1PFF

Crystal Structure of Homocysteine alpha-, gamma-lyase at 1.8 Angstroms

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5		100 mM HEPES/NaOH (ph 7.5), 100 mM MgCl2, 15% w/v MPEG 2000, VAPOR DIFFUSION, HANGING DROP

Crystal Properties
Matthews coefficient	Solvent content
1.99	38.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 166.634	α = 90
b = 48.476	β = 110.33
c = 75.606	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						M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1		SSRL	BL7-1

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	2.5	32.5					19864

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1E5F	2.5	32.5	1.86	19864	1035	97.8	0.1792	0.17975	0.17914	0.20837	RANDOM	20.266

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]
-0.68		-0.96	0.64		-0.62

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	7.341
r_scangle_it	2.882
r_scbond_it	1.68
r_angle_refined_deg	1.139
r_mcangle_it	1.079
r_mcbond_it	0.564
r_nbd_refined	0.218
r_symmetry_vdw_refined	0.211
r_symmetry_hbond_refined	0.207
r_xyhbond_nbd_refined	0.123
r_chiral_restr	0.083
r_bond_refined_d	0.009
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5040
Nucleic Acid Atoms
Solvent Atoms	360
Heterogen Atoms	84

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
AMoRE	phasing