TY - CONF
T1 - THE SMALL PROTEIN TRPM MODULATES MORPHO-PHYSIOLOGICAL DIFFERENTIATION IN THE MODEL ACTINOMYCETE STREPTOMYCES COELICOLOR A3(2)
AU - Botta, Luigi
AU - Puglia, Anna Maria
AU - Vassallo, Alberto
AU - Gallo, Giuseppe
AU - Palazzotto, Emilia
PY - 2017
Y1 - 2017
N2 - BACKGROUNDSTrpM, a small protein of 63 amino acids, modulates tryptophan (Trp) metabolism and morpho-physiological differentiation in the filamentous bacterium Streptomyces coelicolor A3(2), a model organism for antibiotic production and cell differentiation. Indeed, the trpM knock-out mutant strain is characterized by a delayed growth on minimal medium, smaller aerial hyphae, and reduction of both spore and antibiotic actinorhodin production in comparison with the wild-type strain. These observations were in agreement with proteomic analyses which highlighted a role for TrpM in controlling i) Trp production through Trp precursor availability and, thus ii) bacterial growth and morpho-physiological differentiation.OBJECTIVESConstruction and morpho-physiological characterization of a S. coelicolor A3(2) trpM knock-in mutant.METHODS- Construction of a trpM knock-in mutant by E. coli-S. coelicolor interspecific conjugation using the pIJ8600/trpM integrative plasmid.- Scanning Electron Microscope (SEM) analysis.- Spectrophotometric analysis and microbiological assays for evaluating antibiotic production.CONCLUSIONSA trpM knock-in mutant strain of S. celicolor A3(2) was constructed and showed an increased production of actinorhodin and spores: moreover, SEM analysis revealed an earlier formation of septa in aerial hyphae and confirmed that TrpM has a role in controlling the morpho-physiological differentiation of S. coelicolor A3(2).
AB - BACKGROUNDSTrpM, a small protein of 63 amino acids, modulates tryptophan (Trp) metabolism and morpho-physiological differentiation in the filamentous bacterium Streptomyces coelicolor A3(2), a model organism for antibiotic production and cell differentiation. Indeed, the trpM knock-out mutant strain is characterized by a delayed growth on minimal medium, smaller aerial hyphae, and reduction of both spore and antibiotic actinorhodin production in comparison with the wild-type strain. These observations were in agreement with proteomic analyses which highlighted a role for TrpM in controlling i) Trp production through Trp precursor availability and, thus ii) bacterial growth and morpho-physiological differentiation.OBJECTIVESConstruction and morpho-physiological characterization of a S. coelicolor A3(2) trpM knock-in mutant.METHODS- Construction of a trpM knock-in mutant by E. coli-S. coelicolor interspecific conjugation using the pIJ8600/trpM integrative plasmid.- Scanning Electron Microscope (SEM) analysis.- Spectrophotometric analysis and microbiological assays for evaluating antibiotic production.CONCLUSIONSA trpM knock-in mutant strain of S. celicolor A3(2) was constructed and showed an increased production of actinorhodin and spores: moreover, SEM analysis revealed an earlier formation of septa in aerial hyphae and confirmed that TrpM has a role in controlling the morpho-physiological differentiation of S. coelicolor A3(2).
UR - http://hdl.handle.net/10447/253633
UR - https://fems-microbiology.org/wp-content/uploads/2017/07/FEMS2017_abstracts-book_GS.pdf
M3 - Other
ER -