SUPERFOLDS

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5-tile codes are roughly divided into four groups:

mainly-helix 5-tile codes {DUDUD},
mainly-sheet 5-tile codes {DDDDD},
mainly-turn 5-tile codes {UUDUU, UUDUD, DUDUU},
others {UDDDD, DDDDU, ...}.

In the following figures,

the CA atoms of amino-acids of 5-tile code DUDUD are coloured red,
the CA atoms of amino-acids of 5-tile code DDDDD are coloured blue (small sphere),
the CA atoms of amino-acids of 5-tile code UUDUU are coloured yellow,
the CA atoms of amino-acids of 5-tile code UUDUD or DUDUU are coloured orange,
the CA atoms of amino-acids of 5-tile code UDDDD are coloured green.

(1) Globin-like (1thb A) 5-tile code	(2) Up-down (256b A) 5-tile code	(3) alpha-beta-plait (1aps) 5-tile code
(4) UB rolls (1ubq) 5-tile code	(5) Doubly wound (2fox) 5-tile code	(6) TIM Barrel (7tim A) 5-tile code
(7) Trefoil (1i1b) 5-tile code	(8) Jelly roll (2buk) 5-tile code	(9) IG-like (2rhe) 5-tile code

[Note] Click the images to view larger images.

[References]

C.A. Orengo, D.T. Jones, and J.M. Thornton, Protein superfamilies and domain superfolds. Nature 372, 631-634 (1994).
W. Kabsh and C. Sander, Dictionary of protein secondary structure: pattern recognition of hydrogen-bonded and geometrical features. Biopolymers 22, 2577-2637 (1983).