Experiment: 1AJ6

NOVOBIOCIN-RESISTANT MUTANT (R136H) OF THE N-TERMINAL 24 KDA FRAGMENT OF DNA GYRASE B COMPLEXED WITH NOVOBIOCIN AT 2.3 ANGSTROMS RESOLUTION

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		wild-type AA3 to be deposited shortly.

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2		HANGING DROP VAPOR DIFFUSION; 12MGS/ML PROTEIN/NOVOBIOCIN MIXED WITH EQUAL VOLUME OF RESERVOIR SOLUTION (12% V/V PEG200, 100MM MES PH6.2), vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
2.2	45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 39.5	α = 90
b = 47.72	β = 90
c = 114.41	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	IMAGE PLATE	MARRESEARCH	VERTICALLY FOCUSSED PT-COATED MIRROR	1996-06-02	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX9.6		SRS	PX9.6

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	2.3	19.8	94.8	0.065	0.065	8.5	5.1		9455			23.7

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	2.3	2.38	97		0.131	0.131	5.6	5.2

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-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	THROUGHOUT	WILD-TYPE 24KDA FRAGMENT/NOVOBIOCIN COMPLEX	2.3	19.8	9455	9455	999	95	0.206	0.206	0.195	0.2061	0.29	RANDOM

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	18.9
t_it	2.1
t_angle_deg	1.366
t_nbd	0.051
t_gen_planes	0.015
t_bond_d	0.012
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	1459
Nucleic Acid Atoms
Solvent Atoms	89
Heterogen Atoms	44

Software

Software
Software Name	Purpose
CCP4	model building
TNT	refinement
MOSFLM	data reduction
CCP4	data scaling
CCP4	phasing