Beta sheet: Difference between revisions
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==Structure, hydrogen bonding and composition== | ==Structure, hydrogen bonding and composition== | ||
</StructureSection> | </StructureSection> | ||
In a beta sheet, neighboring strands can either have a parallel or an antiparallel orientation, resulting in different hydrogen bonding pattern. The strands, if part of the same subunit, will all be connected as part of a single polypeptide. The parallel or antiparallel orientations and how strands are connected in their primary sequence is shown in topology ; these are useful to compare different protein folds. One example of such a beta sheet topology is the so-called greek key - an all-antiparallel sheet with four strands. | |||
[[Image:251px-Anthrax toxin protein key motif.svg.png]] | |||
==Connectedness or topology of beta sheets== | ==Connectedness or topology of beta sheets== | ||
==Types of proteins and folds that contain sheets== | ==Types of proteins and folds that contain sheets== | ||
