X-group (possible homology)

3787 HAD superfamily helical bundle insertion domain

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Ligands and drugs

135

Member domains

with ligand contacts (≤ 4 Å)

33.3% of members

with DrugDomain annotations

30.4% of members

with a DrugBank compound

28.1% 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.

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	0.1	16×	not tested
Benzenoids	1	0.2	4.62×	not tested
Nucleosides, nucleotides, and analogues	2	0.8	2.45×	not tested
Organic oxygen compounds	1	0.6	1.70×	not tested
Homogeneous non-metal compounds	1	0.6	1.57×	not tested
Homogeneous metal compounds	1	1.5	0.69×	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
DB00171	ATP	ATP	6
DB01972	5GP	Guanosine-5'-Monophosphate	5
DB03222	DTP	dATP	3
DB04566	IMP	Inosinic Acid	3
DB00640	ADN	Adenosine	1
DB03685	U5P	Uridine monophosphate	1
DB04457	DG	2'-Deoxyguanosine-5'-Monophosphate	1
DB06408	—	Taribavirin	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ATP	ADENOSINE-5'-TRIPHOSPHATE	6
5GP	GUANOSINE-5'-MONOPHOSPHATE	5
DTP	2'-DEOXYADENOSINE 5'-TRIPHOSPHATE	3
IMP	INOSINIC ACID	3
DG2	(2R)-2,3-diphosphoglyceric acid	2
MGmetal	MAGNESIUM ION	2
11H	9,10-dioxo-9,10-dihydroanthracene-2,6-disulfonic acid	1
ADN	ADENOSINE	1
B4P	BIS(ADENOSINE)-5'-TETRAPHOSPHATE	1
CL	CHLORIDE ION	1
SCN	THIOCYANATE ION	1
U5P	URIDINE-5'-MONOPHOSPHATE	1