X-group (possible homology)

593 GroEL equatorial domain-like

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Ligands and drugs

5,021

Member domains

2,003

with ligand contacts (≤ 4 Å)

39.9% of members

1,450

with DrugDomain annotations

28.9% of members

1,428

with a DrugBank compound

28.4% 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)

3.0

Superclasses per 20 proteins

narrower than 95% 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.

Superclass	Proteins	Expected	Ratio	Significance
Nucleosides, nucleotides, and analogues	31	8.7	3.55×	q < 0.0001
Homogeneous metal compounds	32	15.5	2.07×	q < 0.0001
Homogeneous non-metal compounds	0	6.8	0	q = 2.0e-3
Organic oxygen compounds	0	6.3	0	q = 3.2e-3
Mixed metal/non-metal compounds	22	0.7	33×	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
DB16833	ADP	Adenosine disphosphate	892
DB00171	ATP	ATP	377
DB02930	AGS	Adenosine 5'-[gamma-thio]triphosphate	74
DB04395	—	Phosphoaminophosphonic Acid-Adenylate Ester	1
DB09130	—	—	1
DB11638	—	—	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MGmetal	MAGNESIUM ION	1,569
ADP	ADENOSINE-5'-DIPHOSPHATE	1,212
Kmetal	POTASSIUM ION	586
AF3	ALUMINUM FLUORIDE	573
ATP	ADENOSINE-5'-TRIPHOSPHATE	559
BEF	BERYLLIUM TRIFLUORIDE ION	225
AGS	PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER	60
HEZ	HEXANE-1,6-DIOL	42
BME	BETA-MERCAPTOETHANOL	40
A1AS6	N-(2-{4-[4-(aminomethyl)benzene-1-sulfonamido]phenyl}-1,3-benzoxazol-5-yl)-5-chlorothiophene-2-sulfonamide	28
TLmetal	THALLIUM (I) ION	28
CAmetal	CALCIUM ION	24
ANP	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER	20
TAM	TRIS(HYDROXYETHYL)AMINOMETHANE	4