Experiment: 3DLV

Structures of SRP54 and SRP19, the two proteins assembling the ribonucleic core of the Signal Recognition Particle from the archaeon Pyrococcus furiosus.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3DUL	PDB ENTRY 3DUL

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5	293	1.2-1.3M Na Malonate, 100 mM NaAcetate, pH 5.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.76	30.12

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 35.316	α = 90
b = 116.052	β = 90
c = 84.46	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	80	CCD	ADSC QUANTUM 210		2006-05-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	0.97949	ALS	8.3.1

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	1.87	50	100	0.052	0.052	22.3	7.9	14745	14745	1	1	15

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)
	1.87	1.94	98.3		0.513	0.513	2	6.2	1411

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 (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3DUL	1.87	47.8	0.85	13987	1399	94.7	0.205	0.199	0.258	0.2525	10% OF THE NUMBER OF TOTAL REFLECTIONS	22

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]
2.0313			1.5372		-3.5685

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.765
f_angle_d	0.812
f_chiral_restr	0.054
f_bond_d	0.004
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1525
Nucleic Acid Atoms
Solvent Atoms	89
Heterogen Atoms

Software

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