The function of NCKAP5L (NCK associated protein 5 like, ENSG00000167566) is as follows. Regulates microtubule organization and stabilization. Promotes microtubule growth and bundling formation and stabilizes microtubules by increasing intense acetylation of microtubules (PubMed:26482847, PubMed:26485573). Both tubulin-binding and homodimer formation are required for NCKAP5L-mediated microtubule bundle formation (PubMed:26485573). {ECO:0000269|PubMed:26482847, ECO:0000269|PubMed:26485573}.