DASSD: Dihedral Angle and Secondary Structure Database of
Short Amino Acid Fragments
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About this Database
This database stores dihedral angles and secondary structure details of short fragments of amino acids of
lengths 1, 3 and 5. In total, this database stores details for around 733,000 short amino acid fragments.
For each fragment, the following can be viewed and obtained from this database:
1. Ramachandran plot of the middle amino acid of the fragment
2. Distribution of the dihedral angle Phi
3. Distribution of the dihedral angle Psi and
4. The STRIDE secondary structure classification of the middle amino acid of the fragment.
The above details of the fragments were extracted from a set of 5,227 non redundant protein structures
with less than 2 angstrom resolution. This dataset (cullpdb_pc90_res2.0_R0.25) was obtained from the PISCES
protein sequence culling server.
Copyright © 2005 Saravanan Dayalan