Name: Calpinactam
Brand: Biolinks K.K.
SKU: BLK-1100
Price: 270.00 USD
Availability: InStock

For Research Use Only. Not for human or veterinary use.

Calpinactam (CAS: 1205538-83-5) Product ID: BLK-1100 CAS 1205538-83-5 Mechanism Antimycobacterial peptide Primary Target Not identified (Mycobacterium-selective activity) Pathway Mycobacterial growth inhibition
Structure	View full structure page Chemical structure of Calpinactam (CAS 1205538-83-5)
CAS	1205538-83-5
Molecular Formula	C38H57N9O8
Molecular Weight	767.93
Price	1mg: USD 270.00 / 5mg: - / 25mg: -
Storage	-20°C
Solubility	1mg/ml ethanol, methanol, DMSO
Purity	>95% [View LC/UV Data]
LC/UV	Representative LC/UV chromatogram under typical analytical conditions (C18 column; mobile phase: 5–100% ACN / H2O (0.05% H3PO4), linear gradient 20 min; flow rate: 0.2 mL/min; detection: 210 nm).
NMR Spectral Data	Representative 1H NMR (500 MHz) spectrum confirming the structure of Calpinactam. Representative 13C NMR (125 MHz) spectrum supporting structural assignment of Calpinactam.
Summary	Calpinactam is a fungal hexapeptide active against Mycobacterium species.
Details	Calpinactam is a fungal hexapeptide metabolite isolated from Mortierella alpina FKI-4905. Structurally, it contains a unique C-terminal caprolactam ring and was characterized by detailed NMR analysis and total synthesis. Calpinactam exhibits selective antimycobacterial activity, inhibiting the growth of Mycobacterium smegmatis and Mycobacterium tuberculosis with low-micromolar MIC values while showing minimal activity against other bacteria and fungi. Biosynthetic studies revealed that calpinactam is produced by a large nonribosomal peptide synthetase (NRPS), and heterologous expression systems have enabled its production from long fungal biosynthetic genes.
Browse Related	Mechanism Antimycobacterial peptide Open full index Primary Target Not identified (Mycobacterium-selective activity) Open full index Pathway Mycobacterial growth inhibition Open full index Chemical Class NRPS-derived hexapeptide Open full index
Mechanism	Antimycobacterial peptide
Primary Target	Not identified (Mycobacterium-selective activity)
Pathway	Mycobacterial growth inhibition
Chemical Class	NRPS-derived hexapeptide
Discovery Year	2010
Keywords	antimycobacterial peptide hexapeptide natural product caprolactam-containing peptide mycobacterium tuberculosis inhibitor nonribosomal peptide synthetase product mortierella metabolite anti-tuberculosis lead compound
References	Ishikawa et al., Org Lett, 2009 DOI: 10.1021/ol902553z Ishikawa et al., J Antibiot, 2010 DOI: 10.1038/ja.2010.14 Geib et al., Fungal Biol Biotechnol, 2023 DOI: 10.1186/s40694-023-00152-3
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Representative LC/UV Data HPLC Conditions (typical): Column: C18 Mobile phase: 5–100% ACN / H2O (0.05% H3PO4), linear gradient 20 min Flow rate: 0.2 mL/min Detection: 210 nm Representative analytical data. Actual batch data may vary.

Calpinactam (CAS: 1205538-83-5)