EMBO workshop 2021
The tutorials listed here take place virtually on the 11th and 13th of September of 2021 (14:00-18:30) as part of the EMBO workshop for Image processing in cryoEM.
- 1 Tutorials
- 2 Contents
- 2.1 Alignment of tilt series
- 2.2 Models
- 2.3 Template matching
- 2.4 Subtomogram averaging
- 2.5 High resolution pipelines
Please refer to your course material to access your two sets of credentials:
- A set of credentials to enter Guacamole (the platform for connecting via browser). These are common to all participants.
- A set of course credentials to enter the actual machines where the course will be done: the EMBO21 UserID. These are unique to each participant.
Connecting to guacamole
- Go to:
in your browser. At this stage you should maximise your browser, otherwise you will have visualisation problems when opening Dynamo.
- Enter your Guacamole credentials.
Connecting to your machine
Now you need to select a machine. Please then click on +em and then +Servers - Public and select server Zeus-0-14.
When you select the machine, you will prompted to use your EMBO21 UserID
This should access your virtual Linux XFCe desktop, which should look like this in your browser
If you open a terminal (with the terminal icon) you can test by typing
that you are in the correct path, which should be:
where XX stands for your actual workshop participant number.
Load and run Dynamo
First you load the standalone version of Dynamo:
module load dynamo/v1.1.524
and then it can be run by simply typing:
Dynamo specific commands are then typed into this so called Dynamo console. For example, try to type the Dynamo command
to see the current version that you are using. Note: Copy paste of commands from your local desktop into the dynamo standalone console on the remote Linux XFCe desktop might not always work. We suggest to additionally open the tutorials that you will be working on in a browser inside the remote Linux XFCe desktop itself, in case you need to copy paste long commands.
Dynamic of the course
The course is divided into different modules, described in the time schedule below. Each module is structured in three stages:
- Demostration: All students are connected to the main room. The goals of the module will be explained by an instructor.
- Individual work: Students go the assigned breakout rooms to work on the tutorials independently. An instructor will be assigned to each breakout room to help with questions.
- Common discussion: In the last 5 minutes of the module, we come back to the general breakout room to wrap up the module.
Each module has one or several tutorials. The data of the tutorials is sometimes synthetic and created on the fly, and sometimes a data set is necessary. The data will be available in the filesystem. The general repository for the data is:
This time schedule is tentative
Day 1: Tomography
|14:30||Tilt series alignment: manually|
|15:00||Tilt series alignment: GUI|
|15:30||Tilt series alignment: command line|
|16:30||Models: catalogue system|
|17:00||Models: helical symmetry|
|17:30||Models: vesicles and surfaces|
Day 2: Subtomogram averaging
|14:30||Getting started: synthetic thermosomes|
|15:30||Advanced tutorial: FHV|
|18:00||High resolution pipelines|
Alignment of tilt series
We will align the same tilt series tilt series with two different approaches. We prepared the first tilt series from the EMPIAR entry 10164, depicting a set of virus like particles (VLP). Move to the directory that contains this data using the command:
Double-check by typing
to see all files in the directory. One file should be the following tilt series:
This is a binned version (for quicker processing) with the pixel size is 2.7 Angstrom (original deposition is 1.35).
Automated alignment of tilt series through the GUI
Automated alignment of tilt series through the command line
Vesicle and surface models
tutorial on membrane modeling with dmslice
Reusing model workflows ( walkthrough)
walkthrough for automated identification of proteosomes on a real tomogram through template matching. (~1 hour)
The data is available at:
An example of template and its mask are provided as 'average32.em' and 'maskTight32.em'.
- Basic Dynamo jargon
- tutorial on basic elements: help, data and metadata formats.
- tutorial on the basic concept in Dynamo alignment: the project.
Working on your own:
Basic walkthrough: creating a catalogue, picking particles, launching a project.
Advanced starters guide
Complete the advanced starters guide (~2 hours) The data can be found in
To use chimera path you need in the tutorial is
Tutorial from densely packed spherical geometry (~1 hour). The data is available at:
Since the final alignment project is run on the standalone version of Dynamo, the 'destination' parameter should be 'standalone' instead of 'matlab_parfor'
High resolution pipelines
Exercise to train a realistic case including all processing steps from catalogue creation to final structure using a reduced dataset. Start with the exercise and refer to the complete walkthrough for guidance or the solution.
Alister: Not a tutorial per se: this is a presentation on a set of tools to interconnect Dynamo, M and other software.
A set of tools have been developed which provide a means to use the geometrical tools and alignment projects from Dynamo with data preprocessed in Warp. These tools mean that particle picking and alignment can be performed in Dynamo prior to multi-particle refinement in M.