Related Experiment Video
Updated: Aug 17, 2026

A Visual Assay to Monitor T6SS-mediated Bacterial Competition
Published on: March 20, 2013
Aim, Load, Fire: The Type VI Secretion System, a Bacterial Nanoweapon
Francesca R Cianfanelli1, Laura Monlezun1, Sarah J Coulthurst1
1Division of Molecular Microbiology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, UK.
Abstract:
Bacteria utilise specialised protein secretion systems to interact with host organisms, competitor bacteria, and the environment. The Type VI secretion system (T6SS) is a versatile weapon deployed by many bacterial species to target either host cells or rival bacteria. The widespread occurrence and significance of the T6SS is becoming increasingly appreciated, as is its intriguing mode of action. The T6SS delivers multiple, diverse effector proteins directly into target cells using a dynamic 'firing' mechanism related to the action of contractile bacteriophage tails. Here, we summarise the contribution of recent findings to our developing picture of how the T6SS assembles and fires, how it is loaded with different types of effectors, and how it can be aimed towards an incoming assault.
More Related Videos
Related Concept Videos
CRISPR and crRNAs
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
Defense Against Bacterial Pathogens
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Gram-negative Bacterial Protein Secretion Systems
Viral Replication: Lytic Cycle
The Antiviral System of Bacteria and Archaea: CRISPR
Bacterial Toxins

