Acyl transferase domain in polyketide synthase (PKS) enzymes [Secondary metabolites biosynthesis, transport and catabolism].

polyketide synthases (PKSs) polymerize simple fatty acids into a large variety of different products, called polyketides, by successive decarboxylating Claisen condensations. PKSs can be divided into 2 groups, modular type I PKSs consisting of one or more large multifunctional proteins and iterative type II PKSs, complexes of several monofunctional subunits.

peptide synthase; Provisional

peptide synthase; Provisional

The adenylation domain of nonribosomal peptide synthetases (NRPS), including Bacillus subtilis termination module Surfactin (SrfA-C). The adenylation (A) domain of NRPS recognizes a specific amino acid or hydroxy acid and activates it as an (amino) acyl adenylate by hydrolysis of ATP. The activated acyl moiety then forms a thioester to the enzyme-bound cofactor phosphopantetheine of a peptidyl carrier protein domain. NRPSs are large multifunctional enzymes which synthesize many therapeutically useful peptides in bacteria and fungi via a template-directed, nucleic acid independent nonribosomal mechanism. These natural products include antibiotics, immunosuppressants, plant and animal toxins, and enzyme inhibitors. NRPS has a distinct modular structure in which each module is responsible for the recognition, activation, and, in some cases, modification of a single amino acid residue of the final peptide product. The modules can be subdivided into domains that catalyze specific biochemical reactions. This family includes the adenylation domain of the Bacillus subtilis termination module (Surfactin domain, SrfA-C) which recognizes a specific amino acid building block, which is then activated and transferred to the terminal thiol of the 4'-phosphopantetheine (Ppan) arm of the downstream peptidyl carrier protein (PCP) domain.

Crystalstructure of dimodular LgrA in a condensation state [Brevibacillus parabrevis],6MFZ_B Crystal structure of dimodular LgrA in a condensation state [Brevibacillus parabrevis]

ChainA, CurL [Moorena producens 3L],4MZ0_B Chain B, CurL [Moorena producens 3L]

Crystalstructure of a 5-domain construct of LgrA in the substrate donation state [Brevibacillus parabrevis],6MG0_A Crystal structure of a 5-domain construct of LgrA in the thiolation state [Brevibacillus parabrevis],6MG0_B Crystal structure of a 5-domain construct of LgrA in the thiolation state [Brevibacillus parabrevis]

Streptomcyesalbus JA3453 oxazolomycin ketosynthase domain OzmN KS2 [Streptomyces albus],4WKY_B Streptomcyes albus JA3453 oxazolomycin ketosynthase domain OzmN KS2 [Streptomyces albus]

Thestructure of condensation and adenylation domains of teixobactin-producing nonribosomal peptide synthetase Txo2 serine module [Eleftheria terrae],6P1J_B The structure of condensation and adenylation domains of teixobactin-producing nonribosomal peptide synthetase Txo2 serine module [Eleftheria terrae]

Gramicidin S synthase 2 OS=Brevibacillus brevis OX=1393 GN=grsB PE=1 SV=2

Tyrocidine synthase 3 OS=Brevibacillus parabrevis OX=54914 GN=tycC PE=1 SV=1

Gramicidin S synthase 2 OS=Aneurinibacillus migulanus OX=47500 GN=grsB PE=3 SV=2

Bacitracin synthase 1 OS=Bacillus licheniformis OX=1402 GN=bacA PE=3 SV=1

Bacitracin synthase 3 OS=Bacillus licheniformis OX=1402 GN=bacC PE=3 SV=1