7T0O
cryoEM reconstruction of the HIV gp140 in complex with the extracellular domains of CD4 and the adnectin domain of Combinectin. The gp140 and CD4 coordinates from entry 6EDU were rigid body fitted to the EM map along withe the crystal structure of CD4+adnectin
ELECTRON MICROSCOPY
Sample |
---|
Ternary complex of the HIV-1 gp140 trimer in complex with the extracellular domains (domains 1-4) of CD4 and an adnectin domain of Combinectin |
Specimen Preparation | |
---|---|
Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details |
3D Reconstruction | |
---|---|
Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 208485 |
Reported Resolution (Å) | 8.7 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C3 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 | ||||
Refinement Space | |||||
Refinement Protocol | RIGID BODY FIT | ||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | FEI FALCON III (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 1.022 |
Imaging Experiment | 1 |
---|---|
Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 1400 |
Maximum Defocus (nm) | 3400 |
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) | 300 |
Imaging Details |
EM Software | ||
---|---|---|
Task | Software Package | Version |
PARTICLE SELECTION | Topaz | |
IMAGE ACQUISITION | EPU | |
CTF CORRECTION | CTFFIND | |
MODEL FITTING | UCSF Chimera | |
INITIAL EULER ASSIGNMENT | RELION | |
FINAL EULER ASSIGNMENT | RELION | |
CLASSIFICATION | RELION | |
RECONSTRUCTION | RELION | |
Image Processing | ||||
---|---|---|---|---|
CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION |