Nonribosomal peptide synthetase; part of the gene cluster that mediates the biosynthesis of hydroxamate-containing siderophores that play a critical role in virulence (PubMed:17043871, PubMed:17601875). Gibberella zeae produces extracellular coprogen-type siderophores as well as the intracellular siderophore ferricrocin (PubMed:17056706). The role of extracellular siderophores is to supply iron to the fungus during plant infection, and the intracellular ferricrocin is required for intracellular iron distribution and storage with a crucial role in ascus and ascospore development (PubMed:17056706, PubMed:17043871, PubMed:17601875). SID1 catalyzes the conversion of L-ornithine to N(5)-hydroxyornithine, the first step in the biosynthesis of all hydroxamate-containing siderophores (PubMed:20507510). The assembly of extracellular coprogen-type siderophores is performed by the nonribosomal peptide synthetase (NRPS) NPS6 whereas the intracellular siderophore ferricrocin is assembled by NPS2 (PubMed:17056706, PubMed:17043871, PubMed:17601875). Siderophore biosynthesis. NRP synthetases are composed of discrete domains (adenylation (A), thiolation (T) or peptidyl carrier protein (PCP) and condensation (C) domains) which when grouped together are referred to as a single module (By similarity). Each module is responsible for the recognition (via the A domain) and incorporation of a single amino acid into the growing peptide product (By similarity). Thus, an NRP synthetase is generally composed of one or more modules and can terminate in a thioesterase domain (TE) that releases the newly synthesized peptide from the enzyme (By similarity). Occasionally, methyltransferase domains (responsible for amino acid methylation) are present within the NRP synthetase (By similarity). NPS6 contains a degenerate A domain (dA) in the second module and has the following architecture: A-T-C-dA-T-T-C (PubMed:17056706). Leads to increased sensitivity to oxidative stress and raduces the virulence toward wheat plants (PubMed:17056706). Belongs to the NRP synthetase family.