Converting ChEMBL to sequence

This page gives you access to a subset of ChEMBL that has been converted to Protein Line Notation. A total of 27142 structures out of 39123 "peptide-like" structures have been successfully converted. More details on the conversion process can be found beneath the structure table.

ChEMBL ID contains
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20 randomly selected converted structures

ChEMBL IDChEMBL structureConverted sequence imageProteax PLN (Protein Line Notation)
CHEMBL2370311[acetyl]-[Res_1340]Y[Res_1340]RA-[NH2] name=CHEMBL2370311
CHEMBL437073H-AG{d}C(1){d}KN{d}AF{d}WKTFTSC(1)-OH name=CHEMBL437073
CHEMBL2369369H-{d}[Res_787]LG-[NH2] name=CHEMBL2369369
CHEMBL402225[NTerm_800]-PEPTA[Res_2161][Res_1555]EE-[NH2] name=CHEMBL402225
CHEMBL355810H-SNTFA-[CTerm_663] name=CHEMBL355810
CHEMBL333444[NTerm_1630]-[Res_1354]{d}[Res_895]Q-OH name=CHEMBL333444
CHEMBL320157[acetyl]-P{d}FRW-[NH2] name=CHEMBL320157
CHEMBL1198962[NTerm_386]-{d}K{d}R{d}L-[CTerm_663] name=CHEMBL1198962
CHEMBL433636[NTerm_700]-W[Res_1256]DF-[NH2] name=CHEMBL433636
CHEMBL2089162H-FLF-[NH2] name=CHEMBL2089162
CHEMBL267150[acetyl]-[Res_1340][Res_1788]{d}WSYR[Res_2036]RPA-[NH2] name=CHEMBL267150
CHEMBL415221[NTerm_40]-FGLRW-[NH2] name=CHEMBL415221
CHEMBL448088[NTerm_187]-LLL[Res_863]-[CTerm_373] name=CHEMBL448088
CHEMBL1645506H-[Res_2206]VL-[CTerm_7] name=CHEMBL1645506
CHEMBL2407176H-R[Res_1131]R-[NH2] name=CHEMBL2407176
CHEMBL474732H-GAPAPG-[NH2] name=CHEMBL474732
CHEMBL186265H-A[Res_594]PFY-OH name=CHEMBL186265
CHEMBL103336H-[MeGly]RVYAHPI-OH name=CHEMBL103336

Conversion process

All structures in the ChEMBL 19 database were downloaded as an SD file and, with the help of KNIME, probable "peptide-like" structures were identified. The "peptide-like" structures were defined as those containing a substructure of three connected glysines. This yielded a "peptide-like" subset of 39123 structures.

The peptide subset was loaded into a PostgreSQL database table and the Biochemfusion Proteax cartridge was used to convert structures, when possible, to sequences. The first conversion took 87 seconds and produced 27142 converted sequences.

You can download the full set of produced sequences (TAB-separated file with ChEMBL ID + PLN, ~11MB).

All found unknown residues and terminal structures were embedded as inline structures in the first round of produced PLN. The embedded structures were then de-duplicated and extracted. You can download the structure sets in gzip-ed SD file format from here:

143 of the unknown residue structures have been assigned well-defined names by NextMove Software's great Sugar & Splice tool (press the "Biologics" button). Many thanks to Roger Sayle at NextMove Software for processing this subset of residues with Sugar & Splice.

NextMove's residue names can be applied to a Proteax modification database (where the above SD files have been imported) by the following SQL script:

The currently produced PLN has been generated after all the above data has been loaded into Proteax's database of known structures. As you will see, most of the non-natural residues and terminals have auto-generated names based on sequential numbers.