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)
CHEMBL437458			H-SS{d}C(1)A[Res_1650]GG{d}RI{d}DRI{d}C(1){d}F{d}R-OH name=CHEMBL437458
CHEMBL299028			[NTerm_877]-VPV-[CTerm_707] name=CHEMBL299028
CHEMBL524722			H-QRF{d}[Res_3018]TGHF{d}PPLYPCNGP-OH name=CHEMBL524722
CHEMBL263347			H-EPQ[PhTyr]EEIPI-OH name=CHEMBL263347
CHEMBL1649725			H-KWKLFKKIEKVGQRVRDAVISAGPAVATVAQATALAK-OH name=CHEMBL1649725
CHEMBL2372384			H-W{d}[Res_895]A-OH name=CHEMBL2372384
CHEMBL1076088			[NTerm_1338]-HHY-[CTerm_810] name=CHEMBL1076088
CHEMBL577746			H-YPF{d}V-[CTerm_1086] name=CHEMBL577746
CHEMBL406337			[acetyl]-{d}[Res_1340]{d}[Res_1788]{d}[Res_1343]S{d}[Res_1357][Res_143]L[Res_2151]P{d}A-[NH2] name=CHEMBL406337
CHEMBL2372450			[NTerm_747]-Y{d}RG[Res_2188]-[NH2] name=CHEMBL2372450
CHEMBL2403644			[NTerm_836]-[Res_1354][Res_1287][Res_1514]-[CTerm_1100] name=CHEMBL2403644
CHEMBL396054			[NTerm_700]-[Res_1354]{d}[Res_1064][Res_1514]-[CTerm_1100] name=CHEMBL396054
CHEMBL1255949			H-RGGRLC(1)YC(2)RRRFC(2)VC(1)VGR-[NH2] name=CHEMBL1255949
CHEMBL1332005			H-[Res_1700]IP-[CTerm_994] name=CHEMBL1332005
CHEMBL440243			H-S[MeLeu]TFHL[MeLeu]REVLEM[Res_1700]RAEQ{d}[MeLeu]AQQA{d}[Res_1700]SNRK{d}[MeLeu]MEI{d}[Res_1700]-[NH2] name=CHEMBL440243
CHEMBL321894			H-DEVV{d}P-[CTerm_482] name=CHEMBL321894
CHEMBL1620974			H-[Res_1700]VS-[CTerm_390] name=CHEMBL1620974
CHEMBL1075742			[NTerm_801]-TFQ-[CTerm_505] name=CHEMBL1075742
CHEMBL427666			[acetyl]-YR[Cys(Me)]EH{d}FRW[Cys(Me)]-[NH2] name=CHEMBL427666
CHEMBL2207146			H-GAP-[CTerm_793] name=CHEMBL2207146

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.