Standard Residues
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| - | ''Standard residues'' ([[Amino Acids|standard amino acids]] and nucleotides) are defined in the [ | + | ''Standard residues'' ([[Amino Acids|standard amino acids]] and nucleotides) are defined in the [[PDB files|PDB data file format]], and have record type ATOM in PDB-format atomic coordinate files. Standard residues are: |
* The [[Amino Acids|20 standard amino acids]], plus ambiguous residue codes ASX, GLX, and undetermined UNK. | * The [[Amino Acids|20 standard amino acids]], plus ambiguous residue codes ASX, GLX, and undetermined UNK. | ||
Revision as of 02:31, 26 December 2009
Standard residues (standard amino acids and nucleotides) are defined in the PDB data file format, and have record type ATOM in PDB-format atomic coordinate files. Standard residues are:
- The 20 standard amino acids, plus ambiguous residue codes ASX, GLX, and undetermined UNK.
- Twelve standard nucleotides A, C, G, I, T, U, DA, DC, DG, DI, DT, and DU plus UNK.
The distinction between ribonucleotides (A, C, G, I, T, U) and deoxyribonucleotides (DA, DC, DG, DI, DT, DU) was first made when the PDB was remediated, effective August 1, 2007. The unremediated files can still be obtained, see Getting Unremediated PDB Files.
See also Non-Standard Residues
