Experiment: 4AA9

Camel chymosin at 1.6A resolution

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.5		RESERVOIR: 2 M (NH4)2SO4, 100 MM BIS-TRIS, PH 5.5. SAMPLE: 30 MG/ML PROTEIN IN 50 MM BIS-TRIS, PH 6.0.

Crystal Properties
Matthews coefficient	Solvent content
3	58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.31	α = 90
b = 66.11	β = 90
c = 133.74	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	MARRESEARCH MAR165	MULTILAYER MIRROR, CURVED TO FOCUS IN THE VERTICAL (R 400 M).	2011-12-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I911-2		MAX II	I911-2

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	1.6	30	99	0.04	31	8.6		62765		15	19.66

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	1.6	1.7	23		0.14	6	9.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1CMS	1.6	24.795	2	62748	3182	99.32	0.1874	0.1862	0.18	0.2084	0.2034

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]
2.5168			1.1275		-3.6443

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.984
f_angle_d	1.061
f_chiral_restr	0.075
f_bond_d	0.007
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2438
Nucleic Acid Atoms
Solvent Atoms	442
Heterogen Atoms	70

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHENIX	phasing