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)
CHEMBL499090			H-KRWWWWWKR-OH name=CHEMBL499090
CHEMBL1802431			H-AGFSFRF-[NH2] name=CHEMBL1802431
CHEMBL1195753			[NTerm_1188]-VFM-OH name=CHEMBL1195753
CHEMBL59780			[NTerm_887]-AAWFPP[Nle]-[NH2] name=CHEMBL59780
CHEMBL26575			H-Y{d}AFEVVG-OH name=CHEMBL26575
CHEMBL525385			[NTerm_770]-{d}R{d}R{d}R{d}R{d}R{d}R-[NH2] name=CHEMBL525385
CHEMBL1240740			H-GIFDKLAKEISIW-OH name=CHEMBL1240740
CHEMBL2031690			H-KSLVRRWRSRW-[NH2] name=CHEMBL2031690
CHEMBL2370442			[NTerm_700]-[Res_2240][Nle]GW[Orn]D-[NH2] name=CHEMBL2370442
CHEMBL2402970			H-C(1)C(2)NC(3)SS[MeGly]WC(1)RDHSRC(2)C(3)-[NH2] name=CHEMBL2402970
CHEMBL1784776			[acetyl]-[PhSer]PIF-[NH2] name=CHEMBL1784776
CHEMBL525234			H-KGASVPGAGLV-[CTerm_904] name=CHEMBL525234
CHEMBL2369799			[NTerm_1479]-SY{d}[Res_2201]LRP-[CTerm_258] name=CHEMBL2369799
CHEMBL2372394			H-Y{d}[Res_1579]F[MeGly]-[NH2] name=CHEMBL2372394
CHEMBL2371597			[acetyl]-[Res_853]MGWM[Res_647]F-[NH2] name=CHEMBL2371597
CHEMBL390591			H-VKQLLKIFNRF-[NH2] name=CHEMBL390591
CHEMBL526689			H-TPRAARRKKR-OH name=CHEMBL526689
CHEMBL442476			(cyclo)-[Res_1700][MeLeu]V[MeLeu]A{d}A[MeLeu][MeLeu][MeVal][N(Me)Bmt(E)][Abu]-(cyclo) name=CHEMBL442476
CHEMBL411424			[NTerm_579]-TRQARRNRRRRWRERQRG-[NH2] name=CHEMBL411424
CHEMBL388060			H-D[Res_3018](1)F{d}WKYC(1)V-OH name=CHEMBL388060

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.