Cornell Researchers Discover Two Previously Unknown Alkaloids in Kratom

Why it matters

The discovery of new alkaloids expands the known chemical map of kratom, potentially revealing new compounds with therapeutic applications or safety implications that current testing protocols do not screen for.

The big picture

Kratom is known to contain 40+ alkaloids, but the full catalog of its biochemical components remains incomplete. Cornell University researchers developed a novel "interactomics-driven" approach — using large-scale protein-protein interaction screening in yeast — that goes beyond conventional transcriptomics to identify new biosynthetic enzymes and their unknown products. This preprint represents a significant methodological advance in natural product chemistry that could accelerate study of other medicinal plants.

Key findings

• Cornell screened 331 kratom genes using a high-throughput yeast-based protein interaction platform to identify enzymes involved in alkaloid biosynthesis
• Six novel medium-chain dehydrogenase/reductase enzymes (MsMDRs) were characterized as interaction partners of a key kratom biosynthetic enzyme, expanding the known enzyme catalog
• These novel enzymes produce a previously unreported alkaloid named "charlamine," confirmed present in actual kratom leaf and root samples by mass spectrometry
• A second new compound, "vallesiachotaminol," was also identified and confirmed in kratom stem and leaf samples
• The study identified a 320-kilobase biosynthetic gene cluster in the kratom genome linking multiple alkaloid-producing enzymes in a spatial organization not previously described

What they say

"Interactomics-driven enzyme screening provides a viable strategy for plant natural product biosynthetic pathway discovery, which can capture the spatial organization of pathway enzymes, complementing conventional prediction methods based on transcriptomics and genomics." — Yang et al., Cornell University, 2026

Bottom line

**Cornell University researchers discovered two entirely new kratom alkaloids — charlamine and vallesiachotaminol — using a novel protein-interaction screening approach, revealing that kratom's chemistry is more complex than previously known.**