Which bacterium produces the antibiotic vancomycin in soil ecosystems?

Amycolatopsis orientalis produces the antibiotic vancomycin in soil ecosystems.

Vancomycin is a glycopeptide antibiotic that blocks bacterial cell-wall construction by binding to a molecular building block ending in D-alanyl-D-alanine. This mechanism is especially effective against many Gram-positive bacteria, whose exposed cell walls are accessible to the drug.

The organism was originally known under different names, including Streptomyces orientalis, before classification placed it in the genus Amycolatopsis. Vancomycin was discovered in the 1950s from a soil microorganism isolated from a sample associated with Borneo.

Vancomycin became especially important for treating serious infections caused by resistant Gram-positive bacteria, including some methicillin-resistant Staphylococcus aureus strains. Resistance can arise when bacteria alter the drug’s binding target, as in vancomycin-resistant enterococci. The producing bacterium and the antibiotic must therefore be distinguished from the pathogens the medicine treats.