1K49 | pdb_00001k49

Crystal Structure of 3,4-dihydroxy-2-butanone 4-phosphate synthase (cation free form)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1G57	E. coli enzyme structure (1G57)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	295	Li2SO4, MES-NaOH, PEG5000 Monomethyl ether, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.07	40.54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.697	α = 90
b = 87.826	β = 90
c = 43.958	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	x-ray	105	IMAGE PLATE	RIGAKU RAXIS IV	MSC focusing mirror	1998-04-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.54

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	1.5	30	88.6	0.042	26.7	3.65	30209	30209		-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)
1	1.5	1.53	36		0.27	3.5	1.2	603

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	E. coli enzyme structure (1G57)	1.5	30	2	30209	30209	3000		0.201	0.258

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
t_angle_deg	2.4
t_bond_d	0.015

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1566
Nucleic Acid Atoms
Solvent Atoms	224
Heterogen Atoms	20

Software

Software
Software Name	Purpose
AMoRE	phasing
TNT	refinement
DENZO	data reduction
SCALEPACK	data scaling