6I6Z

Crystal structure of the human CARBOXYPEPTIDASE A1 in complex with the PHOSPHINIC INHIBITOR Acetyl-Tyr-Ala-Y(PO2CH2)-homoPhe-OH

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	283	1:1 (v:v) of hCPA1/8 complex at 16.1 mg/mL and a reservoir solution of 20% w/v PEG3350, 0.2 M MgCl 2 , 0.1 M HEPES, pH 6.0.

Crystal Properties
Matthews coefficient	Solvent content
2.19	43.78

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.121	α = 90
b = 84.109	β = 90
c = 158.195	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	173	PIXEL	DECTRIS PILATUS3 6M		2013-06-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALBA BEAMLINE XALOC	0.9794	ALBA	XALOC

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	1.72	40.451	99.94	0.099	1.33	7.4		66309

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	1.72	1.7446			0.429

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3KGQ	1.72	40.44	1.33	66309	3363	99.94	0.1595	0.1582	0.1833

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	15.395
f_angle_d	1.145
f_chiral_restr	0.051
f_bond_d	0.007
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4935
Nucleic Acid Atoms
Solvent Atoms	359
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
MOLREP	phasing
SCALA	data scaling
XDS	data reduction

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.