Experiment: 2VHB

AZIDE ADDUCT OF THE BACTERIAL HEMOGLOBIN FROM VITREOSCILLA STERCORARIA

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.4		PRECIPITANT: AMMONIUM SULFATE 1.2 M. BUFFER: PYROPHOSPHATE 0.2 M PH 6.4. ADDITIVES: ETHYLENE GLYCOL 3% V/V. PROTEIN CONCENTRATION 25 MG/ML. VAPOR DIFFUSION TECHNIQUES. AZIDE SOAKING CONDITIONS: 0.03 M N3-, 1 HOUR, PH 7.0, vapor diffusion

Crystal Properties
Matthews coefficient	Solvent content
2.3	52

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.72	α = 90
b = 40.19	β = 106.55
c = 62.94	γ = 90

Symmetry
Space Group	P 1 21 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	IMAGE PLATE AREA DETECTOR	MAR RESEARCH 180MM IMAGE PLATE		1996-10-16	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

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	1.76	15	94	0.049	0.049	22	2.5		29076		1

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)
	1.76	1.83	94.1		0.275	0.049	2	2.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	1.76	15	29629		92	0.197	0.1874

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]

RMS Deviations
Key	Refinement Restraint Deviation
t_dihedral_angle_d	14.254
t_it	4.932
t_angle_deg	1.987
t_nbd	0.054
t_gen_planes	0.02
t_trig_c_planes	0.019
t_bond_d	0.013
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2077
Nucleic Acid Atoms
Solvent Atoms	184
Heterogen Atoms	92

Software

Software
Software Name	Purpose
TNT	refinement
DENZO	data reduction
SCALEPACK	data scaling
TNT	phasing