alpha helix

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alpha helix

A secondary structure of proteins, characterized by a single, spiral chain of amino acids stabilized by hydrogen bonds.

[From alpha-form, the form taken by unstretched protein molecules.]

al′pha-hel′i·cal (-hĕl′ĭ-kəl, -hē′lĭ-) adj.

alpha helix

(Biochemistry) biochem a helical conformation of a polypeptide chain, found abundantly in the structure of proteins

al′pha he′lix

the spatial configuration of many protein molecules in which the polypeptide backbone is stabilized by hydrogen bonds between amino acids in successive helical turns.
alfa uzvojnica
References in periodicals archive ?
We posit that this is one of a broader class of protein structures that we call the alpha-helical barrels.
Alphabodies are small, single-chain proteins, with a triple-stranded alpha-helical coil structure, designed by computer modeling, but inspired by naturally existing protein motifs.
The research team created a peptide with an alpha-helical shape that would fit into the active site of the calpain protease.
Two of the nine papers in this volume introduce a finer-trains-coarser multiscale methodology as a procedure for parameterization and develop example models for carbon nanotubes, fullerene polyester clusters, and the unfolding behavior of alpha-helical protein domains.
Synergism between ERalpha transactivation function 1 (AF-1) and AF-2 mediated by steroid receptor coactivator protein-1: requirement for the AF-1 alpha-helical core and for a direct interaction between the N- and C-terminal domains.
The five domains include 1) a signal peptide, 2) an alpha-helical charged domain (amino acids 1-288), 3) a proline-rich region (amino acids 289-370), 4) a choline-binding domain consisting of 9 to 10 twenty-amino-acid repeats (amino acid 371-571), and 5) a C-terminal 17-amino-acid tail (amino acids 572-589).