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Potassium Channel 3d printed

Not a Photo

Full Color Sandstone
Potassium Channel 3d printed
Potassium Channel 3d printed

Not a Photo

Potassium Channel

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3D printed in fully colored material with a coarse finish and a delicate feel.
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Product Description
Ion transport proteins must remove an ion's hydration shell to coordinate the ion selectively on the basis of its size and charge. To discover how the K+ channel solves this fundamental aspect of ion conduction, we solved the structure of the KcsA K+ channel in complex with a monoclonal Fab antibody fragment at 2.0 A resolution. Here we show how the K+ channel displaces water molecules around an ion at its extracellular entryway, and how it holds a K+ ion in a square antiprism of water molecules in a cavity near its intracellular entryway. Carbonyl oxygen atoms within the selectivity filter form a very similar square antiprism around each K+ binding site, as if to mimic the waters of hydration. The selectivity filter changes its ion coordination structure in low K+ solutions. This structural change is crucial to the operation of the selectivity filter in the cellular context, where the K+ ion concentration near the selectivity filter varies in response to channel gating. 
What's in the box:
Potassium Channel
4.6 x 4.6 x 4.57 cm
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1.81 x 1.81 x 1.8 inches
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Mature audiences only.
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