ECOD
X-group (possible homology)

5068 a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)

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Ligands and drugs

1,875
Member domains
408
with ligand contacts (≤ 4 Å)
21.8% of members
262
with DrugDomain annotations
14.0% of members
234
with a DrugBank compound
12.5% of members

Aggregated over all current member domains of this group. Drug annotations come from DrugDomain; buffers and crystallization additives are excluded from the tables below.

Chemical profile

ClassyFire chemical superclasses of the ligands bound by this X-group's proteins, from DrugDomain annotations.

24
Proteins with classified ligands
8
Superclasses bound (of 23)
7.8
Superclasses per 20 proteins
broader than 52% of the 256 X-groups with enough proteins to compare (median 7.6)

The raw number of superclasses rises with the number of proteins sampled; the per-20 value compares X-groups at equal depth.

SuperclassProteinsExpected
0.25×observed / expected4×
RatioSignificance
Homogeneous metal compounds411.60.34×q = 4.0e-3
Homogeneous non-metal compounds05.10q = 0.01
Nucleosides, nucleotides, and analogues06.50q = 2.0e-3
Hydrocarbons30.218×not tested
Lipids and lipid-like molecules212.67.97×not tested
Organoheterocyclic compounds153.64.12×not tested
Benzenoids61.73.47×not tested
Phenylpropanoids and polyketides10.52.03×not tested
Organic oxygen compounds34.70.64×not tested
Organic acids and derivatives23.70.55×not tested
enriched (q < 0.05)depleted (q < 0.05)not significantnot tested (expected < 5)

Unit: a protein (UniProt accession) with a ligand-binding domain in this X-group, counted once per superclass. Expected counts use each superclass's frequency across all ligand-binding X-groups; significance is Fisher's exact test with Benjamini–Hochberg correction. Buffers and crystallization additives are excluded. ECOD v295.2; the method follows the ECOD 2027 update, whose published figures used a slightly different artifact filter.

DrugBank compounds

DrugBankPDB ligandNameDomains
DB18267HEMFerroheme169
DB04327PEEPhosphatidylethanolamine47
DB03429CDLTetrastearoyl cardiolipin37
DB02133CLAChlorophyll A25
DB03317HECFerroheme C21
DB06755BCRBeta carotene21
DB02686UMQUndecyl-Beta-D-Maltopyranoside14
DB01728PEF1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine11
DB07778FMX(S)-famoxadone8
DB01117AOQAtovaquone7
DB07401AZOAzoxystrobin7
DB09114PCFColfosceril palmitate7
DB09270U10Ubidecarenone6
DB00126ASCAscorbic acid4
DB08453QNO2-Nonyl-4-quinolinol 1-oxide3
DB04646BNTDibromothymoquinone2
DB04799UHD6-Hydroxy-5-undecyl-4,7-benzothiazoledione2
DB07636DBT5-Heptyl-6-hydroxy-1,3-benzothiazole-4,7-dione2
DB07763FDN(5S)-3-ANILINO-5-(2,4-DIFLUOROPHENYL)-5-METHYL-1,3-OXAZOLIDINE-2,4-DIONE2
DB08330OSTMETHYL (2Z)-3-METHOXY-2-{2-[(E)-2-PHENYLVINYL]PHENYL}ACRYLATE2

Most frequently bound compounds

PDB ligandNameDomains in contact
HEMPROTOPORPHYRIN IX CONTAINING FE301
PEE1,2-dioleoyl-sn-glycero-3-phosphoethanolamine83
3PE1,2-Distearoyl-sn-glycerophosphoethanolamine63
CDLCARDIOLIPIN63
SMASTIGMATELLIN A59
PC11,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE54
U10UBIQUINONE-1039
HECHEME C38
LOP(1R)-2-{[(R)-(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(DODECANOYLOXY)METHYL]ETHYL (9Z)-OCTADEC-9-ENOATE33
CLACHLOROPHYLL A32
SQD1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL26
8PE(2R)-3-{[(S)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-(tetradecanoyloxy)propyl octadecanoate23
UMQUNDECYL-MALTOSIDE22
BCRBETA-CAROTENE16
OPC(7R,17E)-4-HYDROXY-N,N,N,7-TETRAMETHYL-7-[(8E)-OCTADEC-8-ENOYLOXY]-10-OXO-3,5,9-TRIOXA-4-PHOSPHAHEPTACOS-17-EN-1-AMINIUM 4-OXIDE13
PEFDI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE13
UNLUnknown ligand11
PGV(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE10
PL92,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,22,26,30,34-HEXATRIACONTANONAENYL-2,5-CYCLOHEXADIENE-1,4-DIONE-2,3-DIMETHYL-5-SOLANESYL-1,4-BENZOQUINONE10
6PE1,2-DIHEXANOYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE9