1R9F | pdb_00001r9f

Crystal structure of p19 complexed with 19-bp small interfering RNA

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5	293	ammonium sulfate, potassium chloride, HEPES-NaOH, dithiothreitol, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K, pH 7.50

Crystal Properties
Matthews coefficient	Solvent content
2.05	39.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.249	α = 90
b = 91.249	β = 90
c = 148.63	γ = 120

Symmetry
Space Group	H 3 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	MARRESEARCH		2003-07-18	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-ID-B	0.9791,0.9789,0.9562	APS	14-ID-B

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	1.85	50	99.1	0.06	44.8	9.5		39408		-3	21.8

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)
	1.85	1.92	93.2		0.725	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.85	14.86	36309	36309	1772	92.3	0.212	0.212	0.21	0.23	0.22	RANDOM	46.4

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]
5.46	4.19		5.46		-10.91

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	16.3
c_scangle_it	3.15
c_mcangle_it	2.21
c_scbond_it	2.11
c_mcbond_it	1.42
c_improper_angle_d	1.02
c_angle_deg	0.9
c_bond_d	0.004
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	972
Nucleic Acid Atoms	810
Solvent Atoms	70
Heterogen Atoms	10

Software

Software
Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
CNS	phasing