SLC45A4 is a member of the SLC45 family of solute carriers. Analysis of the protein function in a recombinant yeast expression assay show that it can: (i) transport a disaccharide,sucrose, as well simple sugars such as glucose and fructose (ii) perform secondary active transport in a proton-dependent manner.
It is associated with sugar transport in the spermatozoa. Additionally, it has been itdentified as a necessary component in the cell death caused of the compound paraquat.
^Bartölke R, Heinisch JJ, Wieczorek H, Vitavska O (December 2014). "Proton-associated sucrose transport of mammalian solute carrier family 45: an analysis in Saccharomyces cerevisiae". The Biochemical Journal. 464 (2): 193–201. doi:10.1042/BJ20140572. PMID25164149.