3MQW

Crystal structure of a putative endoribonuclease L-PSP from Entamoeba histolytica with higher solvent content and an ordered N-terminal tag

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3M4S	PDB entry 3M4S

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5	290	JCSG+ SCREEN CONDITION F2: 100MM CITRATE, 3150 MM AMMONIUM SULFATE, ENHIA.00579.A AT 26 MG/ML IN THE PRESENCE OF 2 MM SODIUM ORTHOVANADATE, pH 5.0, VAPOR DIFFUSION, SITTING DROP, temperature 290K

Crystal Properties
Matthews coefficient	Solvent content
2.36	47.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84	α = 90
b = 99.72	β = 90
c = 106.1	γ = 90

Symmetry
Space Group	P 21 21 21

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		2010-04-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1		SSRL	BL7-1

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	1.8	19.86	98.6	0.074	14.29	4.1	83127	81926		-3	23.34

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)
	1.8	1.85	90.9		0.424	2.7	3.2	6076

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 3M4S	1.8	19.86	83127	81664	4096		0.148	0.148	0.147	0.183	RANDOM	17.63

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]
-0.74			-0.04		0.78

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.315
r_dihedral_angle_4_deg	11.943
r_dihedral_angle_3_deg	11.919
r_dihedral_angle_1_deg	5.661
r_scangle_it	4.551
r_scbond_it	2.777
r_angle_refined_deg	1.518
r_mcangle_it	1.463
r_mcbond_it	0.864
r_chiral_restr	0.121
r_bond_refined_d	0.019
r_gen_planes_refined	0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5907
Nucleic Acid Atoms
Solvent Atoms	766
Heterogen Atoms	136

Software

Software
Software Name	Purpose
Blu-Ice	data collection
PHASER	phasing
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling