Cache Domains That are Homologous to, but Different from PAS Domains Comprise the Largest Superfamily of Extracellular Sensors in Prokaryotes
Fig 2
Comparison of sequence- and structure-based definitions for extracellular PAS-like domains.
(A) Vibrio parahaemolyticus chemoreceptor (PDB: 2QHK); (B) Vibrio cholerae chemoreceptor (PDB: 3C8C). Domains are visualized on sequences with corresponding amino acid positions (top) and structures (bottom). Cache (cyan) domains are defined by Pfam; PAS domains (green and magenta) were defined by visual inspection of corresponding structures.