2IMD

Structure of SeMet 2-hydroxychromene-2-carboxylate isomerase (HCCA isomerase)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	microbatch under oil	6.1	294	crystallization solution: 1.2M sodium dihydrogen phosphate, 0.8M potassium hydrogen phosphate,0.2M lithium sulfate, 0.1M CAPS pH 6.1. Protein and crystallization solutions were mixed 1:1., microbatch under oil, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.75

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.336	α = 90
b = 76.051	β = 90
c = 38.366	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	100	IMAGE PLATE	RIGAKU RAXIS IV++	BLUE MAX-FLUX CONFOCAL	2004-07-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.5418

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	27	99.4	0.044		3.83	34098	34098

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	1.55			0.291	2.2	2.27	6066

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD plus SIR	THROUGHOUT	1.6	20	26752	1488	99.94	0.18887	0.18679	0.22562	RANDOM	22.331

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]
-0.95			-0.79		1.74

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.554
r_dihedral_angle_4_deg	20.274
r_dihedral_angle_3_deg	14.693
r_dihedral_angle_1_deg	4.751
r_scangle_it	4.035
r_scbond_it	2.694
r_angle_refined_deg	1.901
r_mcangle_it	1.846
r_mcbond_it	1.237
r_nbtor_refined	0.318
r_chiral_restr	0.29
r_symmetry_vdw_refined	0.242
r_nbd_refined	0.225
r_xyhbond_nbd_refined	0.175
r_symmetry_hbond_refined	0.168
r_bond_refined_d	0.02
r_gen_planes_refined	0.01
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1630
Nucleic Acid Atoms
Solvent Atoms	215
Heterogen Atoms	72

Software

Software
Software Name	Purpose
REFMAC	refinement
CrystalClear	data collection
d*TREK	data reduction
d*TREK	data scaling
SOLVE	phasing