Experiment: 1TIJ

3D Domain-swapped human cystatin C with amyloid-like intermolecular beta-sheets

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1G96	ONE HALF OF HUMAN CYSTATIN C CRYSTALLOGRAPHIC DIMER WITH SWAPPED DOMAINS (PDB ENTRY 1G96)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.8	277	100mM sodium acetate, 20mM CaCl2, 40-45% MPD, pH 4.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
5.6	77.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.49	α = 90
b = 91.49	β = 90
c = 144.45	γ = 90

Symmetry
Space Group	P 41 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	120	IMAGE PLATE	MARRESEARCH	mirrors	1996-12-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7A	0.8885	EMBL/DESY, HAMBURG	BW7A

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	3.03	40	97.8	0.123	14	7.4	12273	12273		-3	57.9

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)
	3.03	3.08	97.7		0.409	3.2	5.4	599

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	ONE HALF OF HUMAN CYSTATIN C CRYSTALLOGRAPHIC DIMER WITH SWAPPED DOMAINS (PDB ENTRY 1G96)	3.03	15	11902	11902	1070	96.2	0.223	0.217	0.217	0.2179	0.262	0.2601	RANDOM	42.4

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]
4.32			4.32		-8.65

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	25.9
c_angle_deg	2
c_improper_angle_d	1.2
c_bond_d	0.016

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1776
Nucleic Acid Atoms
Solvent Atoms	22
Heterogen Atoms

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing