2YPN

Hydroxymethylbilane synthase

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1AH5	PDB ENTRY 1AH5

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.3		PROTEIN WAS CRYSTALLISED AT PH 5.3 IN ITTING DROPS OF 0.05ML WITH 6-7MG/ML OF PROTEIN, 0.3MM EDTA, 15MM DITHIOTHREITOL, 10%(W/V) PEG6000 AND 0.01% NAN3 IN 0.1M NAAC.

Crystal Properties
Matthews coefficient	Solvent content
2.48	50

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 88.06	α = 90
b = 75.73	β = 90
c = 50.35	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	neutron	293	CCD			1995-11-15	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID09	0.4,1.6	ESRF	ID09

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	2.3	18.5	89.8	0.102	5.9	11		13949

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	2.3	2.39	89.6		0.258	2.4	8

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1AH5	2.3	18.5	13949	1416	89.8	0.194	0.269	RANDOM	21.9

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
x_dihedral_angle_d	22.93
x_angle_deg	1.574
x_improper_angle_d	1.29
x_bond_d	0.007
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2228
Nucleic Acid Atoms
Solvent Atoms	150
Heterogen Atoms	30

Software

Software
Software Name	Purpose
DARESBURY	data collection
LAUENORM/AGROVATA	data reduction
X-PLOR	model building
O	model building
X-PLOR	refinement
DARESBURY	data reduction
LAUENORM	data scaling
CCP4	data scaling
X-PLOR	phasing