Data Item _pdbx_modification_feature.category
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General 
- Item name
- _pdbx_modification_feature.category
- Category name
- pdbx_modification_feature
- Attribute name
- category
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The category of protein modification.
Item Example
Named protein modification
Data Type 
- Data type code
- line
- Data type detail
- char item types / multi-word items ...
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| ADP-ribose | ADP-ribose protein modifications |
| Amino acid | Canonical amino acid linked to a peptide residue |
| Biotin | Biotin protein modifications |
| Carbohydrate | Carbohydrate protein modifications |
| Chromophore/chromophore-like | Chromophore or chromophore-like protein modifications |
| Covalent chemical modification | A diverse range of chemical compounds that form covalent bonds with amino acids. Not covered by any of the other modification categories |
| Crosslinker | Chemical modifications which covalently link two amino-acid residues. Excludes reaction intermediates and modifications covered by other modification categories |
| Disulfide bridge | Disulfide bridge protein modifications |
| Flavin | Flavin protein modifications |
| Heme/heme-like | Heme or heme-like protein modifications |
| Isopeptide bond | Isopeptide bond protein modifications |
| Lipid/lipid-like | Lipid or lipid-like protein modifications |
| Named protein modification | All protein modifications that are well defined into known types, have limited diversity, and are not explicitly covered by any other category. It includes PTMs, PCMs, rare amino acids and unnatural amino acids |
| Non-standard linkage | Non-standard covalent chemical linkages directly between two polypeptide residues |
| Non-standard residue | A diverse range of non-standard polypeptide residues that are not considered to be 'Named protein modifications'. These cannot be practically split into two CCDs, which describe the standard polypeptide residue and the modification group, and are not covered by any of the other modification categories |
| Nucleotide monophosphate | Nucleotide monophosphate protein modifications |
| Terminal acetylation | Terminal acetylation protein modification |
| Terminal amidation | Terminal amidation protein modification |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| ADP-ribose | ADP-ribose protein modifications |
| Amino acid | Canonical amino acid linked to a peptide residue |
| Biotin | Biotin protein modifications |
| Carbohydrate | Carbohydrate protein modifications |
| Chromophore/chromophore-like | Chromophore or chromophore-like protein modifications |
| Covalent chemical modification | A diverse range of chemical compounds that form covalent bonds with amino acids. Not covered by any of the other modification categories |
| Crosslinker | Chemical modifications which covalently link two amino-acid residues. Excludes reaction intermediates and modifications covered by other modification categories |
| Disulfide bridge | Disulfide bridge protein modifications |
| Flavin | Flavin protein modifications |
| Heme/heme-like | Heme or heme-like protein modifications |
| Isopeptide bond | Isopeptide bond protein modifications |
| Lipid/lipid-like | Lipid or lipid-like protein modifications |
| Named protein modification | All protein modifications that are well defined into known types, have limited diversity, and are not explicitly covered by any other category. It includes PTMs, PCMs, rare amino acids and unnatural amino acids |
| Non-standard linkage | Non-standard covalent chemical linkages directly between two polypeptide residues |
| Non-standard residue | A diverse range of non-standard polypeptide residues that are not considered to be 'Named protein modifications'. These cannot be practically split into two CCDs, which describe the standard polypeptide residue and the modification group, and are not covered by any of the other modification categories |
| Nucleotide monophosphate | Nucleotide monophosphate protein modifications |
| Terminal acetylation | Terminal acetylation protein modification |
| Terminal amidation | Terminal amidation protein modification |