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Cryo-EM Structure of Chicken Gizzard Smooth Muscle alpha-Actinin
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1DXX experimental model PDB 1HCI experimental model PDB 1CFD
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 263.1 α = 90 b = 203.7 β = 90 c = 100 γ = 107.1
Symmetry Space Group P 1 1 2
Refinement Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 14014 Nucleic Acid Atoms Solvent Atoms Heterogen Atoms
Specimen Preparation Sample Aggregation State 2D ARRAY Vitrification Instrument Cryogen Name Sample Vitrification Details Plunge frozen in liquid ethane
3D Reconstruction Reconstruction Method CRYSTALLOGRAPHY Number of Particles Reported Resolution (Å) 20 Resolution Method Other Details Fourier transforms of images were merged using standard 2-D crystal programs with amplitudes and phases derived from images alone. Refinement Type Symmetry Type 2D CRYSTAL
Map-Model Fitting and Refinement Id 1 (1DXX, 1HCI, 1CFD) Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target highest cross correlation coefficient and lowest interatom conflicts Overall B Value Fitting Procedure Details REFINEMENT PROTOCOL--rigid body
Data Acquisition Detector Type KODAK SO-163 FILM Electron Dose (electrons/Å**2)
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) 100 Microscope Model FEI/PHILIPS CM300FEG/T Minimum Defocus (nm) 2000 Maximum Defocus (nm) 6000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) 68 Nominal CS 2 Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification 24000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version MODEL FITTING RSRef RECONSTRUCTION MRC
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details Correction of phases only