Supersecondaries structures

Supersecondaries structures well know as motifs or themes (from portuguese temas ou motivos ), consist in many combinations of secondaries structures. Supersecondaries units may play one particular hole or occur as portion of one major functional unit, called as domain.

Supersecondaries structures examples are the units formed by r helix-loop-helix two helixes alfa jointed by one loop beta-alfa-beta unit two beta strands jointed to one helix alfa one helix alfa intermediate between two loops, "hair pin" two beta strands antiparallel jointed by one "clinch", and "rule key" one structure which joints four or more antiparallel strands.

Proteins which have regular recurrence of helixes alfa and beta strands, have tendency to arise compact domains to allow one efficient folding process.

The mio-hemeritrina, one oxigen binding protein in worms, has one bunch of four helixes. Its compactation molds the supersecondary structure shown bellow: Este browser não pode abrir o arquivo desejado.<br>Sugerimos a utilização do Explorer 3.0 ou Navigator 3.0

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