Update abit.md

Modifying AbiT for #244 (closed)

content/3.defense-systems/abit.md

@@ -10,12 +10,28 @@ tableColumns:
     Activator: Unknown
     Effector: Unknown
     PFAM: PF18864
+contributors: 
+  - Florian Tesson
 relevantAbstracts:
     - doi: 10.1023/A:1002027321171
     - doi: 10.1016/j.mib.2005.06.006
+    - doi: 10.1128/jb.184.22.6325-6332.2002
 ---
 
 # AbiT
+
+## Description
+AbiT was discovered in *Lactococcus lactis* in 2022 :ref{doi=10.1128/jb.184.22.6325-6332.2002}.
+
+AbiT is one of the so-called "Abi" systems for "Abortive infection" discovered in the 90's in research related to the dairy industry :ref{doi=10.1016/j.mib.2005.06.006}. Even though, their name corresponds to abortive infection, their mechanism of action does not necessarily correspond to an abortive infection phenotype. AbiT is classified as an abortive infection in :ref{doi=10.1016/j.mib.2023.102312}.
+
+AbiT is composed of two proteins: AbiTi with a transmembrane helix domain and AbiTii.
+
+## Molecular mechanism
+
+As far as we are aware, the molecular mechanism is unknown.
+
+
 ## Example of genomic structure
 
 The AbiT is composed of 2 proteins: AbiTi and AbiTii.