Signalling assemblies: the odds of symmetry.

Area of Science:

• Biochemistry
• Structural Biology
• Cellular Signaling

Background:

• Protein complexes are essential for biological signaling pathways.
• Symmetry is prevalent in experimentally determined protein complex structures, particularly homomers.
• Asymmetric structures exist and transient asymmetry is difficult to study using traditional methods.

Purpose of the Study:

• To investigate the functional roles of symmetry and asymmetry in protein complexes within cellular signaling.
• To focus on key signaling assemblies like receptors, transcription factors, and transmembrane channels.
• To highlight the significance of asymmetry in signaling function and cellular states.

Main Methods:

• Exploration of existing structural data on protein complexes.
• Analysis of symmetry and asymmetry in various signaling protein families.
• Review of literature on the functional implications of protein complex structures.

Main Results:

• Symmetry is a dominant feature in many protein complexes.
• Asymmetric protein complex structures are observed and play crucial roles.
• Asymmetry is frequently associated with activated signaling states.

Conclusions:

• Protein complex asymmetry is critical for cellular signaling function.
• Understanding symmetry and asymmetry has potential applications in pharmacology and disease research.
• Further investigation into transient asymmetric states is warranted.