X-group (possible homology)

3757 AF1503 pre-HAMP domain

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Ligands and drugs

Member domains

with ligand contacts (≤ 4 Å)

44.3% of members

with DrugDomain annotations

38.6% of members

with a DrugBank compound

25.7% 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
Mixed metal/non-metal compounds	2	0.0	48×	not tested
Benzenoids	1	0.1	6.94×	not tested
Homogeneous non-metal compounds	2	0.4	4.71×	not tested
Organic oxygen compounds	1	0.4	2.55×	not tested
Homogeneous metal compounds	1	1.0	1.03×	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
DB00141	NAG	N-Acetylglucosamine	8
DB09353	PS9	Octasulfur	4
DB04445	HGI	Mercuric iodide	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	8
1KW	ortho-carborane	4
8P0	pyrene	4
NPY	NAPHTHALENE	4
PS9	octathiocane	4
HGI	MERCURY (II) IODIDE	3
HGN	mercuriomercury	3
BEQ	N-(CARBOXYMETHYL)-N,N-DIMETHYL-3-[(1-OXODODECYL)AMINO]-1-PROPANAMINIUM INNER SALT	2
IOD	IODIDE ION	2
NAmetal	SODIUM ION	1