antiparallel_beta_strand (CURRENT_SVN) |
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|---|---|
| SO Accession: | SO:0001112 (SOWiki) |
| Definition: | A peptide region which hydrogen bonded to another region of peptide running in the oposite direction (one running N-terminal to C-terminal and one running C-terminal to N-terminal). Hydrogen bonding occurs between every other C=O from one strand to every other N-H on the adjacent strand. In this case, if two atoms C-alpha (i) and C-alpha (j) are adjacent in two hydrogen-bonded beta strands, then they form two mutual backbone hydrogen bonds to each other's flanking peptide groups; this is known as a close pair of hydrogen bonds. The peptide backbone dihedral angles (phi, psi) are about (-140 degrees, 135 degrees) in antiparallel sheets. |
| Synonyms: | antiparallel beta strand, BS:0000341 |
| DB Xrefs: | EBIBS: GAR |
| UniProt: curation_manual | |
| Parent: | beta_strand (SO:0001111) |
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