226956-06-5

Unguisin A is a cyclic heptapeptide originally isolated from the marine fungus E. unguis whose structure is comprised of amino acids and GABA.¹ It binds to phosphate, pyrophosphate, and chloride but has no effect on chloride transport in a liposome-based assay.² It exhibited moderate antibacterial activity against S. aureus and V. parahaemolyticus in one assay but no activity against a variety of bacteria, including S. aureus, in another.^1,2

Unguisin A s a cyclic peptides that can be isolated from the marine-derived fungus Emericella unguis[1].

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1. Malmstrom, J. Unguisins A and B: New cyclic peptides from the marine-derived fungus Emericella unguis J. Nat. Prod. 62(5),787-789(1999).
2. Ariawan, A.D., Webb, J.E.A., Howe, E.N.W., et al. Cyclic peptide unguisin A is an anion receptor with high affinity for phosphate and pyrophosphate Org. Biomol. Chem. 15(14),2962-2967(2017).