Toward Intracellular Bioconjugation Using Transition-Metal-Free Techniques

Area of Science:

• Chemical Biology
• Biochemistry
• Organic Chemistry

Background:

• Bioconjugation, the covalent modification of biomolecules, has advanced significantly since the 20th century.
• Current bioconjugation methods face limitations in studying live cellular processes due to conflicts with cellular functions.
• Transition metal catalysts, while effective, are restricted to in vitro or cell-surface applications.

Purpose of the Study:

• To review and analyze the applicability of transition-metal-free bioconjugation strategies for in vivo biochemical studies.
• To assess the potential and challenges of metal-free approaches in live cellular environments.
• To evaluate strategies reported in the current decade for their in vivo suitability.

Main Methods:

• Literature review of transition-metal-free bioconjugation strategies published in the last decade.
• Analysis of reaction mechanisms and their compatibility with intracellular environments.
• Assessment of biocompatibility and potential perturbations of biological processes.

Main Results:

• Transition-metal-free strategies offer a promising alternative to overcome limitations of metal-catalyzed bioconjugation in vivo.
• The biocompatibility of metal-free modifications is a critical factor, as biological systems are sensitive to environmental changes.
• Careful consideration of the inter- and intracellular environment is necessary for successful in vivo application.

Conclusions:

• Metal-free bioconjugation strategies hold significant potential for advancing the study of biochemical processes in vivo.
• Further research is needed to optimize metal-free reactions for enhanced biocompatibility and minimal perturbation of cellular functions.
• The development of robust and biocompatible metal-free bioconjugation techniques is crucial for future live-cell imaging and biochemical studies.