Modification of nanoscale polymeric adsorbent for the preparative separation and purification of tacrolimus from fermentation broth of Streptomyces tsukubaensis.

Tacrolimus is an important immunosuppressant produced by microbial fermentation. In this study, a modified nanoscale polymeric adsorbent, Ag-exchanged resin, was prepared and studied for the preparative separation and purification of tacrolimus from fermentation broth of Streptomyces tsukubaensis. The performance and absorption characteristics of the modified nanoscale polymeric adsorbent namely Ag-NPS was evaluated.

Identification and antimicrobial properties of a new alkaloid produced by marine-derived sp. FIM06-0036.

The actinomycete strain FIM06-0036 was isolated from marine sponge sample collected from the East China Sea and identified as sp. based upon the results of 16S rRNA sequence analysis. One new alkaloid, 2-ethylhexyl 1H-imidazole-4-carboxylate (), together with a known alkaloid butyl 1H-imidazole-4-carboxylate () was obtained from the fermentation products of this strain, the structures of compounds and were determined by their detailed analysis of 1 D, 2 D NMR and HR-ESI-MS data, along with literature data analysis.

FW0622, a new siderophore isolated from marine sp. by genomic mining.

Using the draft genome sequence of sp. FIM060022, we have identified a new desferrioxamine-like siderophore, FW0622. This is the first chemically characterized siderophore obtained from .

Isolation, purification and identification of two new alkaloids metabolites from marine-derived sp. FIM06025.

Chemical investigation of a marine-derived actinomycete strain sp. FIM06025 isolated from a marine sponge sample collected from the East China Sea, resulted in the discovery of two new alkaloids, (2-(hydroxymethyl)-3-(2-(hydroxymethyl)-3-methylaziridin-1-yl) (2-hydroxyphenyl) methanone () and 2-(1-hydroxyethyl)-3,4-dihydrobenzo [] [1,4]oxazepin-5()-one (). The structures of compounds and were determined by the detailed analysis of 1D, 2D NMR and HR-TOF-MS data, along with literature data analysis.

Pericocins A-D, New Bioactive Compounds from Periconia sp.

One new dihydroisocoumarin, pericocin A (1), one new chromone, pericocin B (2), and two new α-pyrone derivatives, pericocins C-D (3-4), together with two known compounds, 3-(2-oxo-2H-pyran-6-yl)propanoic acid (5) and (E)-3-(2-oxo-2H-pyran-6-yl)acrylic acid (6), were isolated from the culture of the endolichenic fungus Periconia sp.. Their structures were elucidated by spectroscopic methods.

Pericoterpenoid A, a new bioactive cadinane-type sesquiterpene from Periconia sp.

Pericoterpenoid A (1), a new cadinane-type sesquiterpene, was isolated from an endolichenic fungal strain Periconia sp. (No. 19-4-2-1).

Nodulisporipyrones A-D, new bioactive α-pyrone derivatives from Nodulisporium sp.

Four new α-pyrone derivatives, nodulisporipyrones A-D (1-4), were isolated from the extract of an endolichenic fungal strain Nodulisporium sp. (65-12-7-1) that was fermented with rice. The structures of 1-4 were elucidated by extensive spectroscopic analysis, and the absolute configurations were determined by modified Mosher's method and electronic circular dichroism experiments.

Compounds from marine-derived Verrucosispora sp. FIM06054 and their potential antitumour activities.

Strain FIM06054 was isolated from a marine sponge sample collected from the East China Sea and was characterised as a strain of Verrucosispora genus on the basis of its 16S rRNA gene sequence. One new compound, FW054-1 (1), together with a known aminofuran compound proximicin A (2), was isolated from the culture broth of Verrucosispora sp. FIM06054.