7QGQ

Extended H/L (SLPH/SLPL) complex from C. difficile (CD630 strain) fit into R20291 S-layer negative stain map

ELECTRON CRYSTALLOGRAPHY

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 321	α = 90
b = 261	β = 90
c = 345.312	γ = 90

Symmetry
Space Group	P 1

Refinement

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]

Sample
Electron crystallographic reconstruction of R20291 S-layer, extended to cover 12 molecules of SlpA for flexible fitting of X-ray structure to map

Specimen Preparation
Sample Aggregation State	2D ARRAY
Staining Type	NEGATIVE
Staining Material	Uranyl Formate
Staining Details	Negatively stained EM samples were prepared by depositing sample on continuous carbon layer and staining with 2 % Uranyl Formate with blotting

3D Reconstruction
Reconstruction Method	CRYSTALLOGRAPHY
Number of Particles
Reported Resolution (Å)
Resolution Method	DIFFRACTION PATTERN/LAYERLINES
Other Details
Refinement Type
Symmetry Type	3D CRYSTAL
Space Group Name
Length a	80
Length b	80
Length c	80
Angle Alpha	100
Angle Beta	90
Angle Gamma	100

Map-Model Fitting and Refinement
Id	1
Refinement Space	REAL
Refinement Protocol	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å**2)	0.1

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI/PHILIPS CM200FEG
Minimum Defocus (nm)	800
Maximum Defocus (nm)	2200
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
CTF CORRECTION	CTFFIND	3
MODEL FITTING	ISOLDE	1.1.0
LATTICE DISTORTION CORRECTION	MRC IMAGE PROCESSING PACKAGE
SYMMETRY DETERMINATION	MRC IMAGE PROCESSING PACKAGE
CRYSTALLOGRAPHY MERGING	MRC IMAGE PROCESSING PACKAGE

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION

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 R01GM133198.