alpha_helix

Term ID

SO:0001117

Synonyms

• a-helix
• helix

Definition

The helix has 3.6 residues per turn which corresponds to a translation of 1.5 angstroms (= 0.15 nm) along the helical axis. Every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier.

References

• http://en.wikipedia.org/wiki/Alpha_helix

Ontology

Sequence Ontology