Updated publication reference for PubMed record(s): 30787279. In this study, we use Cross-linking Mass Spectrometry to identify the interaction sites of the microtubule binding N-terminal domain of the companion of cellulose synthase 1 protein (CC1∆C223) from Arabidopsis thaliana with tubulin. We consistently detected four cross-linked peptides of CC1∆C223 to β-tubulin (K40 to E111, K94 to E111, K96 to E111 and K96 to E158; letters and numbers indicate specific amino acids in the protein sequence of CC1∆C223 and β-tubulin, respectively) and one cross-linked peptide of CC1∆C223 to α-tubulin (K40 to D327).