4ZIQ

Crystal structure of trypsin activated alpha-2-macroglobulin from Escherichia coli.

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293.5	12-16% [w/v] PEG8,000 100mM Tris-HCl

Crystal Properties
Matthews coefficient	Solvent content
2.88	57.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 274.28	α = 90
b = 95.36	β = 104.77
c = 81.09	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 6M		2013-02-09	M	MAD
2	1	x-ray	100	PIXEL	DECTRIS PILATUS 6M		2013-11-22	M	MAD
3	1	x-ray	100	PIXEL	DECTRIS PILATUS 6M		2012-11-03	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALBA BEAMLINE XALOC	0.9724, 0.9768, 0.9788, 0.9793, 0.9791	ALBA	XALOC
2	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.9724, 0.9768, 0.9788, 0.9793, 0.9791	ESRF	ID23-1
3	SYNCHROTRON	ESRF BEAMLINE ID29	0.9724, 0.9768, 0.9788, 0.9793, 0.9791	ESRF	ID29

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	2.55	47.7	99.4	0.1	19.3	14.9	65409	65409			85.37

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	2.55	2.7	98.8		1.163	2.2	9.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SIRAS	THROUGHOUT	2.55	47.68	65374	1083	98.97	0.1903	0.1898	0.2213	RANDOM	111.06

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]
2.477		10.7971	-7.0753		4.5982

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	3.14
t_omega_torsion	2.72
t_angle_deg	1.05
t_bond_d	0.009
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	3.14
t_omega_torsion	2.72
t_angle_deg	1.05
t_bond_d	0.009
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11224
Nucleic Acid Atoms
Solvent Atoms	105
Heterogen Atoms	9

Software

Software
Software Name	Purpose
XDS	data reduction
XSCALE	data scaling
SHELXDE	phasing
Coot	model building
BUSTER	refinement

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 R01GM133198.