S-element

{{Infobox rfam

| Name = S-element

| image = RF00490.jpg

| width =

| caption = Predicted secondary structure and sequence conservation of S-element

| Symbol = S-element

| AltSymbols =

| Rfam = RF00490

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| miRBase_family =

| RNA_type = Cis-reg

| Tax_domain = Bacteria

| GO =

| SO = {{SO|0000233}}

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| PDB =

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}}

The S-element is an RNA element found in p42d and related plasmids. The S-element has multiple functions and is believed to act as a negative regulator of repC transcription, and be required for efficient replication and act as a translational enhancer of repC.{{cite journal | vauthors = Venkova-Canova T, Soberón NE, Ramírez-Romero MA, Cevallos MA | title = Two discrete elements are required for the replication of a repABC plasmid: an antisense RNA and a stem-loop structure | journal = Molecular Microbiology | volume = 54 | issue = 5 | pages = 1431–1444 | date = December 2004 | pmid = 15554980 | doi = 10.1111/j.1365-2958.2004.04366.x | s2cid = 41843742 | doi-access = free }}