ECOD
X-group (possible homology)

3281 Sodium/proton antiporter subunits-like

Open in classification tree →

Ligands and drugs

3,473
Member domains
1,186
with ligand contacts (≤ 4 Å)
34.1% of members
762
with DrugDomain annotations
21.9% of members
580
with a DrugBank compound
16.7% 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.

80
Proteins with classified ligands
7
Superclasses bound (of 23)
4.8
Superclasses per 20 proteins
narrower than 86% 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
Lipids and lipid-like molecules798.88.99×q < 0.0001
Organic acids and derivatives912.20.74×q = 0.52
Organoheterocyclic compounds312.10.25×q = 5.6e-3
Benzenoids15.80.17×q = 0.05
Homogeneous metal compounds238.70.05×q < 0.0001
Homogeneous non-metal compounds017.00q < 0.0001
Nucleosides, nucleotides, and analogues021.80q < 0.0001
Organic oxygen compounds015.70q < 0.0001
Hydrocarbons140.625×not tested
Phenylpropanoids and polyketides31.61.83×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
DB03429CDLTetrastearoyl cardiolipin513
DB04327PEEPhosphatidylethanolamine248
DB08231MYRMyristic acid47
DB02777PLCDiundecyl Phosphatidyl Choline24
DB02043LHG1,2-Dipalmitoyl-Phosphatidyl-Glycerole23
DB06755BCRBeta carotene16
DB07640DCQ2-decyl-5,6-dimethoxy-3-methylcyclohexa-2,5-diene-1,4-dione13
DB11457970Rotenone7
DB02659CHDCholic Acid6
DB02686UMQUndecyl-Beta-D-Maltopyranoside6
DB09270U10Ubidecarenone6
DB02306CPLPalmitoyl-Linoleoyl Phosphatidylcholine5
DB03426DGDDigalactosyl Diacyl Glycerol (Dgdg)5
DB08689UQ1Ubiquinone Q13
DB00135TYRTyrosine2
DB00157—NADH2
DB01022PQNPhylloquinone2
DB02133CLAChlorophyll A1
DB04506CHLChlorophyll B1
DB04683DR9(2R)-3-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-2-[(9E)-HEXADEC-9-ENOYLOXY]PROPYL (9E)-OCTADEC-9-ENOATE1

Most frequently bound compounds

PDB ligandNameDomains in contact
CDLCARDIOLIPIN832
3PE1,2-Distearoyl-sn-glycerophosphoethanolamine756
PC11,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE526
PEE1,2-dioleoyl-sn-glycero-3-phosphoethanolamine306
PLX(9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,7,10-TRIOXA-2LAMBDA~5~-AZA-6LAMBDA~5~-PHOSPHAOCTACOSANE-6,6,11-TRIOL287
MYRMYRISTIC ACID86
PLCDIUNDECYL PHOSPHATIDYL CHOLINE74
LFAEICOSANE69
UQCoenzyme Q10, (2Z,6E,10Z,14E,18E,22E,26Z)-isomer57
EHZ~{S}-[2-[3-[[(2~{R})-3,3-dimethyl-2-oxidanyl-4-phosphonooxy-butanoyl]amino]propanoylamino]ethyl] (3~{S})-3-oxidanyltetradecanethioate47
PGT(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE45
PTYPHOSPHATIDYLETHANOLAMINE43
8Q1S-[2-({N-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alanyl}amino)ethyl] dodecanethioate39
UQ9Ubiquinone-935
U10UBIQUINONE-1033
PC7(7S)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5,8-TRIOXA-4-PHOSPHAHEXACOSAN-1-AMINIUM 4-OXIDE30
SQD1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL29
CHDCHOLIC ACID28
LHG1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE26
3PH1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE25