S-box Element

The S-box element is a riboswitch that controls different genes of sulphur metabolism in response to the presence of S-adenosylmethionine.

• Upon binding of SAM, the riboswitch adopts a terminator structure resulting in transcription termination.
• In the aabsence of SAM, the riboswitch has the antitermination structure that allows transcription elongation into the controlled gene/ operon.

Genes controlled by S-box element:

• cysH-cysP-sat-cysC-ylnD-ylnE-ylnF
• metE
• metK
• yitJ-yitI-yitH
• yjcI-yjcJ
• mtnK-mtnS
• ykrW
• yoaD
• yusC
• yxjG
• yxjH