1A7A

STRUCTURE OF HUMAN PLACENTAL S-ADENOSYLHOMOCYSTEINE HYDROLASE: DETERMINATION OF A 30 SELENIUM ATOM SUBSTRUCTURE FROM DATA AT A SINGLE WAVELENGTH

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.6		pH 5.6

Crystal Properties
Matthews coefficient	Solvent content
2.74	55.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.93	α = 90
b = 168.02	β = 90
c = 137.77	γ = 90

Symmetry
Space Group	C 2 2 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	CCD	BRANDEIS		1997-07-25	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12C		NSLS	X12C

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	2.8	50	99.5	0.074	11.5	6.9		50613			28

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.8	2.9	99.5

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	SAS	THROUGHOUT	2.8	20	49460	4804	97.5	0.227	0.227	0.247	RANDOM	21.8

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]
-21.44			13.55		7.89

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21
c_scangle_it	1.99
c_angle_deg	1.7
c_mcangle_it	1.5
c_scbond_it	1.31
c_improper_angle_d	1.13
c_mcbond_it	0.89
c_bond_d	0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6666
Nucleic Acid Atoms
Solvent Atoms	46
Heterogen Atoms	122

Software

Software
Software Name	Purpose
SHAKE-N-BAKE	model building
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHAKE-N-BAKE	phasing