Update gao_upx.md

fix issue #285 (closed)

content/3.defense-systems/gao_upx.md

@@ -9,9 +9,17 @@ tableColumns:
     Sensor: Unknown
     Activator: Unknown
     Effector: Unknown
+contributors:
+    - Marian Dominguez-Mirazo
+relevantAbstracts:
+    - doi: 10.1126/science.aba0372
 ---
 
-# Gao_Upx
+# Gao_upx
+## Description
+The Gao_upx 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=10.1126/science.aba0372}. It's been identified as part of a highly conserved core defense hotspot in *Pseudomonas aeruginosa* strains :ref{doi=10.1093/nar/gkad317}. 
+## Molecular mechanisms
+As far as we are aware, the molecular mechanism is unknown. 
 ## Example of genomic structure
 
 The Gao_Upx system is composed of one protein: UpxA.
@@ -68,12 +76,3 @@ 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
-
----
-::