1AVN

HUMAN CARBONIC ANHYDRASE II COMPLEXED WITH THE HISTAMINE ACTIVATOR

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.7		HCA II CRYSTALLIZED FROM 2.3 M AMMONIUM SULFATE, 50MM TRIS-HCL, 3MM SODIUM AZIDE, PH 7.7

Crystal Properties
Matthews coefficient	Solvent content
2.15	42.68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.61	α = 90
b = 41.69	β = 104.24
c = 72.78	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	293	AREA DETECTOR	SIEMENS		1996-11-19	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	MACSCIENCE M18X

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	2	30.9	81	0.076	0.09	33.61	3.4		14777

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)
	2	2.25	73		0.064	0.174	10.7	2.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	2	15	14464	14464		80.6	0.154		14.9

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
p_transverse_tor	29.5
p_staggered_tor	17.9
p_planar_tor	6.3
p_xyhbond_nbd	0.211
p_multtor_nbd	0.183
p_singtor_nbd	0.177
p_chiral_restr	0.174
p_planar_d	0.08
p_angle_d	0.056
p_bond_d	0.018
p_angle_deg
p_hb_or_metal_coord
p_mcbond_it
p_mcangle_it
p_scbond_it
p_scangle_it
p_plane_restr
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2039
Nucleic Acid Atoms
Solvent Atoms	177
Heterogen Atoms	4

Software

Software
Software Name	Purpose
CCP4	model building
CCP4	refinement
XENGEN	data reduction
XENGEN	data scaling
CCP4	phasing