2AOX

Histamine Methyltransferase (Primary Variant T105) Complexed with the Acetylcholinesterase Inhibitor and Altzheimer's Disease Drug Tacrine

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1JQD	pdb entry 1JQD

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2	289	PEG 6000, MES, ethyleneglycol, pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.54	51.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 132.34	α = 90
b = 132.34	β = 90
c = 64.58	γ = 120

Symmetry
Space Group	P 6

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	173	CCD	ADSC QUANTUM 4		2000-03-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X26C	1.1	NSLS	X26C

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	3.12	25	99.5	0.107	10.7	5	11570	11570		-3

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)
	3.12	3.19	100		0.273			750

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	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1JQD	3.12	25	11570	11570	505		0.235	0.235	0.229	0.285	RANDOM 5%	14.4

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]
-1.91	1.61		-1.91		3.82

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.9
c_angle_deg	1.3
c_improper_angle_d	0.8
c_bond_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4472
Nucleic Acid Atoms
Solvent Atoms	9
Heterogen Atoms	30

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
GLRF	phasing
CNS	refinement

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.