b = 100.46	β = 90
c = 61.749	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	298	IMAGE PLATE	MARRESEARCH	osmics mirror	2001-10-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	18	97.5			10306	10306

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3	3.13	96.4

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: 2A9M	3	18	9264	9264	905	96.4	0.22094	0.22094	0.21651	0.26607	RANDOM	33.491

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]
4.66			-1.41		-3.26

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.088
r_angle_refined_deg	1.26
r_scangle_it	1.047
r_angle_other_deg	0.813
r_scbond_it	0.64
r_mcangle_it	0.424
r_nbd_other	0.228
r_mcbond_it	0.225
r_nbd_refined	0.201
r_symmetry_vdw_refined	0.184
r_xyhbond_nbd_refined	0.176
r_symmetry_hbond_refined	0.154
r_symmetry_vdw_other	0.139
r_nbtor_other	0.083
r_chiral_restr	0.075
r_bond_refined_d	0.011
r_gen_planes_refined	0.004
r_bond_other_d	0.002
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3530
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	60

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
CCP4	data scaling
AMoRE	phasing