X-group (possible homology)

813 Chalcone isomerase

Open in classification tree →

Ligands and drugs

179

Member domains

with ligand contacts (≤ 4 Å)

34.6% of members

with DrugDomain annotations

17.3% of members

with a DrugBank compound

16.8% 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.

Proteins with classified ligands

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.

Superclass	Proteins	Expected	Ratio	Significance
Phenylpropanoids and polyketides	3	0.1	21×	not tested
Lipids and lipid-like molecules	2	0.8	2.60×	not tested
Organic acids and derivatives	1	1.1	0.94×	not tested
Homogeneous metal compounds	2	3.4	0.59×	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

DrugBank	PDB ligand	Name	Domains
DB03467	NAR	Naringenin	7
DB03601	DFV	5-deoxyflavanone	5
DB03017	DAO	Lauric acid	2
DB04429	DFL	4'-Hydroxyflavanone	2
DB03285	HCC	Isoliquiritigenin	1
DB03796	PLM	Palmitic Acid	1
DB04274	DDC	(2S)-7-hydroxyflavanone	1
DB08845	AKG	Oxogluric acid	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAR	NARINGENIN	11
CL	CHLORIDE ION	10
DFV	7-HYDROXY-2-(4-HYDROXY-PHENYL)-CHROMAN-4-ONE	9
CAmetal	CALCIUM ION	2
DAO	LAURIC ACID	2
DFL	2-(4-HYDROXY-PHENYL)-CHROMAN-4-ONE	2
Kmetal	POTASSIUM ION	2
AKG	2-OXOGLUTARIC ACID	1
DDC	7-HYDROXY-2-PHENYL-CHROMAN-4-ONE	1
HCC	2',4,4'-TRIHYDROXYCHALCONE	1
MGmetal	MAGNESIUM ION	1
PLM	PALMITIC ACID	1