Mitochondria Penetrating Peptide-Conjugated TAMRA for Live-Cell Long-Term Tracking

Tinghan Zhao, Xinglei Liu, Sweety Singh, Xiangshan Liu, Yuanwei Zhang, Junko Sawada, Masanobu Komatsu, Kevin D. Belfield

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Mitochondria are essential targets for treatment of diseases with mitochondrial disorders such as diabetes, cancer, and cardiovascular and neurodegenerative diseases. Mitochondria penetrating peptides (MPPs) are composed of cationic and hydrophobic amino acids that can target and permeate the mitochondrial membrane. Herein, a novel d-argine-phenylalanine-d-argine-phenylalanine-d-argine-phenylalanine-NH2 (rFrFrF) was tagged with a rhodamine-based fluorescent chromophore (TAMRA). This probe (TAMRA-rFrFrF) exhibited advantageous properties for long-term mitochondria tracking as demonstrated by fluorescence microscopy. Cell viability assays and oxygen consumption rates indicate low cytotoxicity and high biocompatibility of the new contrast agent. Colocalization studies suggest that TAMRA-rFrFrF is a promising candidate for continuous mitochondrial tracking for up to 3 days.

Original languageEnglish (US)
Pages (from-to)2312-2316
Number of pages5
JournalBioconjugate Chemistry
Issue number9
StatePublished - Sep 18 2019

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering
  • Pharmacology
  • Pharmaceutical Science
  • Organic Chemistry


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