Associates with microtubules and may play a role in the microtubule-dependent transport of the GABA-B receptor. May play a role in JAK1 signaling and regulate microtubule cytoskeleton rearrangements. {ECO:0000269|PubMed:14718537, ECO:0000269|PubMed:15277531, ECO:0000269|PubMed:17532644}. This is the function of JAKMIP1 (janus kinase and microtubule interacting protein 1, Ensembl gene identifier ENSG00000152969).