X-group (possible homology)

261 Hect, E3 ligase catalytic domain

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Ligands and drugs

409

Member domains

with ligand contacts (≤ 4 Å)

11.2% of members

with DrugDomain annotations

7.3% of members

with a DrugBank compound

4.4% 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)

—

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
Organosulfur compounds	1	0.2	6.16×	not tested
Organic nitrogen compounds	1	0.3	3.97×	not tested
Benzenoids	2	0.6	3.47×	not tested
Homogeneous non-metal compounds	3	1.7	1.77×	not tested
Homogeneous metal compounds	4	3.9	1.03×	not tested
Organoheterocyclic compounds	1	1.2	0.82×	not tested
Organic oxygen compounds	1	1.6	0.64×	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
DB04447	DTT	1,4-Dithiothreitol	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAmetal	SODIUM ION	10
WHL	N,N'-(1,4-phenylene)diacetamide	8
A1AIV	4-aminobutanenitrile	7
ZNmetal	ZINC ION	7
CL	CHLORIDE ION	3
AYE	prop-2-en-1-amine	2
CAmetal	CALCIUM ION	2
TJQ	ethyl 5-[1,3-benzodioxol-5-ylmethyl(ethyl)carbamoyl]-2,4-dimethyl-1~{H}-pyrrole-3-carboxylate	2
04E	iodoacetic acid	1
4YU	methyl (2E)-4-{[(5-methoxy-1,2-dimethyl-1H-indol-3-yl)carbonyl]amino}but-2-enoate	1
A1ITH	Norclomipramine	1
A1ITT	ethyl 4-[4-(2-chloranyl-5,6-dihydrobenzo[b][1]benzazepin-11-yl)butylamino]butanoate	1
DTT	2,3-DIHYDROXY-1,4-DITHIOBUTANE	1
SCN	THIOCYANATE ION	1
SY8	5-azanylpentan-2-one	1
UNX	UNKNOWN ATOM OR ION	1