| Subunit Name | *C. elegans* Ortholog | Subcomplex | Domain Architecture | Key Function |
|---|---|---|---|---|
| IFT140 | CHE-11 | Core / A1 | N-terminal WD repeats / β-propellers plus C-terminal TPR domains | Stabilizes the IFT-A complex, contributes to retrograde IFT, and supports transport of membrane-associated ciliary cargoes (pqac-00000009, pqac-00000011, pqac-00000012) |
| IFT144 | DYF-2 | Core / A1 | WD repeats / β-propellers plus TPR domains | Forms a heterodimeric core unit with IFT140 through TPR-mediated interactions and helps build the A1 V-shaped architecture (pqac-00000009, pqac-00000010) |
| IFT122 | DAF-10 / IFT-122 | Core linker between A1 and A2 | WD repeats / β-propellers plus TPR domains | Bridges the core and peripheral modules; its TPR region extends to contact IFT140 and IFT144, linking A1 and A2 (pqac-00000009, pqac-00000010, pqac-00000014) |
| IFT139 | IFT-139 | Peripheral / A2 | TPR domains throughout | Peripheral IFT-A component important for peripheral module stability and retrograde IFT-related organization (pqac-00000013, pqac-00000015) |
| IFT121 | IFT-121 | Peripheral / A2 | WD repeats / β-propellers plus TPR domains | Peripheral component of A2; interacts with IFT43 and contacts the core via IFT122 (pqac-00000010, pqac-00000014) |
| IFT43 | IFT-43 | Peripheral / A2 | Coiled-coil domain | Peripheral component that directly interacts with IFT121 and supports A2 integrity and localization (pqac-00000014, pqac-00000029) |


*Table: This table summarizes the six-subunit IFT-A complex with emphasis on the CHE-11/IFT140-containing core module, domain architecture, and inferred functional roles. It is useful for linking the worm che-11 gene to conserved IFT-A assembly and cargo-transport mechanisms.*