TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
9.B.334.1.1









UP of 387 aas with 7 N-terminal TMSs and a C-terminal methyl-accepting chemotaxis protein 3 domain.

Archaea
Candidatus Lokiarchaeota
UP of Lokiarchaeum sp. GC14_75
9.B.334.1.2









Uncharacterized sensor histidine kinase of 434 aas and 6 TMSs with a COG0642 domain.

Archaea
Candidatus Lokiarchaeota
UP of Lokiarchaeum sp. GC14-75
9.B.334.1.3









The aerotaxis protein, Aer or YqjJ of 506 aas and 1 or 2 TMSs. The aerotactic response causes the accumulation of cells around air bubbles in liquid media under a cover slip. The nature of the sensory stimulus detected by this protein is the proton motive force (pmf) and the cellular redox state. It uses an FAD prosthetic group as a redox sensor to monitor oxygen levels (Bibikov et al. 1997). The redox properties and PAS domain structure of  Aer indicate a multistate sensing mechanism (Maschmann et al. 2022).

Bacteria
Pseudomonadota
Aer of E. coli