Physiology

Vibrio bacteria use their T6SS killing machine for movement or DNA uptake.

Should I kill or should I go? Bacteria making decisions

Bacteria have powerful killing machines with which they carve out their own niches. To kill competitors, bacteria from the Vibrio family, have a powerful crossbow and its arrows availble. However, these bacteria can decide whether they risk a kill and take up what’s left of the dead prey or they escape the dangerous situation. Here, we look at how bacteria decide to kill or flee.

Bacteria cause caries by producing an acidic environment.

How bacteria cause caries on your teeth

Bacteria in your mouth protect your teeth from pathogenic bacteria. When you eat lots of sugars, the pathogens can fight off your friendly bacteria. The more pathogenic bacteria grow on your teeth, the more acids they produce that can cause caries and cavities. Learn about the bacterial battles in your mouths.

Human red blood cells have two different antigens on their surface

Bacteria changing blood types

Some bacteria in our guts have proteins that cleave off sugars from our blood cells. This can lead to temporally changing blood types to feed the bacteria.

Bacteria form nanotubes between cells to exchange nutrients

How bacteria feed each other in times of hunger

When bacteria are hungry, they sometimes also need the help of their friends. In that case, bacteria can build little tubes between them to exchange nutrients. With this bacterial nanotube, they can exchange nutrients and thus feed each other to make sure everyone survives.

Regulatory circuit of how bacteria sense environmental signals. Membrane bound anti-sigma factor releases a sigma factor into the cytosol after signal binding which modifies gene expression

How bacteria sense iron in their environment

Bacteria sense iron in the environment via proteins that are transporters and receptors in one. The transporter imports iron, while the receptor tells the bacterium that iron is present on the outside. This activates a whole circuit so that the bacterium produces more transporters to capture as much iron as possible.