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

Search is done within records with converted sequences only. Result listing is limited to max. 100 records.

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20 randomly selected converted structures

ChEMBL ID	ChEMBL structure	Converted sequence image	Proteax PLN (Protein Line Notation)
CHEMBL524488			H-TPQRARRRKKR{d}K-OH name=CHEMBL524488
CHEMBL1791221			H-[Res_1892]ADAIFTNSYRKVLAQLSARKLLQE(cyclo1)I{d}[Nle]SK(cyclo1)-[NH2] name=CHEMBL1791221
CHEMBL3040606			H-[Res_1904]LG-[CTerm_810] name=CHEMBL3040606
CHEMBL1836970			H-GC(1)C(2)SDPRC(2)RYRC(1)GGAAGG-OH name=CHEMBL1836970
CHEMBL310403			[NTerm_581]-H{d}F{d}[Res_2542]WG-[NH2] name=CHEMBL310403
CHEMBL314691			(cyclo)-P{d}VL{d}W{d}D-(cyclo) name=CHEMBL314691
CHEMBL427764			[NTerm_820]-{d}H{d}[Res_2713][Res_488]WA-[NH2] name=CHEMBL427764
CHEMBL315506			(cyclo)-{d}P{d}DL{d}DT{d}F-(cyclo) name=CHEMBL315506
CHEMBL2440153			[NTerm_1461]-RK[Nle]-[NH2] name=CHEMBL2440153
CHEMBL1870297			H-[Res_1189]SLI-[CTerm_810] name=CHEMBL1870297
CHEMBL413695			H-RPKPQQF{d}FG{d}LM-[NH2] name=CHEMBL413695
CHEMBL1766927			H-RRPYIA-OH name=CHEMBL1766927
CHEMBL438712			[acetyl]-{d}[Res_1340][Res_1788]{d}C(1)AR[Res_1340]LC(1)PA-[NH2] name=CHEMBL438712
CHEMBL3132982			H-NRFCELFCIQGTGDVKACEWACQ-OH name=CHEMBL3132982
CHEMBL152303			[NTerm_1525]-VPV-[CTerm_586] name=CHEMBL152303
CHEMBL374491			[NTerm_621]-[Res_397]SKKKK-[NH2] name=CHEMBL374491
CHEMBL446667			[acetyl]-[Res_1036]V[Res_1152][Res_2197]-OH name=CHEMBL446667
CHEMBL2373390			[NTerm_33]-P[Res_776]R-OH name=CHEMBL2373390
CHEMBL1075748			[NTerm_1688]-{d}Y[N(Me)Tyr(Me)]{d}[Res_733]-[CTerm_1194] name=CHEMBL1075748
CHEMBL176874			[NTerm_1102]-VFA-[CTerm_1086] name=CHEMBL176874

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.