METTLing in Stem Cell and Cancer Biology

Area of Science:

• Biochemistry
• Molecular Biology
• Developmental Biology

Background:

• The methyltransferase-like (METTL) protein family comprises diverse enzymes that methylate various substrates.
• Many METTL proteins share a conserved catalytic domain and are increasingly recognized for their roles in stem cell biology.
• METTL3 and METTL14 form an m⁶A RNA methyltransferase complex with known roles in cancer.

Purpose of the Study:

• To summarize the known functions of METTL proteins in stem cell differentiation.
• To highlight the connection between METTL proteins' roles in development and oncogenesis.
• To review emerging evidence on METTL family members in stem cell pluripotency and self-renewal.

Main Methods:

• Literature review and synthesis of existing research on METTL proteins.
• Analysis of data from mouse models investigating stem cell development.
• Comparative analysis of METTL family members' functions across different stem cell types.

Main Results:

• METTL3/METTL14 are essential for embryonic, hematopoietic, and neural stem cell development.
• Other METTL family members (e.g., METTL1, METTL5, METTL11A/11B) are implicated in stem cell pluripotency, differentiation, and self-renewal.
• METTL proteins also function as translational regulators, impacting stem cell quiescence and differentiation.

Conclusions:

• METTL proteins play diverse and critical roles in regulating stem cell differentiation and development.
• The functions of METTL proteins in stem cell biology are closely linked to their established roles in cancer.
• Further research into METTL proteins offers insights into both developmental processes and oncogenesis.