1VQ1

Crystal structure of N5-glutamine methyltransferase, HemK(EC 2.1.1.-) (TM0488) from Thermotoga maritima at 2.80 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION,SITTING DROP,NANODROP	7.5	293	5.0% MPD, 10.0% PEG-6000, 0.1M HEPES pH 7.5, VAPOR DIFFUSION,SITTING DROP,NANODROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.85	56.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 140.973	α = 90
b = 58.611	β = 109.46
c = 85.667	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	ADSC		2003-12-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1		ALS	8.2.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.8	36.09	96	0.064	13.3	3.4		15828			74.56

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.8	2.87	73.3		0.463	1.7	2.4	884

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1nv8	2.8	36.09	15024	801	95.94	0.21156	0.20824	0.27281	RANDOM	85.35

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]
5.5		-1.54	-7.5		0.98

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.817
r_dihedral_angle_3_deg	17.375
r_dihedral_angle_4_deg	16.09
r_dihedral_angle_1_deg	7.197
r_scangle_it	4.495
r_scbond_it	3.285
r_angle_refined_deg	1.507
r_mcangle_it	1.394
r_mcbond_it	0.995
r_angle_other_deg	0.78
r_mcbond_other	0.383
r_symmetry_hbond_refined	0.352
r_symmetry_vdw_refined	0.232
r_nbd_refined	0.23
r_symmetry_vdw_other	0.22
r_nbd_other	0.194
r_nbtor_refined	0.193
r_xyhbond_nbd_refined	0.183
r_nbtor_other	0.089
r_chiral_restr	0.071
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4116
Nucleic Acid Atoms
Solvent Atoms	7
Heterogen Atoms	54

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
CCP4	data scaling