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)
CHEMBL507393			[acetyl]-SNWKWWPG-[NH2] name=CHEMBL507393
CHEMBL601451			H-K{d}[Res_895]K-OH name=CHEMBL601451
CHEMBL431016			[acetyl]-[Res_1036]V[Res_1152]{d}[Res_730]-OH name=CHEMBL431016
CHEMBL1086449			[acetyl]-SARAEVHLRKS-[NH2] name=CHEMBL1086449
CHEMBL506092			[NTerm_868]-KKR-[Unknown_terminal_1] name=CHEMBL506092 inline-mod=C-terminal,[Unknown_terminal_1],H1,QkNGTRECAb/lLgC1/pMAP5swALX+kwEAARhSAgABGg==
CHEMBL424227			[acetyl]-[Res_1601]LGGIW-OH name=CHEMBL424227
CHEMBL265189			[NTerm_836]-[Res_1354][Res_294][Res_1514]-[CTerm_1100] name=CHEMBL265189
CHEMBL358637			H-LRRA-[CTerm_91] name=CHEMBL358637
CHEMBL358943			[NTerm_444]-VPV-[CTerm_893] name=CHEMBL358943
CHEMBL117143			H-{d}[Res_733]KP{d}[Res_2201]WR-OH name=CHEMBL117143
CHEMBL2316745			[NTerm_820]-VL[Res_2861]-[CTerm_757] name=CHEMBL2316745
CHEMBL2372214			H-Y[Res_3018](1)FH{d}[Res_3018](1)[Nle]D-[NH2] name=CHEMBL2372214
CHEMBL413075			[acetyl]-[Res_1340]{d}[Res_1788]{d}[Res_1343]S{d}[Res_1357][Res_1357]L[Res_2151]P-[CTerm_23] name=CHEMBL413075
CHEMBL19875			H-{d}[Res_44]VVNDL-OH name=CHEMBL19875
CHEMBL1817697			H-C(1)FI[Asn(EtOH)]NC(1)P[Orn]G-[NH2] name=CHEMBL1817697
CHEMBL406897			H-ACAWAGIKQEF-OH name=CHEMBL406897
CHEMBL2371827			[acetyl]-[Nle]GK[Res_2558]RWG-[NH2] name=CHEMBL2371827
CHEMBL355990			H-ESARPM-OH name=CHEMBL355990
CHEMBL54363			H-LGL-OH name=CHEMBL54363
CHEMBL442113			H-FGGFTCARKCARK-[NH2] name=CHEMBL442113

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.