TCDB is operated by the Saier Lab Bioinformatics Group

9.B.334.  The Archael N-terminal Transmembrane  Domain Linked to a Sensor Kinase or MCP Domain (N-TM/SK/MCP) Family 

These archaeal proteins have an N-terminal transmembrane domain followed by a SK or MCP domain.  There seems to be tremendous variation in the combinations of these domains. They are grouped together here as their primary function is probably determined by the hydrophilic domain.  The transmembrane domains may serve as membrane anchors.