Direct intracellular detection of biomolecule specific bound-water with Raman spectroscopy

Ashok Zachariah Samuel*, Kaori Sugiyama, Haruko Takeyama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Lipids, proteins, and nucleic acids have closely associated water molecules (Bound water), which exhibit considerably different physical properties compared to bulk water. Here we investigate the possibility of resolving Raman spectra of the specific hydration shell of these biomolecules in intracellular regions using Raman imaging. Lipids and proteins + nucleic acids Raman spectral components resolved in the analysis showed associated water spectral features, which are uniquely different from that of bulk water. These spectral profiles agree with water spectral profile observed in the case of corresponding hydrated pure biomolecules. The results show the prospects of Raman imaging in examining intracellular hydration in biomolecules and its functional relation.

Original languageEnglish
Article number121870
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume285
DOIs
Publication statusPublished - 2023 Jan 15

Keywords

  • Biomolecule correlated water
  • Intracellular hydration
  • Multivariate curve resolution
  • Raman imaging
  • Single cell imaging

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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