7TM receptors: the splicing on the cake.

Area of Science:

• Molecular Biology
• Pharmacology
• Genetics

Background:

• Functional diversity in seven transmembrane (7TM) receptors typically arises from multiple receptor subtypes encoded by distinct genes.
• Introns within 7TM receptor genes allow for alternative splicing, creating diverse messenger RNAs (mRNAs) and distinct receptor isoforms.
• A significant number of 7TM receptor splice variants have been identified.

Purpose of the Study:

• To review current data on alternatively spliced variants of hormone and neurotransmitter 7TM receptors.
• To consider the potential physiological importance of these splice variants.
• To address issues related to the classification and nomenclature of receptor isoforms generated by alternative splicing.

Main Methods:

• Literature review of existing studies on 7TM receptor splice variants.
• Analysis of data concerning hormone and neurotransmitter receptors.
• Discussion of physiological implications and classification challenges.

Main Results:

• Alternative splicing is a significant source of functional diversity in 7TM receptors, beyond gene duplication.
• Numerous alternatively spliced variants of hormone and neurotransmitter 7TM receptors have been identified.
• The physiological roles and precise classification of these isoforms require further investigation.

Conclusions:

• Alternative splicing significantly expands the functional repertoire of 7TM receptors.
• Understanding these splice variants is crucial for comprehending receptor signaling and developing targeted therapeutics.
• Standardized nomenclature is needed for accurately describing receptor isoforms arising from alternative splicing.