InterPro mappings recover the broad conserved chemotaxis and phosphorelay context for CheA-family histidine kinases, but they also seed very broad parent terms that should be reviewed for redundancy.

Combined automated methods recover the kinase activity of CheA, but the broader phosphorelay sensor kinase term is less specific than protein histidine kinase activity for this gene.

UniProt identifies Q88EW4 as chemotaxis protein CheA and states that it is autophosphorylated and can transfer phosphate to CheB or CheY.

The sequence carries an HPt domain, a histidine kinase region, and a CheW-like domain, with a phosphohistidine annotated at residue 49.

The KT2440 study identifies PP_4338 as cheA2 and reports that a cheA2 mutant is entirely deficient in maize root exudate chemotaxis.

The same study separates cheA paralog roles, with cheA1 affecting c-di-GMP and biofilm formation while cheA2 maps to the canonical chemotaxis pathway.

Synthesizes KT2440 cheA2 literature, conserved CheA domain architecture, and recent chemosensory-system reviews into a curation-focused assessment of core versus over-broad GO terms.