X-group (possible homology)

105 HLH-like

Ligands and drugs

1,900
Member domains
117
with ligand contacts (≤ 4 Å)
6.2% of members
85
with DrugDomain annotations
4.5% of members
39
with a DrugBank compound
2.1% 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.

16
Proteins with classified ligands
5
Superclasses bound (of 23)
—
Superclasses per 20 proteins
fewer than 20 proteins: too few to compare at equal depth

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 compounds87.71.03×q = 1.00
Homogeneous non-metal compounds63.41.77×not tested
Lipids and lipid-like molecules21.81.14×not tested
Organic acids and derivatives12.40.41×not tested
Organic oxygen compounds13.10.32×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
DB02210HEZHexane-1,6-Diol2
DB00141NAGN-Acetylglucosamine1
DB00338——1
DB00379——1
DB00393——1
DB00499—Flutamide1
DB01076—Atorvastatin1
DB01097——1
DB02052—Indirubin-3'-monoxime1
DB02709—Resveratrol1
DB02736ACMAcetamide1
DB04216—Quercetin1
DB06083——1
DB06732——1
DB07715—Emodin1
DB08624——1
DB08995——1
DB11937—Kynurenic Acid1
DB12116—Epigallocatechin gallate1
DB12255—Vadadustat1

Most frequently bound compounds

PDB ligandNameDomains in contact
CLCHLORIDE ION33
NAmetalSODIUM ION13
V7J2-(2,5-dioxopyrrolidin-1-yl)acetamide6
ER3metalERBIUM (III) ION4
ZNmetalZINC ION4
KmetalPOTASSIUM ION3
A1IS41-(3-chlorophenyl)-6-[2-(1-oxidanylcyclohexyl)ethynyl]indole-2-carboxylic acid2
A1IS56-[2-(1-oxidanylcyclohexyl)ethynyl]-1-phenyl-indole-2-carboxylic acid2
A1IS65-chloranyl-3-phenyl-1H-indole-2-carboxylic acid2
A1IS74-methyl-6-[2-(1-oxidanylcyclohexyl)ethynyl]-1-phenyl-indole-2-carboxylic acid2
A1ISF1-(2-phenylethynyl)cyclohexan-1-ol2
CAmetalCALCIUM ION2
HGmetalMERCURY (II) ION2
JEFO-(O-(2-AMINOPROPYL)-O'-(2-METHOXYETHYL)POLYPROPYLENE GLYCOL 500)2
MGmetalMAGNESIUM ION2
MV07-acetyl-4-methoxy-1-benzofuran-3(2H)-one2
A1CAO(5M)-5-(3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)-2-phenoxybenzene-1-sulfonic acid1
BMEBETA-MERCAPTOETHANOL1
FEmetalFE (III) ION1
HEZHEXANE-1,6-DIOL1