Overview
The KEYWDS record contains a set of terms relevant to the entry. Terms in the KEYWDS record provide a simple means of categorizing entries and may be used to generate index files. This record addresses some of the limitations found in the classification field of the HEADER record. It provides the opportunity to add further annotation to the entry in a concise and computer-searchable fashion.
Record Format
COLUMNS DATA TYPE FIELD DEFINITION
---------------------------------------------------------------------------------
1 - 6 Record name "KEYWDS"
9 - 10 Continuation continuation Allows concatenation of records if
necessary.
11 - 70 List keywds Comma-separated list of keywords
relevant to the entry.
Details
* The KEYWDS record contains a list of terms relevant to the entry, similar to that found in journal articles. A phrase may be used if it presents a single concept (e.g., reaction center). Terms provided in this record may include those that describe the following:
- Functional classification.
- Metabolic role.
- Known biological or chemical activity.
- Structural classification.
*Other classifying terms may be used. No ordering is required for these terms. A number of PDB entries contain complexes of macromolecules. In these cases, all terms applicable to each molecule should be provided.
*Note that the terms in the KEYWDS record duplicate those found in the classification field of the HEADER record. Terms abbreviated in the HEADER record are unabbreviated in KEYWDS, and the parentheses used in HEADER are optional in KEYWDS.
Verification/Validation/Value Authority Control
Terms used in the KEYWDS record are subject to scientific and editorial review. A list of terms, definitions, and synonyms will be maintained at the PDB. Every attempt will be made to provide some level of consistency with keywords used in other biological databases.
Relationships to Other Record Types
HEADER records contain a classification term which must also appear in KEYWDS. Scientific judgment will dictate when terms used in one entry to describe a molecule should be included in other entries with the same or similar molecules.
Example
1 2 3 4 5 6 7
1234567890123456789012345678901234567890123456789012345678901234567890
KEYWDS LYASE, TRICARBOXYLIC ACID CYCLE, MITOCHONDRION, OXIDATIVE
KEYWDS 2 METABOLISM