2CXG | pdb_00002cxg

CYCLODEXTRIN GLYCOSYLTRANSFERASE COMPLEXED TO THE INHIBITOR ACARBOSE

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.55		PROTEIN WAS CRYSTALLIZED FROM OTHER LIQUOR CONTAINING 60% V/V METHYL-PENTANEDIOL (MPD) 100 MM SODIUM-HEPES PH 7.55 AND 0.5% W/V MALTOSE THEN SOAKED IN MOTHER LIQUOR WITH 0.1 % ACARBOSE AND 0.5 % MALTOSE FOR 5 DAYS

Crystal Properties
Matthews coefficient	Solvent content
2.9	59

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 120.887	α = 90
b = 111.903	β = 90
c = 65.748	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	293	DIFFRACTOMETER	ENRAF-NONIUS FAST		1992-06-14	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-21

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	2.5	29	73.9	0.086	0.086		2.42		59552			14.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.5	2.58	40.3

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-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	R FREE	1CDG	2.5	8	23325	22281	2148	73	0.187	0.187	0.182	0.23	EVERY 10TH REFLECTION

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	18.245
t_it	1.286
t_angle_deg	1.147
t_nbd	0.009
t_gen_planes	0.007
t_bond_d	0.004
t_trig_c_planes	0.004
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5264
Nucleic Acid Atoms
Solvent Atoms	92
Heterogen Atoms	137

Software

Software
Software Name	Purpose
MADNES	data collection
BIOMOL	data reduction
TNT	refinement
MADNES	data reduction
BIOMOL	data scaling
TNT	phasing

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 R01GM157729.