Relion

Relion 3.1.3

To familiarize yourself with Relion, you should work through the Relion 3.1.3 tutorial.

Below are screenshots and instructions you won't find in the tutorial that are specific to running Relion on Tempest in the Wiedenheft lab.

Requirements

Command line access to Tempest with X11 forwarding enabled
- Make sure you are using the -X flag when using ssh
- ```
ssh -X <yournetID>@tempest-login.msu.montana.edu
```
The Relion tutorial dataset
- Accessible at: /mnt/blackmore/mcb-wiedenheft/EM-data/relion-tutorial/relion30_tutorial

A project directory in /mnt/blackmore/mcb-wiedenheft/EM-data/relion-tutorial

Use the following commands, replacing <your_netID> with your netID

mkdir /mnt/blackmore/mcb-wiedenheft/EM-data/relion-tutorial/<your_netid>_tutorial

cd /mnt/blackmore/mcb-wiedenheft/EM-data/relion-tutorial/<your_netid>_tutorial

A link between the tutorial dataset and your project directory
- Note: Never use the rm -r flag with symbolic links. You must first destroy the symbolic link using the unlink command. Reach out if you have any quetions.
- ```
ln -s /mnt/blackmore/mcb-wiedenheft/EM-data/relion-tutorial/relion30_tutorial/Movies Movies
```
An MTF file for the Talos Arctica
- This can be found at: /mnt/blackmore/mcb-wiedenheft/EM-data/relion-tutorial/mtf_k2_200kV.star

Loading the Relion 3.1.3 module

Note: as of 2023-10-30, the following sequence must be used for Relion to be functioning

module load cryoem/relion/5.0 

module unload cryoem/relion/5.0 

module unload UCX

module load cryoem/relion/3.1.3

You should see the following:

module load

Running Relion

Run the following command from your project directory

relion &

You should see a pop up that tells you that this does not look like a project directory, and ask you if you want to continue. Click "Yes".

You should see the following screen open in your X11 forwarding app (on Mac: X11 Quartz)

To select a specific job type, click on a job in the menu on the left - in the below image, "Import" is selected.

Relion main screen

Importing micrographs

Select the "Import" job
Fill in the "Movies/mics" tab as below
Click "Run!"

Import movies screenshot

Verify that your session is working as expected with a quick ls in your project directory
You should have two new items in your project directory:
- A default_pipeline.star file
- An "Import" directory

import check