B12-binding domain/radical SAM domain protein, Pput_1520 family
Members of this family are radical SAM domain (pfam04055) enzymes with an N-terminal B12-binding domain (pfam02310), as is fairly common for radical SAM enzymes with lipid substrates. However, both domains as found in this family seem to be long-branch. The function is unknown, but all cases a PLP-dependent enzyme (a cysteine desulfurase homolog) is found nearby.
Jiyao W et al.(2023). "The conserved domain database in 2023.",