parallel_beta_strand [SO_0001113]

A peptide region which hydrogen bonded to another region of peptide running in the oposite direction (both running N-terminal to C-terminal). This orientation is slightly less stable because it introduces nonplanarity in the inter-strand hydrogen bonding pattern. 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 do not hydrogen bond to each other; rather, one residue forms hydrogen bonds to the residues that flank the other (but not vice versa). For example, residue i may form hydrogen bonds to residues j - 1 and j + 1; this is known as a wide pair of hydrogen bonds. By contrast, residue j may hydrogen-bond to different residues altogether, or to none at all. The dihedral angles (phi, psi) are about (-120 degrees, 115 degrees) in parallel sheets. Range.

Open parallel_beta_strand in VFB

VFB Term Json

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            "iri": "http://purl.obolibrary.org/obo/SO_0001113",
            "symbol": "",
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                "Class"
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            "short_form": "SO_0001113",
            "label": "parallel_beta_strand"
        },
        "description": [
            "A peptide region which hydrogen bonded to another region of peptide running in the oposite direction (both running N-terminal to C-terminal). This orientation is slightly less stable because it introduces nonplanarity in the inter-strand hydrogen bonding pattern. 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 do not hydrogen bond to each other; rather, one residue forms hydrogen bonds to the residues that flank the other (but not vice versa). For example, residue i may form hydrogen bonds to residues j - 1 and j + 1; this is known as a wide pair of hydrogen bonds. By contrast, residue j may hydrogen-bond to different residues altogether, or to none at all. The dihedral angles (phi, psi) are about (-120 degrees, 115 degrees) in parallel sheets."
        ],
        "comment": [
            "Range."
        ]
    },
    "query": "Get JSON for Class",
    "version": "44725ae",
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    "anatomy_channel_image": [],
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        {
            "synonym": {
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                "label": "parallel beta strand",
                "type": ""
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