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 ID	ChEMBL structure	Converted sequence image	Proteax PLN (Protein Line Notation)
CHEMBL159723			[acetyl]-DE[Res_1724]E[Res_2201][Abu]-OH name=CHEMBL159723
CHEMBL262161			H-HFRWGK{d}KV-[NH2] name=CHEMBL262161
CHEMBL412048			H-R{d}P{d}K{d}PQQF{d}FG{d}LM-[NH2] name=CHEMBL412048
CHEMBL572151			H-VPVP-[CTerm_1055] name=CHEMBL572151
CHEMBL102379			H-VVNDL-OH name=CHEMBL102379
CHEMBL317228			[acetyl]-H[Res_245]RW-[NH2] name=CHEMBL317228
CHEMBL507108			[NTerm_410]-NDVD[Tyr(3-NO2)]-[NH2] name=CHEMBL507108
CHEMBL364819			H-GQLDLAD-OH name=CHEMBL364819
CHEMBL1802419			H-EELNGYSRKKGGFSFRF-[NH2] name=CHEMBL1802419
CHEMBL1075778			[NTerm_1227]-{d}HYF-OH name=CHEMBL1075778
CHEMBL591888			[NTerm_37]-[Res_1340]{d}[Res_733]{d}[Res_733]{d}[Res_733]-[NH2] name=CHEMBL591888
CHEMBL1256063			[NTerm_700]-DLRWF-[NH2] name=CHEMBL1256063
CHEMBL2370576			H-[PyGlu]HWSY{d}WL[Res_1432]P-[CTerm_258] name=CHEMBL2370576
CHEMBL405905			(cyclo)-[N(Me)Bmt(E)][Abu][MeGly][MeLeu]V[MeLeu]A[Res_2256][MeLeu][MeLeu][MeVal]-(cyclo) name=CHEMBL405905
CHEMBL412792			H-YG{d}FFLRRIRPK-[NH2] name=CHEMBL412792
CHEMBL1688778			H-VPV-[CTerm_1032] name=CHEMBL1688778
CHEMBL161243			[NTerm_700]-AAFF-[CTerm_281] name=CHEMBL161243
CHEMBL385969			H-QHWAVGH-[CTerm_151] name=CHEMBL385969
CHEMBL266047			H-{d}Y{d}C(1){d}F[Res_2394]{d}WKTFC(1)-OH name=CHEMBL266047
CHEMBL191662			[NTerm_1442]-T{d}[Res_1036]F-[NH2] name=CHEMBL191662

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:

N-terminals, 1699 structures, 420 kB
C-terminals, 1270 structures, 333 kB
Residues, 3030 structures, 726 kB

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:

Residue names update script, 143 name assigments, 18 kB

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.