PDB FORMAT Version 3.0.1
Main Index

Coordinate Section

The Coordinate Section contains the collection of atomic coordinates as well as the MODEL and ENDMDL records.


The ATOM records present the atomic coordinates for standard residues. They also present the occupancy and temperature factor for each atom. Non-polymer chemical coordinates use the HETATM record type. The element symbol is always present on each ATOM record; segment identifier and charge are optional.

The character/column format of the ATOM/HETATM records is not changed. Changes in ATOM/HETATM records result from the standardization atom and residue nomenclature. This nomenclature is described in electronic form in the PDB Chemical Components Dictionary, which may be downloaded at http://remediation.wwpdb.org/downloads/Components-rel-alt.cif.


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