1NXT

MicArec pH 4.0

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4	293	40%v/v PEG 300, 100mM Phosphate Citrate, pH 4.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.54	51.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 79.673	α = 90
b = 92.829	β = 90
c = 36.789	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		2002-09-29	M	SAD using Sulphur and Xenon

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 5.2R	1.8	ELETTRA	5.2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.34	30.86	98.96	0.052	11.6			5398	2	2	39.55

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.342	2.402	97.3		0.116	5.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	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	SAD Xenon/Sulphur	THROUGHOUT	2.34	30.86	2	2	5398	579	98.96	0.21614	0.2141	0.23556	RANDOM	39.556

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]
2.61			-1.28		-1.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.476
r_scangle_it	5.368
r_angle_other_deg	3.788
r_scbond_it	2.928
r_mcangle_it	1.972
r_angle_refined_deg	1.838
r_mcbond_it	1.058
r_xyhbond_nbd_refined	0.331
r_symmetry_vdw_other	0.303
r_nbd_other	0.279
r_symmetry_hbond_refined	0.235
r_nbd_refined	0.222
r_symmetry_vdw_refined	0.216
r_chiral_restr	0.112
r_nbtor_other	0.11
r_bond_refined_d	0.022
r_gen_planes_other	0.013
r_gen_planes_refined	0.011
r_bond_other_d

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	922
Nucleic Acid Atoms
Solvent Atoms	30
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
SHARP	phasing