| Property | Value |
|---|---|
| Gene name | klp-20 (pqac-00000000) |
| ORF name | Y50D7A.6 |
| UniProt accession | Q965T6 |
| Protein family | Kinesin-2 / heterotrimeric kinesin-II; TRAFAC-class myosin-kinesin ATPase superfamily (pqac-00000000, pqac-00000003) |
| Complex partners | KLP-11 and KAP-1 form the heterotrimeric kinesin-II complex with KLP-20 (pqac-00000000, pqac-00000001, pqac-00000003) |
| Mammalian ortholog / counterpart | Functional counterpart within the mammalian heterotrimeric kinesin-II complex: KIF3B (with KIF3A and KAP3/KIFAP3) (pqac-00000003, pqac-00000016) |
| Molecular function | ATP-dependent microtubule motor that drives anterograde intraflagellar transport (IFT) of IFT complexes/cargo during ciliogenesis and ciliary maintenance (pqac-00000000, pqac-00000002, pqac-00000016) |
| Subcellular localization | Cilia of ciliated sensory neurons, including amphids, phasmids, IL2 neurons, and male-specific sensory neurons (pqac-00000000, pqac-00000001, pqac-00000002) |
| Motor velocity alone | ~0.5 μm/s for kinesin-II anterograde movement in amphid channel cilia / transition zone loading phase (pqac-00000000, pqac-00000004, pqac-00000010) |
| Motor velocity with OSM-3 | ~0.7 μm/s when kinesin-II and OSM-3 co-transport IFT trains in the middle segment (pqac-00000001, pqac-00000010) |
| Key biological process | Intraflagellar transport supporting cilia assembly, maintenance, and organization of middle/proximal ciliary segments (pqac-00000003, pqac-00000006, pqac-00000011) |
| Functional division of labor | Kinesin-II loads/navigates IFT trains through the transition zone and cooperates with OSM-3 in the middle segment; OSM-3 alone builds/transports in the distal segment (pqac-00000004, pqac-00000008, pqac-00000010) |
| Mutant phenotype | In single mutants of heterotrimeric kinesin-II genes including klp-20, amphid chemosensory cilia are maintained because OSM-3 compensates; thus klp-20 loss alone yields a relatively mild/partially redundant ciliary phenotype (pqac-00000016) |


*Table: This table summarizes the core annotated and literature-supported properties of C. elegans KLP-20, including its kinesin-II complex membership, ciliary localization, transport role, velocities, and mutant behavior. It is useful as a compact reference for functional annotation.*