Geministatin B
Geministatin B is a potent antibiotic that can be found in the fungus Austroacremonium gemini MST-FP2131. Geministatin B exhibits antibacterial activity against Gram-positive bacteria including Bacillus subtilis, Staphylococcus aureus, and methicillin-resistant S. aureus (MRSA). Geministatin B can be used for the research of bacterial infections.
Nur für Forschungszwecke. Wir verkaufen nicht an Patienten.
- Formel: C32H42O7
- Molecular Weight:538.67
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Speicherung:
Please store the product under the recommended conditions in the Certificate of Analysis.
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Biologische Aktivität
Beschreibung
In Vitro
Geministatin B exhibits potent antibacterial activity against Bacillus subtilis (MIC = 0.39 µg/mL), Staphylococcus aureus (MIC = 3.1 µg/mL), and MRSA (MIC = 1.6 µg/mL)[1].
Geministatin B shows no antifungal activity against Saccharomyces cerevisiae with MIC > 200 µg/mL[1].
Geministatin B shows low cytotoxicity against mouse myeloma NS-1 cells (IC50 = 93 µM) and neonatal foreskin fibroblast cells (IC50 >190 µM)[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only. Further protocols information, click here.
Chemical Information
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Molecular Weight 538.67
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Formel C32H42O7
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SMILES
O=C(OC1=CC(O)=C(C(O)=O)C(C)=C1)C2=C(CCCCCCC/C=C\C/C=C\CCCCC)C=C(O)C=C2O
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Structure Classification
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Initial Source
Austroacremonium gemini
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Versand
Room temperature in continental US; may vary elsewhere.
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Speicherung
Please store the product under the recommended conditions in the Certificate of Analysis.
Protokoll
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Research Protocol for Infectious Diseases
Infectious-disease experiments test how pathogens interact with host barriers, innate immune receptors, inflammatory signaling, pathogen replication, and tissue injury; pattern-recognition receptors such as TLRs, RIG-I-like receptors, NOD-like receptors, and inflammasomes detect microbial molecules and activate NF-κB, interferon, and cytokine responses. The central hypothesis is that infection severity reflects the balance between pathogen burden and host response: protective inflammation restricts pathogen growth, whereas excessive or mislocalized inflammation contributes to tissue damage and disease phenotype. Unresolved questions include which host pathways are protective versus pathogenic, why some infection models fail to translate to human disease, and which combined readouts best predict clinically relevant infection outcomes.
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Gram Staining of Tissue Sections
Gram staining of tissue sections is a histochemical technique used to differentiate Gram-positive and Gram-negative bacteria within histological specimens based on differences in bacterial cell wall structure and dye retention, adapted from classical bacteriological Gram staining into tissue-compatible “histological Gram stain” variants. In tissue applications, modifications of the Brown-Hopps and Brown-Brenn methods are commonly used to improve differentiation of microorganisms embedded within host connective tissue and to reduce overstaining or loss of Gram-negative signal, which are known limitations of earlier approaches. The principle relies on crystal violet-iodine complex retention in Gram-positive organisms and subsequent decolorization and counterstaining steps that allow contrast visualization of Gram-negative organisms against tissue background.
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Bacterial live/dead nucleic-acid viability staining
The LIVE/DEAD bacterial viability staining method is based on differential permeability of nucleic-acid-binding fluorescent dyes, most commonly SYTO 9 and propidium iodide (PI), which enables discrimination of bacterial populations with intact versus compromised cytoplasmic membranes. SYTO 9 penetrates both intact and damaged bacterial membranes and binds nucleic acids to produce green fluorescence, whereas propidium iodide penetrates only cells with compromised membranes and fluoresces red while also reducing SYTO 9 signal through competitive binding and fluorescence interactions. The resulting fluorescence pattern is interpreted as a proxy for membrane integrity, which is widely used as an indicator of bacterial viability in microscopy, flow cytometry, and spectroscopic platforms. However, mechanistic studies show that SYTO 9 and PI interactions involve displacement and fluorescence resonance energy transfer effects, which can influence signal interpretation depending on dye ratios a
Reinheit & Dokumentation
Verweise
Calculators
Konzentration (Stammlösung) × Volumen (Stammlösung) = Konzentration (Ziellösung) × Volumen (Ziellösung)
Geministatin B Related Classifications
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