1BKX

A BINARY COMPLEX OF THE CATALYTIC SUBUNIT OF CAMP-DEPENDENT PROTEIN KINASE AND ADENOSINE FURTHER DEFINES CONFORMATIONAL FLEXIBILITY

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	THE RC.ADE BINARY COMPLEX CRYSTALS WERE GROWN AT 4 C BY THE HANGING-DROP VAPOR DIFFUSION METHOD. THE CRYSTALLIZATION DROPLET CONTAINED PROTEIN (0.5 MM), ADENOSINE (3 MM) AND 2-METHYL-2,4-PENTANEDIOL (MPD; 4%) IN 100 MM BICINE BUFFER AT PH 8.0. THE CRYSTALLIZATION WELL SOLUTION WAS MADE UP OF 15% MPD AND 100 MM AMMONIUM-SULFATE IN BICINE BUFFER (100 MM; PH 8.0). THE CRYSTALS GREW OVER THE COURSE OF 8-12 WEEKS TO A FINAL SIZE OF 0.2 X 0.3 X 0.5 MM3., vapor diffusion - hanging drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.6	51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.85	α = 90
b = 73.23	β = 90
c = 98.72	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	277	AREA DETECTOR	XUONG-HAMLIN MULTIWIRE		1994-09-13	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.6	30	86	0.094	8.5	2.5		10720			45

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.6	2.7	74		0.2	1	1.5

Refinement

Statistics
Diffraction ID	Structure Solution 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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1CTP	2.6	10	10720	10720		86	0.219	0.219	0.205	0.34

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
t_dihedral_angle_d	20.2
t_it	12.8
t_angle_deg	1.7
t_nbd	0.03
t_bond_d	0.02
t_gen_planes	0.02
t_trig_c_planes	0.01
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2801
Nucleic Acid Atoms
Solvent Atoms	12
Heterogen Atoms	19

Software

Software
Software Name	Purpose
X-PLOR	model building
TNT	refinement
X-PLOR	refinement
UCSD	data reduction
UCSD	data scaling
X-PLOR	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.