2AT0

1.00 A Crystal Structure Of L133V Mutant of Nitrophorin 4 From Rhodnius Prolixus Complexed With Nitric Oxide at pH 5.6

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	300	ammonium phosphate, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 300.0K

Crystal Properties
Matthews coefficient	Solvent content
1.62	23.63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.286	α = 90
b = 42.699	β = 94.27
c = 52.97	γ = 90

Symmetry
Space Group	C 1 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 325 mm CCD		2005-07-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.98	SSRL	BL9-2

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	1	36.51	99.8	0.076	0.076	13.9	4.1		83901			9.3

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	1.05	98	98.7	0.178	0.178	5.3	3.4	12069

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	FOURIER SYNTHESIS	FREE R	pdb entry 1X8O	1	36.47	83900	83900	4242	99.39	0.14	0.14	0.139	0.154	RANDOM	12.753

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]
0.11		-0.13	-0.18		0.05

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.905
r_dihedral_angle_4_deg	13.788
r_dihedral_angle_3_deg	11.286
r_dihedral_angle_1_deg	7.158
r_sphericity_free	4.272
r_sphericity_bonded	3.542
r_scangle_it	2.953
r_scbond_it	2.252
r_mcangle_it	1.864
r_angle_refined_deg	1.489
r_mcbond_it	1.278
r_rigid_bond_restr	1.153
r_nbtor_refined	0.303
r_metal_ion_refined	0.302
r_nbd_refined	0.27
r_symmetry_vdw_refined	0.203
r_xyhbond_nbd_refined	0.185
r_chiral_restr	0.1
r_symmetry_hbond_refined	0.08
r_bond_refined_d	0.011
r_gen_planes_refined	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1689
Nucleic Acid Atoms
Solvent Atoms	287
Heterogen Atoms	179

Software

Software
Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
MOSFLM	data reduction
CCP4	data scaling