2C4B

Inhibitor cystine knot protein McoEeTI fused to the catalytically inactive barnase mutant H102A

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1A2P	PDB ENTRY 1A2P

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		277	1.3 M AMMONIUM SULPHATE, 7% PEG400 (V/V), 0.1 M MES PH 6.5 AS RESERVOIR SOLUTION. DROPLETS MIXED FROM 8 UL PROTEIN (30 MG/ML) AND 4 UL RESERVOIR. SITTING DROP VAPOR DIFFUSION. 4 DEG. C.

Crystal Properties
Matthews coefficient	Solvent content
3.8	67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.02	α = 90
b = 217.71	β = 90
c = 58.34	γ = 90

Symmetry
Space Group	C 2 2 21

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	MARRESEARCH		2004-05-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MPG/DESY, HAMBURG BEAMLINE BW6		MPG/DESY, HAMBURG	BW6

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	1.3	39.8	98.7	0.04	14	3.1		114401		-3	19.5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.3	1.4	98.1		0.42	2.42	2.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1A2P	1.3	39.84	112108	2291	100	0.133	0.132	0.15	0.164	0.18	RANDOM	17.55

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]
0.93			-0.6		-0.32

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.631
r_dihedral_angle_4_deg	18.483
r_scangle_it	12.789
r_dihedral_angle_3_deg	11.118
r_scbond_it	10.018
r_dihedral_angle_1_deg	6.646
r_mcangle_it	5.214
r_mcbond_it	4.582
r_angle_refined_deg	2.319
r_angle_other_deg	1.657
r_chiral_restr	0.348
r_symmetry_vdw_other	0.29
r_symmetry_vdw_refined	0.285
r_nbd_other	0.224
r_nbd_refined	0.223
r_nbtor_refined	0.188
r_xyhbond_nbd_refined	0.182
r_symmetry_hbond_refined	0.159
r_nbtor_other	0.096
r_bond_refined_d	0.021
r_gen_planes_refined	0.007
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2188
Nucleic Acid Atoms
Solvent Atoms	509
Heterogen Atoms	218

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
EPMR	phasing