4HRS

Crystal structure of H. volcanii small archaeal modifier protein 2

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.8	277.15	100 mM bis-tris-propane-HCl (pH 6.8), 25-30% (w/v) PEG 400, 0.2 M MgCl2, 0.1 M KCl, VAPOR DIFFUSION, HANGING DROP, temperature 277.15K

Crystal Properties
Matthews coefficient	Solvent content
2.88	57.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 24.605	α = 90
b = 64.603	β = 90
c = 104.555	γ = 90

Symmetry
Space Group	I 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	ADSC QUANTUM 315	mirrors	2010-09-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X29A	1.075	NSLS	X29A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	2.01	54.96	95.7	0.062	0.062	43.4	12.6	5845	5594	2	2	40

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.01	2.04	97.2		0.293	0.293	6.3	12.4	239

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	CS-Rosetta model	2.3	54.96	3825	3771	186	99.02	0.255	0.21682	0.21488	0.25365	RANDOM	36.593

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]
-24.18			41.49		-17.31

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.305
r_dihedral_angle_3_deg	16.464
r_dihedral_angle_4_deg	16.362
r_scangle_it	8.058
r_dihedral_angle_1_deg	5.874
r_scbond_it	4.884
r_mcangle_it	3.157
r_mcbond_it	1.588
r_angle_refined_deg	1.214
r_angle_other_deg	0.848
r_mcbond_other	0.273
r_chiral_restr	0.066
r_bond_refined_d	0.01
r_gen_planes_refined	0.003
r_bond_other_d	0.002
r_gen_planes_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	482
Nucleic Acid Atoms
Solvent Atoms	34
Heterogen Atoms

Software

Software
Software Name	Purpose
ADSC	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling