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.

Refresh page with an empty search box to get 100 random structures.

20 randomly selected converted structures

ChEMBL ID	ChEMBL structure	Converted sequence image	Proteax PLN (Protein Line Notation)
CHEMBL216357			[NTerm_887]-[Nle]KR{d}[Res_2539]-OH name=CHEMBL216357
CHEMBL1966793			[NTerm_723]-GAF-[CTerm_663] name=CHEMBL1966793
CHEMBL1199923			[NTerm_1400]-{d}K{d}RA-[CTerm_663] name=CHEMBL1199923
CHEMBL544080			H-[Res_78][Res_2633]R-[Unknown_terminal_1] name=CHEMBL544080 inline-mod=C-terminal,[Unknown_terminal_1],H1,QkNGTRECAV9QBgBl/pgA3wUIAGX+mAEAARhSAgABGg==
CHEMBL2021453			H-AAF-[CTerm_527] name=CHEMBL2021453
CHEMBL341535			H-Y[Res_3018](1)G{d}[Res_2054]{d}[Res_3018](1)F-OH name=CHEMBL341535
CHEMBL506884			H-YGGFMRRVGRPEWWMDYQKRYGGFL-OH name=CHEMBL506884
CHEMBL1241030			[acetyl]-FLNCCPSQPTYPGDDAPVEDLIRPYDNLQQYLNVCCMEP-[NH2] name=CHEMBL1241030
CHEMBL438703			(cyclo)-PLILPPYV-(cyclo) name=CHEMBL438703
CHEMBL1169621			[NTerm_1439]-RPY[Res_1354]L-OH name=CHEMBL1169621
CHEMBL225583			H-RVLQEIKQILK-OH name=CHEMBL225583
CHEMBL81652			[NTerm_700]-FL[Res_2719]-[CTerm_99] name=CHEMBL81652
CHEMBL2371693			H-YASKPDNPGEDAPAED{d}MARYYSALRHYINLITRQR-OH name=CHEMBL2371693
CHEMBL509365			H-TPQRNRRRKKRG-OH name=CHEMBL509365
CHEMBL2030702			H-C(1)GREFIRAVIFTC(2)GGSRW-OH.H-C(1)KWGASKSEISSLC(2)-OH name=CHEMBL2030702
CHEMBL2372639			H-[Res_1820][Nva]{d}[Res_510]-[NH2] name=CHEMBL2372639
CHEMBL2440347			[NTerm_240]-RK[Nle]-[NH2] name=CHEMBL2440347
CHEMBL406338			[NTerm_505]-YGGFLRRIRPK-OH name=CHEMBL406338
CHEMBL1075801			[NTerm_820]-H{d}[Res_733]{d}Y-[CTerm_1112] name=CHEMBL1075801
CHEMBL97265			[acetyl]-[Res_1340]{d}[Res_1788]{d}[Res_270]G{d}R{d}PA-[NH2] name=CHEMBL97265

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.