Intraflagella Transport (IFT) complex proteins are evolutionary related to coat protein complexes. The IFT-A subcomplex mediates retrograde transport of large proteins/complexes within the intraflagella transport system. It interacts with the BBSome and IFT-B complexes. (Adapted from PMID:22118932, PMID:19575670 and FBrf0223369).
Notes on Group
Orthologs for intraflagellar transport subcomplex-A components TTC21A/B and IFT139 have not been identifed in D.mel (FBrf0223491).