Krüppel-like factors: three fingers in control

Area of Science:

• Molecular Biology
• Genetics
• Developmental Biology

Background:

• Krüppel-like factors (KLFs) are a family of transcription factors characterized by a conserved zinc-finger DNA-binding domain.
• KLFs play crucial roles in regulating gene expression, impacting numerous cellular processes and developmental events.
• The human genome contains 17 annotated KLF genes, which, despite structural similarities, are located across the genome.

Purpose of the Study:

• To review the characteristic features, nomenclature, evolution, and functional diversity of human Krüppel-like factors.
• To highlight the broad regulatory roles of KLFs in various physiological and pathological processes.

Main Methods:

• Literature review of existing research on Krüppel-like factors.
• Analysis of structural similarities and genomic locations of KLF genes.
• Compilation of known functions and regulatory roles of different KLFs.

Main Results:

• KLFs possess a conserved C-terminal DNA-binding motif with three C2H2 zinc-finger domains and variable N-terminal regulatory domains.
• KLFs regulate a wide spectrum of biological processes including erythropoiesis, stem cell maintenance, cell proliferation, and tissue development.
• KLFs exhibit diverse functions, acting as activators and/or repressors of target genes.

Conclusions:

• Krüppel-like factors are essential regulators with diverse functions across multiple biological systems.
• Understanding KLF diversity and function is critical for insights into development, homeostasis, and disease.
• Further research into KLFs promises to uncover new therapeutic targets.