Experiment: 4TOZ

MppA Periplasmic Murein Tripeptide Binding Protein, Unliganded Open Form

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	295	drop contained 2 microliters of 10 mg/mL protein solution and 2 microliters of the reservoir solution containing 0.2 M sodium acetate trihydrate, 0.1 M Tris-HCl, pH 8.5, 30% w/v PEG 4000

Crystal Properties
Matthews coefficient	Solvent content
2.24	45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.97	α = 90
b = 76.81	β = 91.58
c = 89.57	γ = 90

Symmetry
Space Group	P 1 21 1

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	MARMOSAIC 300 mm CCD		2004-02-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	0.9794	APS	22-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.5	90	99.6	38.5	1.008		162196

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1RKM	1.5	50	161592	7938	99.6	0.18	0.18	0.2055	0.2055	16.1

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]
0.943		-0.259	-1.945		1.002

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	2.673
c_scbond_it	1.894
c_mcangle_it	1.592
c_angle_d	1.251
c_mcbond_it	1.043
c_bond_d	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8148
Nucleic Acid Atoms
Solvent Atoms	1647
Heterogen Atoms	8

Software

Software
Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction
AMoRE	phasing
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing