VPS13D and cerebellar ataxia: VPS13D is a lipid transporter recently described as a Miro interactor which bridges the ER and mitochondria (Guillén-Samander et al, 2021), is essential in mammals (Blomen et al, 2015; Wang et al, 2015), and alleles of which cause recessive spinocerebellar ataxia (Seong et al, 2018; Gauthier et al, 2018).