Is PDB a secondary database?

Question

PDB (Berman et al., 2000) is the most comprehensive repository of structure data for biological macromolecules. The repository contains the primary structure and secondary structure information along with the atomic coordinates of a constituent atoms of biomolecule. It also contains corresponding experimental data.

Is PDB a primary database?

All the data collected from depositors by the PDB are considered primary data. Primary data contain, in addition to the coordinates, general information required for all deposited structures and information specific to the method of structure determination.

Is PDB a primary or secondary database?

PDB is a primary protein structure database. It is a crystallographic database for the three-dimensional structure of large biological molecules, such as proteins.

What type of database is PDB?

The PDB is a structure database that contains the three-dimensional crystal structure of macromolecules that are experimentally determined (Berman et al., 2000). These experimental methods are X-ray crystallography and NMR spectroscopy and nowadays cryo-electron microscopy is also used.

Is NCBI secondary database?

Primary databases contain raw data as archival repository such as the NCBI Sequence Read Archive (SRA) [7], whereas secondary or derivative databases contain curated information as added value, e.g., NCBI RefSeq [8].

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