Description
Plays a role in oocyte axis determination and microtubule organization during oogenesis (PubMed:16540510, PubMed:24019068). Also required for polarized organization of the bristle (PubMed:19917727). Required, with jvl, for activation of the kinase IKKepsilon in the germ line (PubMed:24019068). Also required for localization of IKKepsilon to the distal tip of elongating bristles by acting as an adapter linking IKKepsilon and cytoplasmic dynein (PubMed:26092846). Involved in dendrite pruning in larval sensory neurons during metamorphosis (PubMed:26540204).
Subunit
Forms homooligomers (PubMed:26540204). Interacts with the dynein light chain ctp (PubMed:16540510). Interacts (via C-terminus) with IKKepsilon; this leads to phosphorylation of spn-F (PubMed:18796167, PubMed:26092846). Forms ternary complexes with ctp and IKKepsilon; this is required for spn-F redistribution from puncta in larval neurons and for dendrite pruning (PubMed:26092846, PubMed:26540204). Interacts with ctp and IKKepsilon through distinct regions (PubMed:26092846). Interacts (via C-terminus) with jvl (PubMed:24019068).
Subcellular location
Cytoplasm
Localizes to the minus ends of microtubules in oocytes (PubMed:16540510). Found in a punctate pattern colocalized with IKKepsilon in nurse cells (PubMed:16540510, PubMed:18796167). Displays a punctate pattern in the soma, dendrites and axons of larval C4da neurons but becomes dispersed in pupal neurons which is necessary for dendrite pruning (PubMed:26540204). With evidence from 2 publications.
Cytoskeleton
Localizes to the minus ends of microtubules in oocytes (PubMed:16540510). Found in a punctate pattern colocalized with IKKepsilon in nurse cells (PubMed:16540510, PubMed:18796167). Displays a punctate pattern in the soma, dendrites and axons of larval C4da neurons but becomes dispersed in pupal neurons which is necessary for dendrite pruning (PubMed:26540204). With evidence from 2 publications.
Cell projection
Localizes to the minus ends of microtubules in oocytes (PubMed:16540510). Found in a punctate pattern colocalized with IKKepsilon in nurse cells (PubMed:16540510, PubMed:18796167). Displays a punctate pattern in the soma, dendrites and axons of larval C4da neurons but becomes dispersed in pupal neurons which is necessary for dendrite pruning (PubMed:26540204). With evidence from 2 publications.
Axon
Localizes to the minus ends of microtubules in oocytes (PubMed:16540510). Found in a punctate pattern colocalized with IKKepsilon in nurse cells (PubMed:16540510, PubMed:18796167). Displays a punctate pattern in the soma, dendrites and axons of larval C4da neurons but becomes dispersed in pupal neurons which is necessary for dendrite pruning (PubMed:26540204). With evidence from 2 publications.
Dendrite
Localizes to the minus ends of microtubules in oocytes (PubMed:16540510). Found in a punctate pattern colocalized with IKKepsilon in nurse cells (PubMed:16540510, PubMed:18796167). Displays a punctate pattern in the soma, dendrites and axons of larval C4da neurons but becomes dispersed in pupal neurons which is necessary for dendrite pruning (PubMed:26540204). With evidence from 2 publications.
Perikaryon
Localizes to the minus ends of microtubules in oocytes (PubMed:16540510). Found in a punctate pattern colocalized with IKKepsilon in nurse cells (PubMed:16540510, PubMed:18796167). Displays a punctate pattern in the soma, dendrites and axons of larval C4da neurons but becomes dispersed in pupal neurons which is necessary for dendrite pruning (PubMed:26540204). With evidence from 2 publications.