Yes, the atom coordindate records in the PDBx/mmCIF data distributed by the wwPDB are stored on individual lines each beginning with either 'ATOM' or 'HETATM'. The elements of each coordinate record are white-space delimited. For example, PDBx/mmCIF coordinate records in PDB entries all have the following regular layout.
loop_ _atom_site.group_PDB _atom_site.id _atom_site.type_symbol _atom_site.label_atom_id _atom_site.label_alt_id _atom_site.label_comp_id _atom_site.label_asym_id _atom_site.label_entity_id _atom_site.label_seq_id _atom_site.pdbx_PDB_ins_code _atom_site.Cartn_x _atom_site.Cartn_y _atom_site.Cartn_z _atom_site.occupancy _atom_site.B_iso_or_equiv _atom_site.Cartn_x_esd _atom_site.Cartn_y_esd _atom_site.Cartn_z_esd _atom_site.occupancy_esd _atom_site.B_iso_or_equiv_esd _atom_site.pdbx_formal_charge _atom_site.auth_seq_id _atom_site.auth_comp_id _atom_site.auth_asym_id _atom_site.auth_atom_id _atom_site.pdbx_PDB_model_num ATOM 1 N N . VAL A 1 1 ? 6.204 16.869 4.854 1.00 49.05 ? ? ? ? ? ? 1 VAL A N 1 ATOM 2 C CA . VAL A 1 1 ? 6.913 17.759 4.607 1.00 43.14 ? ? ? ? ? ? 1 VAL A CA 1 ATOM 3 C C . VAL A 1 1 ? 8.504 17.378 4.797 1.00 24.80 ? ? ? ? ? ? 1 VAL A C 1 ATOM 4 O O . VAL A 1 1 ? 8.805 17.011 5.943 1.00 37.68 ? ? ? ? ? ? 1 VAL A O 1 ATOM 5 C CB . VAL A 1 1 ? 6.369 19.044 5.810 1.00 72.12 ? ? ? ? ? ? 1 VAL A CB 1 ATOM 6 C CG1 . VAL A 1 1 ? 7.009 20.127 5.418 1.00 61.79 ? ? ? ? ? ? 1 VAL A CG1 1 ATOM 7 C CG2 . VAL A 1 1 ? 5.246 18.533 5.681 1.00 80.12 ? ? ? ? ? ? 1 VAL A CG2 1 ATOM 8 N N . LEU A 1 2 ? 9.096 18.040 3.857 1.00 26.44 ? ? ? ? ? ? 2 LEU A N 1 ATOM 9 C CA . LEU A 1 2 ? 10.600 17.889 4.283 1.00 26.32 ? ? ? ? ? ? 2 LEU A CA 1 ATOM 10 C C . LEU A 1 2 ? 11.265 19.184 5.297 1.00 32.96 ? ? ? ? ? ? 2 LEU A C 1 ATOM 11 O O . LEU A 1 2 ? 10.813 20.177 4.647 1.00 31.90 ? ? ? ? ? ? 2 LEU A O 1 ATOM 12 C CB . LEU A 1 2 ? 11.099 18.007 2.815 1.00 29.23 ? ? ? ? ? ? 2 LEU A CB 1 ATOM 13 C CG . LEU A 1 2 ? 11.322 16.956 1.934 1.00 37.71 ? ? ? ? ? ? 2 LEU A CG 1 ATOM 14 C CD1 . LEU A 1 2 ? 11.468 15.596 2.337 1.00 39.10 ? ? ? ? ? ? 2 LEU A CD1 1 ATOM 15 C CD2 . LEU A 1 2 ? 11.423 17.268 0.300 1.00 37.47 ? ? ? ? ? ? 2 LEU A CD2 1
The following command will extract the PDB atom record name, atom name, residue name, chain identifier, residue number, Cartesian X, Y, and Z coordinates from the above snippet of PDBx/mmCIF coordinate data for PDB entry 4HHB.
grep '^ATOM' 4HHB.cif | awk '{print $1, $25, $23, $24, $22, $11, $12, $13}'