The Advancement of Peptides Derived from Kitasatospora.

Kitasatospora continue to be a rich source of chemically diverse and bioactive peptide natural products. This review highlights two strategies in peptide natural products research of Kitasatospora, 1) natural product-first approach guided by a major compound, biological activity or genomic analysis, and 2) enzyme-first approach guided by bioinformatic tools to construct a sequence similarity network for the discovery of biosynthetic enzymes. The structures of peptides, biosynthetic origins of unique building blocks, recent reports of post-translational modifying enzymes for constructing these peptides, and knowledge gap in biosynthesis will also be presented.

Boron- and Oxygen-Doped π-Extended Helical Nanographene with Circularly Polarised Thermally Activated Delayed Fluorescence.

Helical nanographenes have garnered substantial attention owing to their finely adjustable optical and semiconducting properties. The strategic integration of both helicity and heteroatoms into the nanographene structure, facilitated by a boron-oxygen-based multiple resonance (MR) thermally activated delayed fluorescence (TADF), elevates its photophysical and chiroptical features. This signifies the introduction of an elegant category of helical nanographene that combines optical (TADF) and chiroptical (CPL) features.

anticancer evaluation of Enceleamycin A and its underlying mechanism.

It has become more crucial than ever to find novel anticancer compounds due to the rise in cancer mortality and resistance to the present chemotherapeutic drugs. Naphthoquinones are regarded as privileged structures for their ability to inhibit various cancers. The current study examined three novel furo-naphthoquinones (Enceleamycins A-C) previously isolated from sp.

Enceleamycins A-C, Furo-Naphthoquinones from sp. MCC0218: Isolation, Structure Elucidation, and Antimicrobial Activity.

Three novel furo-naphthoquinones, enceleamycins A-C (-), and a new -hydroxypyrazinone acid () were identified from the strain sp. MCC 0218, isolated from a soil sample collected from the Western Ghats of India. Their chemical structure and absolute and relative configurations were established by 1D and 2D NMR spectroscopy, single-crystal X-ray crystallography, and high-resolution mass spectrometry.

Insights from a Pan India Sero-Epidemiological survey (Phenome-India Cohort) for SARS-CoV2.

To understand the spread of SARS-CoV2, in August and September 2020, the Council of Scientific and Industrial Research (India) conducted a serosurvey across its constituent laboratories and centers across India. Of 10,427 volunteers, 1058 (10.14%) tested positive for SARS-CoV2 anti-nucleocapsid (anti-NC) antibodies, 95% of which had surrogate neutralization activity.

Approach to nigericin derivatives and their therapeutic potential.

A new nigericin analogue that has been chemically modified was synthesized through a fluorination process from the parent nigericin, produced from a novel strain DASNCL-29. Fermentation strategies were designed for the optimised production of nigericin molecule and subjected for purification and structural analysis. The fermentation process resulted in the highest yield of nigericin (33% (w/w)).

Total synthesis of (-)-2-methoxy-2-butenolide-3-cinnamate and its antimicrobial potentials.

The first total synthesis of (-)-2-methoxy-2-butenolide-3-cinnamate (butenolide cinnamate) was achieved using commercially available starting material. The synthesized compound was found to have promising antibacterial activity against Gram-negative strains (ATCC 8739), (ATCC 23564) and (ATCC 19154) with a minimum inhibitory concentration of 2.0 µg/mL, 1.