Nourseothricin sulfate  (Synonyms: Streptothricin sulfate)

Nourseothricin sulfate (Streptothricin sulfate) is a broad-spectrum antibiotic that destroys the outer membrane of Gram-negative bacteria and is a dominant selective marker for Fonsecaea pedrosoi^[1][2]. Nourseothricin sulfate inhibits protein biosynthesis in prokaryotic cells and strongly inhibits the growth of eukaryotes like fungi and can also be used as a elective marker for a wide range of organisms including bacteria, yeast, filamentous fungi, and plant cells^[3].

Escherichia coli resistance to neurosporin can be sensitive to resistant strains by eliminating their outer membrane resistance. The polycationic antibiotic, Nourseothricin, represents a mixture of several Streptothricins, mainly D and F. Obviously, although very slowly, it can pass the outer membrane via the porin pores. It has been shown earlier that Nourseothricin is able to generate some kind of channels into the outer membrane through which it can pass the cell wall. On the other hand, there are indications that resistant strains containing a Nourseothricin-inactivating acetyl transferase possess an additional protecting system, namely a reduced penetrability of the outer membrane^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Nourseothricin is preferentially excreted via kidney and signs of nephrotoxicity can be observed after its administration. Renal handling of Nourseothricin is characterized in experiments on renal cortical slices under various experimental conditions. Following administration in vivo the renal tubular transport system for organic anions (p-aminohippurate, PAH) is not influenced by Nourseothricin. There is a high degree of accumulation of Nourseothricin in renal cortical slices. In contrast to PAH accumulation there is no influence of nitrogen atmosphere, simultaneous administration of PAH, probenecid or trishydroxyaminomethane on Nourseothricin accumulation. Age dependent differences in Nourseothricin accumulation does not exist^[4].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

1359.47

C₅₀H₉₄N₂₀O₂₂S

96736-11-7

Solid

White to off-white

NC(O[C@H]1[C@@H](CO)O[C@@H](NC(N2)=N[C@]([C@@]2([H])[C@H](O)CN3)([H])C3=O)[C@H](NC(C[C@@H](N)CCCN(C(C[C@@H](N)CCCNC(C[C@@H](N)CCCN)=O)=O)[H])=O)[C@@H]1O)=O.O=S(O)(O)=O.NC(O[C@H]4[C@@H](CO)O[C@@H](NC(N5)=N[C@]([C@@]5([H])[C@H](O)CN6)([H])C6=O)[C@H](NC(C[C@@H](N)CCCN)=O)[C@@H]4O)=O

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

• [1]. Seltmann G. et al. Resistance of Escherichia coli to nourseothricin (streptothricin): sensitization of resistant strains by abolition of its outer membrane resistance. Zentralbl Bakteriol. 1992 Jan;276(2):143-51.  [Content Brief]

  [2]. Florencio CS, et al. Genetic manipulation of Fonsecaea pedrosoi using particles bombardment and Agrobacterium mediated transformation. Microbiol Res. 2018 Mar;207:269-279.  [Content Brief]

  [3]. Suárez-Moreno ZR, et al. Plant-Growth Promotion and Biocontrol Properties of Three Streptomyces spp. Isolates to Control Bacterial Rice Pathogens.. Front Microbiol. 2019 Feb 25;10:290.  [Content Brief]

  [4]. Bräunlich H, et al. Renal handling of nourseothricin. Pharmazie. 1988 Mar;43(3):200-2.  [Content Brief]