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| + | {{tag>beta}} | ||
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| + | ====== Beta Propellor ======= | ||
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| + | This fold comprises 4, 6, 7 or 8 antiparallel beta sheets with a radial arrangement in space, giving the overall structure the appearance of a propellor. The beta sheets | ||
| + | pack face to face, and form a closed structure, in which each beta sheet packs against | ||
| + | two neighbours. The sheets have a mean twist and orientation that depends on the | ||
| + | number of beta sheets that form the propellor. The beta sheets have the same topology, | ||
| + | i.e. the propellor blades are structurally similar units (four antiparallel strands | ||
| + | with +1, +1, +1 connectivity). | ||
| + | An example of a six-bladed beta propellor is neuraminidase (CATH domain ID 1nscA00). | ||
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| + | {{cath:feature>1nscA00}} | ||
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| + | ===== References ===== | ||
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| + | {{pubmed>long:1409568}} | ||
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