tracheal epithelial cell type specification

Allocation of cells within each migrating tracheal branch to distinct tracheal cell fates. During the migration phase each branch forms a well-defined number of cell types (including fusion cells, terminal cells and branch cells) at precise positions.

Process by which a cell becomes capable of differentiating autonomously into a terminal cell in an environment that is neutral with respect to the developmental pathway; upon specification, the cell fate can be reversed. Terminal cells send long and bifurcated hollow branches toward target tissues to allow oxygen exchange.

Interacting selectively with both N-ethylmaleimide-sensitive fusion protein (NSF) and a cis-SNARE complex (i.e. a SNARE complex in which all proteins are associated with the same membrane) and increasing the ATPase activity of NSF, thereby allowing ATP hydrolysis by NSF to disassemble the cis-SNARE complex.

negative regulation of terminal cell fate specification

Any process that restricts, stops or prevents a cell from adopting a terminal cell fate. Once the terminal and fusion fates have been correctly induced, inhibitory feedback loops prevent the remaining branch cells from assuming similar fates.

Acting as a marker to identify a membrane and interacting selectively with one or more SNAREs on another membrane to mediate membrane fusion.

Process by which a cell becomes capable of differentiating autonomously into a fusion cell in an environment that is neutral with respect to the developmental pathway; upon specification, the cell fate can be reversed. Fusion cells allow the interconnection of adjacent tracheal metameres during tracheal tube fusion.

negative regulation of fusion cell fate specification

Any process that restricts, stops or prevents a cell from adopting a fusion cell fate. Once the terminal and fusion fates have been correctly induced, inhibitory feedback loops prevent the remaining branch cells from assuming similar fates.

Ensuring that a tracheal tube is of the correct diameter. When primary branches form their lumens are small (less than 2 micrometers) in caliber and must undergo regulated expansion during larval life to reach their mature size.