Raman Characterization of Fungal DHN and DOPA Melanin Biosynthesis Pathways Academic Article uri icon

abstract

  • Fungal melanins represent a resource for important breakthroughs in industry and medicine, but the characterization of their composition, synthesis, and structure is not well understood. Raman spectroscopy is a powerful tool for the elucidation of molecular composition and structure. In this work, we characterize the Raman spectra of wild-type Aspergillus fumigatus and Cryptococcus neoformans and their melanin biosynthetic mutants and provide a rough “map” of the DHN (A. fumigatus) and DOPA (C. neoformans) melanin biosynthetic pathways. We compare this map to the Raman spectral data of Aspergillus nidulans wild-type and melanin biosynthetic mutants obtained from a previous study. We find that the fully polymerized A. nidulans melanin cannot be classified according to the DOPA pathway; nor can it be solely classified according to the DHN pathway, consistent with mutational analysis and chemical inhibition studies. Our approach points the way forward for an increased understanding of, and methodology for, investigating fungal melanins.

published proceedings

  • Journal of Fungi

altmetric score

  • 2.35

author list (cited authors)

  • Strycker, B. D., Han, Z., Bahari, A., Pham, T., Lin, X., Shaw, B. D., Sokolov, A. V., & Scully, M. O.

citation count

  • 2

complete list of authors

  • Strycker, Benjamin D||Han, Zehua||Bahari, Aysan||Pham, Tuyetnhu||Lin, Xiaorong||Shaw, Brian D||Sokolov, Alexei V||Scully, Marlan O

publication date

  • October 2021