Ribosomally synthesized peptide that is usually in the gene neighborhood of a RimK-like ATP-grasp, and an ABC ATPase fused to a papain-like domain. It is often present in multiple tandem gene copies. The gene contexts suggest that it is modified by the ATP-grasp as in the biosynthesis of microviridin and marinostatin. They might function in defense or development or as peptide antibiotics [1].

1: Amidoligases with ATP-grasp, glutamine synthetase-like and acetyltransferase-like domains: synthesis of novel metabolites and peptide modifications of proteins. Iyer LM, Abhiman S, Maxwell Burroughs A, Aravind L; Mol Biosyst. 2009;5:1636-1660. PMID:20023723