Peptide synthetases are involved in the non-ribosomal synthesis of peptide antibiotics. Next to the operons encoding these enzymes, in almost all cases, are genes that encode proteins that have similarity to the type II fatty acid thioesterases of v ...
Peptide synthetases are involved in the non-ribosomal synthesis of peptide antibiotics. Next to the operons encoding these enzymes, in almost all cases, are genes that encode proteins that have similarity to the type II fatty acid thioesterases of vertebrates. There are also modules within the peptide synthetases that also share this similarity. With respect to antibiotic production, thioesterases are required for the addition of the last amino acid to the peptide antibiotic, thereby forming a cyclic antibiotic. Thioesterases (non-integrated) have molecular masses of 25-29 kDa.
A 4'-phosphopantetheine prosthetic group is attached through a serine. This prosthetic group acts as a a 'swinging arm' for the attachment of activated fatty acid and amino-acid groups. This domain forms a four helix bundle. This family includes memb ...
A 4'-phosphopantetheine prosthetic group is attached through a serine. This prosthetic group acts as a a 'swinging arm' for the attachment of activated fatty acid and amino-acid groups. This domain forms a four helix bundle. This family includes members not included in Prosite. The inclusion of these members is supported by sequence analysis and functional evidence. The related domain of Swiss:P19828 has the attachment serine replaced by an alanine.
This domain is found in the MbtH protein Swiss:O05821 as well as at the N terminus of the antibiotic synthesis protein NIKP1. MbtH and its homologues were first noted in gene clusters involved in non-ribosomal peptides and other secondary metabolites ...
This domain is found in the MbtH protein Swiss:O05821 as well as at the N terminus of the antibiotic synthesis protein NIKP1. MbtH and its homologues were first noted in gene clusters involved in non-ribosomal peptides and other secondary metabolites by Quadri et al [1]. This domain is about 70 amino acids long and contains 3 fully conserved tryptophan residues [2]. The structure of the PA2412 protein shows it adopts a beta-beta-beta-alpha-alpha topology with the short C-terminal helix forming the tip of an overall arrowhead shape [3]. MbtH proteins have been shown to be required for the synthesis of antibiotics, siderophores and glycopeptidolipids [3-6].
