Evidence mapPaperPMID 42154363Full record

ArticleAMB Express2026

Genomic and spectroscopic analysis for antimicrobial metabolite profiling of Microbacterium testaceum endophyte.

Merihan S Sabra, Amr S Bishr, Lina Jamil M Abdel-Hafez, Ahmed M Elissawy, Khaled M Aboshanab

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Article in AMB Express, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Merihan S SabraDepartment of Microbiology and Immunology, Faculty of Pharmacy, October 6 University, Giza, 12585, Egypt.
Amr S BishrDepartment of Microbiology and Immunology, Faculty of Pharmacy and Drug Technology, Egyptian Chinese University, Cairo, 11786, Egypt.
Lina Jamil M Abdel-HafezDepartment of Microbiology and Immunology, Faculty of Pharmacy, October 6 University, Giza, 12585, Egypt.
Ahmed M ElissawyDepartment of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt.
Khaled M AboshanabDepartment of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt. aboshanab2012@pharma.asu.edu.eg.ORCID http://orcid.org/0000-0002-7608-850X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Wild plants harbor distinct endophytes that produce potent antimicrobial metabolites that can be used to combat life-threatening pathogens. In our study, four bacterial endophytes (LP1, LP2, LP3, LP4) were isolated from the inner tissues of leaves of Pluchea dioscoridis (L.) DC (Barnûf). The antimicrobial activity of the respective extracts (P1, P2, P3, and P4) against standard, multidrug-resistant (MDR), and Candida albicans was determined using the cup agar diffusion method. The P4 extract showed broad-spectrum activity against all tested pathogens and promising antiviral activity. The endophytic bacterium LP4 was microscopically and genomically identified by whole-genome sequencing (WGS) as Microbacterium testaceum (M. testaceum) strain CCASU-2025-88. The extract of endophytic M. testaceum CCASU-2025-88 (LP4) exhibited broad-spectrum antimicrobial activity against standard and multidrug-resistant pathogens as well as antiviral activity against Adenovirus 7, Herpes Simplex Virus 1, and Herpes Simplex Virus 2, and cytotoxic activity with a non-toxic concentration of 7.32 μg/mL, reflecting the promising bioactive properties of LP4 metabolites. Chemical profiling using AntiSMASH and LC-ESI-MS analysis suggested the presence of a compound putatively identified as microansamycin B; however, this assignment remains tentative, since the compound exhibits potent antibacterial activity, and it demonstrates the bioactive potential of M. testaceum metabolites. In conclusion, M. testaceum strain CCASU-2025-88 is a potential source of microansamycin B-like compound based on LC-ESI-MS evidence. This is the first report investigating the production of microansamycin B by a locally isolated endophytic bacterium, M. testaceum CCASU-2025-88. Further studies are recommended to optimize its production and isolation in a pure form.

Indexed as

EndophyteLC–ESI–MSMicrobacterium testaceumPluchea dioscoridisWhole genome sequencing

Identifiers

PMID42154363
PMCPMC13187077

What Socratic holds

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.