4FIO

Crystal Structure of Methenyltetrahydromethanopterin Cyclohydrolase from Methanobrevibacter ruminantium

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1QLM	PDB ENTRY 1QLM

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	8.5	293	0.2 M sodium acetate, 0.1 M Tris-HCl, 30% (w/v) PEG 4000 and 3% (v/v) isopropanol, pH 8.5, VAPOR DIFFUSION, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.13	42.12

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.37	α = 120.06
b = 74.855	β = 100.01
c = 74.816	γ = 98.28

Symmetry
Space Group	P 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 QUANTUM 315r		2011-04-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	AUSTRALIAN SYNCHROTRON BEAMLINE MX2		Australian Synchrotron	MX2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.37	19.88	93.8	17.3	3.7		184543		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	1.37	1.44	79.6		0.606	0.606	2.2

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	PDB ENTRY 1QLM	1.37	19.88	175155	9299	93.7	0.132	0.13	0.175	RANDOM	18.55

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]
2.07	0.72	-1.55	-0.44	4.45	-1.63

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.407
r_sphericity_free	19.25
r_dihedral_angle_4_deg	16.144
r_dihedral_angle_3_deg	13.995
r_sphericity_bonded	10.757
r_rigid_bond_restr	8.441
r_dihedral_angle_1_deg	5.94
r_angle_refined_deg	2.297
r_chiral_restr	0.164
r_bond_refined_d	0.023
r_gen_planes_refined	0.014
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_it
r_mcbond_other
r_mcangle_it
r_scbond_it
r_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7144
Nucleic Acid Atoms
Solvent Atoms	1071
Heterogen Atoms	24

Software

Software
Software Name	Purpose
Blu-Ice	data collection
MOLREP	phasing
REFMAC	refinement
XDS	data reduction
SCALA	data scaling