** The Quorum Sensing Database QSDB v1.1**

QSDB contains hand-curated information of about 465 sensing and quenching relations between organisms and chemical signal molecules (429 sensing, 36 quenching), with  123 listed organisms and 92 signals, making it the largest and most up-to-date collection of this information worldwide. All information is presented using established standards in systems biology, in particular SBGN for the graphical representation.

All information was extracted manually through an extensive survey of literature and online databases and is linked to PubMed and PubChem. In addition to the sensing indication, the database provides detailed information on the type of evidence, the response, sequence identity, effects, and receptors involved. For all entries, evidence references are given.

QSDB and its web interface are maintained by the chair for life science informatics at the university of Konstanz (https://www.cls.uni-konstanz.de/) and the research group of Thomas Böttcher (https://www.chemie.uni-konstanz.de/boettcher/). For further information and enquiries, contact us by email at [info@qsdb.org].

Sensing entry description:
Yes: Does produce/sense/quench
No: does not produce/sense/quench
Yes?: it is suspected to produce/sense/quench
"Yes": it does react to it but it is uncertain if it is by a receptor or other ways
Inhibit: Signal inhibits a certain phenotype/gene expression/not necessarily via a signal receptor
?: unknown
