Antiparallel beta-sheets are a type of secondary protein structure where adjacent beta strands run in opposite directions, providing stability through hydrogen bonds between the carbonyl oxygen of one strand and the amide hydrogen of the adjacent strand. This arrangement allows for optimal hydrogen bonding geometry, making antiparallel beta-sheets more stable than parallel beta-sheets.

Antiparallel Beta-sheet

Antiparallel beta-sheets

secondary protein structure

beta strands

opposite directions

Hydrogen bonds are a type of weak chemical bond that forms when a hydrogen atom, already covalently bonded to a more electronegative atom like oxygen or nitrogen, experiences attraction to another electronegative atom within the vicinity. They play a crucial role in determining the structure and properties of water, proteins, and nucleic acids, thereby influencing numerous biological and chemical processes.

hydrogen bonds

carbonyl oxygen

amide hydrogen

adjacent strand

hydrogen bonding geometry

Stability refers to the ability of a system or entity to maintain its state or return to it after a disturbance, ensuring continuity and predictability over time. It is a fundamental characteristic sought in various fields such as physics, economics, and social sciences, where it implies resilience and equilibrium.

stability

parallel beta-sheets

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