Update gao_hhe.md

fix issue #209 (closed)

content/3.defense-systems/gao_hhe.md

@@ -10,9 +10,20 @@ tableColumns:
     Activator: Unknown
     Effector: Unknown
     PFAM: PF04480, PF13086, PF13087, PF13195, PF18741
+contributors:
+    - Marian Dominguez-Mirazo
+relevantAbstracts:
+    - doi: 10.1126/science.aba0372
 ---
 
 # Gao_Hhe
+
+## Description
+The Gao_hhe system is composed by a single protein. It was predicted through a guilty by association approach independent of domain annotations and validated in a heterologous system :ref{doi=10.1093/nar/gkad317}. It contains a predicted helicase and a Vsr (very short patch repair) endonuclease domain :ref{doi=10.1093/nar/gkad317,10.1128/jvi.00599-23}. 
+
+## Molecular mechanisms
+As far as we are aware, the molecular mechanism is unknown. 
+
 ## Example of genomic structure
 
 The Gao_Hhe system is composed of one protein: HheA.
@@ -71,13 +82,5 @@ end
     style Title3 fill:none,stroke:none,stroke-width:none
     style Title4 fill:none,stroke:none,stroke-width:none
 </mermaid>
-## Relevant abstracts
 
-::relevant-abstracts
----
-items:
-    - doi: 10.1126/science.aba0372
-
----
-::