Hepatocyte nuclear factor 4α multiple isoforms, their functions, and their interactomes.

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Hepatocyte nuclear factor 4-alpha (HNF4α) is a crucial nuclear receptor regulating diverse biological processes.
• The HNF4A gene produces twelve distinct isoforms via alternative splicing from two promoters.
• The specific functions and regulatory mechanisms of individual HNF4α isoforms remain largely uncharacterized.

Purpose of the Study:

• To review the discoveries of HNF4α isoforms.
• To summarize the functions of the P1 and P2 HNF4α isoform subgroups.
• To highlight recent research on proteins interacting with HNF4α isoforms and their roles.

Main Methods:

• Literature review of HNF4α isoform research.
• Analysis of proteomic data identifying HNF4α-interacting proteins.
• Synthesis of current understanding of isoform-specific functions and co-regulation.

Main Results:

• Identification of twelve distinct HNF4α isoforms.
• Characterization of the P1 and P2 HNF4α isoform subgroups' functions.
• Emerging insights into isoform-specific protein interactions and their biological relevance.

Conclusions:

• Understanding HNF4α isoform diversity and interactions is key to deciphering its role in health and disease.
• Further research into protein partners will elucidate HNF4α's co-regulatory mechanisms.
• This review consolidates current knowledge and points to future research directions.