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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Biosynthesis of indole-3-acetic acid via the indole-3-acetamide pathway in Streptomyces spp.

Various Streptomyces spp. including S. violaceus, S. scabies, S. griseus, S. exfoliatus, S. coelicolor and S. lividans secrete indole-3-acetic acid (IAA) when fed with L-tryptophan (Trp). Production of IAA was detected in Streptomyces strains causing potato scab as well as in non-pathogenic strains. The pathways for IAA synthesis from Trp were investigated in S. violaceus and S. exfoliatus. Indole-3-acetamide (IAM), indole-3-lactic acid (ILA), indole-3-ethanol (IEt) and IAA were identified by HPLC and GC-MS. Streptomyces cells were capable of catabolizing IAM, ILA, IEt and indole-3-acetaldehyde (IAAId) into IAA. Incorporation of radioactivity into IAM, IAA and ILA but not IEt was detected when cells were fed with L-[3-14C]tryptophan. Results indicate the presence of the IAM pathway (Trp-->IAM-->IAA) and the possible presence of additional pathways for IAA biosynthesis in Streptomyces.[1]

References

  1. Biosynthesis of indole-3-acetic acid via the indole-3-acetamide pathway in Streptomyces spp. Manulis, S., Shafrir, H., Epstein, E., Lichter, A., Barash, I. Microbiology (Reading, Engl.) (1994) [Pubmed]
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