3NDB

Crystal structure of a signal sequence bound to the signal recognition particle

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	EVAPORATION	5.6	291	30% MPD, 200 mM NH4PO4 (pH 5.6), EVAPORATION, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.32	62.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 108.835	α = 90
b = 126.275	β = 90
c = 201.758	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 315r		2009-02-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	1.0	ESRF	ID23-1

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	3	63.8	98.5	0.102	0.091		4.8		27778	3	9.2	14.1

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	PDB ENTRY 2V3C	3	20	27778	26284	1385	98.37	0.23003	0.23003	0.22799	0.26652	RANDOM	99.513

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]
-2.78			7.16		-4.38

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.849
r_dihedral_angle_3_deg	25.243
r_dihedral_angle_4_deg	19.98
r_dihedral_angle_1_deg	7.416
r_scangle_it	2.392
r_angle_refined_deg	2.068
r_scbond_it	1.467
r_mcangle_it	1.325
r_mcbond_it	0.682
r_chiral_restr	0.104
r_bond_refined_d	0.014
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4000
Nucleic Acid Atoms	2921
Solvent Atoms
Heterogen Atoms	5

Software

Software
Software Name	Purpose
ADSC	data collection
MOLREP	phasing
REFMAC	refinement
SCALA	data scaling