This domain is found in LnmK and is present in Streptomyces atroolivaceus. LnmK is a bifunctional acyltransferase/decarboxylase (AT/DC) that catalyzes first self-acylation using methylmalonyl-CoA as a substrate and subsequently trans-acylation of the methylmalonyl group to the phosphopantetheinyl group of the LnmL acyl carrier protein. LnmK is a homodimer composed of two monomeric double-hot-dog folds (DHDF). This domain is the N-terminal hot dog fold [1].

1: Structure of the bifunctional acyltransferase/decarboxylase LnmK from the leinamycin biosynthetic pathway revealing novel activity for a double-hot-dog fold. Lohman JR, Bingman CA, Phillips GN Jr, Shen B; Biochemistry. 2013;52:902-911. PMID:23320975