Update pd-t7-5.md

content/3.defense-systems/pd-t7-5.md

@@ -9,14 +9,22 @@ tableColumns:
     Sensor: Unknown
     Activator: Unknown
     Effector: Unknown
+contributors: 
+  - Hugo Vaysset
 relevantAbstracts:
-    - doi: 10.1038/s41564-022-01219-4
+  - doi: 10.1038/s41564-022-01219-4
 ---
 
 # PD-T7-5
-## Example of genomic structure
 
-The PD-T7-5 is composed of 1 protein: PD-T7-5.
+## Description
+PD-T7-5 is a defense system composed of a single protein which was discovered in :ref{doi=10.1038/s41564-022-01219-4}. Its antiphage activity was assessed by heterologous expression in *E. coli* against T7 and to reduce the size of lysis plaques of T3 :ref{doi=10.1038/s41564-022-01219-4}. PD-T7-5 contains a PD(D/E)XK nuclease domain like [PD-T7-1](/defense-systems/pd-t7-1).
+
+## Molecular mechanism
+As far as we are aware, the molecular mechanism is unknown. However, the presence of a PD(D/E)XK domain in PD-T7-5 suggests a mechanism of action via DNA degradation :ref{doi=10.1038/s41564-022-01219-4}.
+
+## Example of genomic structure
+The PD-T7-5 system is composed of one protein: PD-T7-5.
 
 Here is an example found in the RefSeq database:
 
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 </mermaid>
-