This is the first step in the catalysis of malonate decarboxylation.
References
^Hilbi H, Dimroth P (1994). "Purification and characterization of a cytoplasmic enzyme component of the Na+-activated malonate decarboxylase system of Malonomonas rubra: acetyl-S-acyl carrier protein: malonate acyl carrier protein-SH transferase". Archives of Microbiology. 162 (1–2): 48–56. doi:10.1007/bf00264372. PMID18251085.