Experiment: 1JQE

Crystal Structure Analysis of Human Histamine Methyltransferase (Ile105 Polymorphic Variant) Complexed with AdoHcy and Antimalarial Drug Quinacrine

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		Partially refined 3.3A SeMet HNMT/AdoMet/Histamine structure solved by MAD phasing (crystal grown at pH 7.5).

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.2	289	PEG 8000, sodium phosphate, citric acid, sodium chloride, pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.32	46.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 130.34	α = 90
b = 130.34	β = 90
c = 63.01	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	100	CCD	CUSTOM-MADE		2000-05-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12C	1.1000	NSLS	X12C

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	1.91	25	94.2	0.033	38.1	4.5	214586	202140		-3	19.5

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)
	1.91	1.94	43.8		0.213	3		1036

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 (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	Partially refined 3.3A SeMet HNMT/AdoMet/Histamine structure solved by MAD phasing (crystal grown at pH 7.5).	1.91	25	43822	43822	4412	92.1	0.21	0.199	0.195	0.235	RANDOM	34.1

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]
0.61	0.98		0.61		-1.23

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.6
c_mcbond_it	1.89
c_angle_deg	1.4
c_improper_angle_d	0.79
c_bond_d	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4225
Nucleic Acid Atoms
Solvent Atoms	377
Heterogen Atoms	87

Software

Software
Software Name	Purpose
CNS	refinement
MAR345	data collection
SCALEPACK	data scaling
CNS	phasing