Results 21 to 30 of about 3,824 (213)

Diketopiperazine Gels: New Horizons from the Self-Assembly of Cyclic Dipeptides

open access: yesMolecules, 2021
Cyclodipeptides (CDPs) or 2,5-diketopiperazines (DKPs) can exert a variety of biological activities and display pronounced resistance against enzymatic hydrolysis as well as a propensity towards self-assembly into gels, relative to the linear-dipeptide ...
Marco Scarel, Silvia Marchesan
doaj   +1 more source

Cyclic Dipeptides: The Biological and Structural Landscape with Special Focus on the Anti-Cancer Proline-Based Scaffold

open access: yesBiomolecules, 2021
Cyclic dipeptides, also know as diketopiperazines (DKP), the simplest cyclic forms of peptides widespread in nature, are unsurpassed in their structural and bio-functional diversity. DKPs, especially those containing proline, due to their unique features
Joanna Bojarska   +11 more
doaj   +1 more source

Probing Anti-Leukemic Metabolites from Marine-Derived Streptomyces sp. LY1209

open access: yesMetabolites, 2022
The unmet need for specific anti-leukemic agents for the treatment of acute lymphoblastic leukemia led us to screen a variety of marine-derived bacteria. The fermentation broth extract of Streptomyces sp.
You-Ying Chen   +11 more
doaj   +1 more source

New Tripeptide Derivatives Asterripeptides A–C from Vietnamese Mangrove-Derived Fungus Aspergillus terreus LM.5.2

open access: yesMarine Drugs, 2022
Three new tripeptide derivatives asterripeptides A–C (1–3) were isolated from Vietnamese mangrove-derived fungus Aspergillus terreus LM.5.2. Structures of isolated compounds were determined by a combination of NMR and ESIMS techniques.
Elena V. Girich   +9 more
doaj   +1 more source

Design, Synthesis and Evaluation of 2,5-Diketopiperazines as Inhibitors of the MDM2-p53 Interaction. [PDF]

open access: yesPLoS ONE, 2015
The transcription factor p53 is the main tumour suppressor in cells and many cancer types have p53 mutations resulting in a loss of its function. In tumours that retain wild-type p53 function, p53 activity is down-regulated by MDM2 (human murine double ...
Mariell Pettersson   +8 more
doaj   +1 more source

Influence of Open Chain and Cyclic Structure of Peptidomimetics on Antibacterial Activity in E. coli Strains

open access: yesMolecules, 2022
An efficient method for the synthesis of functionalized peptidomimetics via multicomponent Ugi reaction has been developed. The application of trifluoroethanol (TFE) as a reaction medium provided desired products with good yields.
Parul Sahrawat   +6 more
doaj   +1 more source

Inhibitory Effect of Three Diketopiperazines from Marine-derived Bacteria on Secretory Group IIA Phospholipase A2

open access: yesNatural Product Communications, 2016
Diketopiperazines, natural products found in bacteria, fungi, marine sponges, gorgonian and red algae, are cyclic dipeptides possessing relatively simple and rigid structures with chiral nature and various side chains.
Hyukjae Choi, Sae-Kwang Ku, Jong-Sup Bae
doaj   +1 more source

New Eremophilane-Type Sesquiterpenes from the Marine Sediment-Derived Fungus Emericellopsis maritima BC17 and Their Cytotoxic and Antimicrobial Activities

open access: yesMarine Drugs, 2023
The fungal strain BC17 was isolated from sediments collected in the intertidal zone of the inner Bay of Cadiz and characterized as Emericellopsis maritima.
Jorge R. Virués-Segovia   +10 more
doaj   +1 more source

New Metabolites from the Marine Sponge Scopalina hapalia Collected in Mayotte Lagoon

open access: yesMarine Drugs, 2022
The biological screening of 44 marine sponge extracts for the research of bioactive molecules, with potential application in the treatment of age-related diseases (cancer and Alzheimer’s disease) and skin aging, resulted in the selection of Scopalina ...
Charifat Saïd Hassane   +13 more
doaj   +1 more source

Synthesis of the New Ring System Bispyrido[4',3':4,5]pyrrolo [1,2-a:1',2'-d]pyrazine and Its Deaza Analogue

open access: yesMolecules, 2014
Derivatives of the new ring systems bispyrido[4',3':4,5]pyrrolo[1,2-a:1',2'-d] pyrazine-6,13-dione and its deaza analogue pyrido[4'',3'':4',5']pyrrolo-[1',2':4,5]pyrazino [1,2-a]indole-6,13-dione were conveniently synthesized through a four-step sequence.
Barbara Parrino   +6 more
doaj   +1 more source

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