alpha-helix
(= a-helix)
A particular helical folding of the polypeptide backbone in protein molecules (both fibrous and globular), in which the carbonyl oxygens are all hydrogen-bonded to amide nitrogen atoms three residues along the chain. The translation of amino acid residues along the long axis is 0.15nm, and the rotation per residue, 100°, so that there are 3.6 residues per turn.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • alpha helix — alpha helix. См. альфа спираль. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Alpha helix — A common motif in the secondary structure of proteins, the alpha helix (α helix) is a right handed coiled conformation, resembling a spring, in which every backbone N H group donates a hydrogen bond to the backbone C=O group of the amino acid… …   Wikipedia

  • alpha helix — alfa spiralė statusas T sritis chemija apibrėžtis Antrinės baltymų struktūros pavidalas. atitikmenys: angl. alpha helix rus. альфа спираль …   Chemijos terminų aiškinamasis žodynas

  • Alpha-Helix — Die α Helix ist ein häufig auftretendes Motiv der Sekundärstruktur eines Polypeptids bzw. Proteins. Andere Motive sind das β Faltblatt und drei verschiedene Arten von β Schleifen. Als Sekundärstruktur bezeichnet man die räumliche Lage der… …   Deutsch Wikipedia

  • alpha-helix — noun : the coiled structural arrangement of many proteins consisting of a single chain of amino acids that is stabilized by hydrogen bonds compare beta sheet herein double helix herein • alpha helical ˌ ̷ ̷  ̷ ̷ ˈ ̷ ̷  ̷ ̷  ̷ ̷ adjective …   Useful english dictionary

  • alpha helix — noun A secondary structure found in many proteins, where the amino acids are arranged in a coil, or helix, with almost no free space on the inside and all side chains being pointed towards the outside …   Wiktionary

  • alpha-helix — al·pha he·lix or à he·lix .al fə hē liks n the coiled structural arrangement of many proteins consisting of a single chain of amino acids stabilized by hydrogen bonds compare beta sheet, DOUBLE HELIX al·pha he·li·cal hel i kəl, hē li adj …   Medical dictionary

  • alpha-helix — noun Date: 1955 the coiled structural arrangement of many proteins consisting of a single chain of amino acids stabilized by hydrogen bonds • alpha helical adjective …   New Collegiate Dictionary

  • alpha helix — Biochem. the rodlike spatial configuration of many protein molecules in which the polypeptide backbone is stabilized by hydrogen bonds between amino acids in successive helical turns. [1950 55] * * * …   Universalium

  • alpha helix — al′pha he′lix n. biochem. the spatial configuration of many protein molecules in which the polypeptide backbone is stabilized by hydrogen bonds between amino acids in successive helical turns • Etymology: 1950–55 …   From formal English to slang

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