3N3X

Crystal Structure of the complex formed between type I ribosome inactivating protein and hexapeptide Ser-Asp-Asp-Asp-Met-Gly at 1.7 A resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1AHA

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.7	298	14% PEG6000, 0.1M Sodium Phosphate, pH 6.7, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.35	47.72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 130.241	α = 90
b = 130.241	β = 90
c = 39.974	γ = 120

Symmetry
Space Group	H 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	77	CCD	MARRESEARCH	mirror	2009-07-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM14	0.97	ESRF	BM14

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.7	40	99.2	0.038	56.9		27745	27745			25.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.7	1.76	92.8		0.28	4.9

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	1AHA	1.7	37.6	27745	26128	1384	99.17	0.2105	0.20996	0.19772	0.22165	RANDOM	28.068

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]
-1.06	-0.53		-1.06		1.59

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.747
r_dihedral_angle_4_deg	16.474
r_dihedral_angle_3_deg	14.298
r_dihedral_angle_1_deg	5.184
r_scangle_it	2.65
r_scbond_it	1.669
r_angle_refined_deg	1.195
r_mcangle_it	1.024
r_mcbond_it	0.583
r_symmetry_hbond_refined	0.526

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.747
r_dihedral_angle_4_deg	16.474
r_dihedral_angle_3_deg	14.298
r_dihedral_angle_1_deg	5.184
r_scangle_it	2.65
r_scbond_it	1.669
r_angle_refined_deg	1.195
r_mcangle_it	1.024
r_mcbond_it	0.583
r_symmetry_hbond_refined	0.526
r_nbtor_refined	0.305
r_symmetry_vdw_refined	0.272
r_nbd_refined	0.207
r_xyhbond_nbd_refined	0.113
r_chiral_restr	0.078
r_bond_refined_d	0.008
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1954
Nucleic Acid Atoms
Solvent Atoms	258
Heterogen Atoms	39

Software

Software
Software Name	Purpose
HKL-2000	data collection
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.