Experiment: 4Q6S

CFTR Associated Ligand (CAL) PDZ bound to biotinylated peptide BT-L-iCAL36

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4E34	PDB ID 4E34 without peptide

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.95	291	16% (w/v) polyethylene glycol (PEG), 0.15 M sodium chloride, 0.01 M Tris HCl pH 7.95, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
1.96	37.09

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.599	α = 90
b = 48.167	β = 90
c = 101.166	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	ADSC QUANTUM 270		2010-08-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X6A	0.9181	NSLS	X6A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.45	19.732	99.5	0.055	0.074	24.86	13.9	32531	32353	2	8.27

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.45	1.57	99.3		0.206	0.395	8.27	14.1	7206

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	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)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	Omit map	PDB ID 4E34 without peptide	1.45	19.732	8.27	2	32531	32353	1615	99.5	0.1779	0.177	0.1711	0.1947	0.1916	In thin shells

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]
2.2854			-0.6816		-1.6038

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	19.707
f_angle_d	1.497
f_chiral_restr	0.109
f_bond_d	0.008
f_plane_restr	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1603
Nucleic Acid Atoms
Solvent Atoms	242
Heterogen Atoms

Software

Software
Software Name	Purpose
Blu-Ice	data collection
PHENIX	model building
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHENIX	phasing