X-group (possible homology)

4182 Agglutinin HPA-like

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Ligands and drugs

145

Member domains

with ligand contacts (≤ 4 Å)

39.3% of members

with DrugDomain annotations

29.7% of members

with a DrugBank compound

18.6% 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
Homogeneous metal compounds	6	5.3	1.13×	q = 0.83
Organic oxygen compounds	5	2.2	2.31×	not tested
Homogeneous non-metal compounds	5	2.3	2.14×	not tested
Organic acids and derivatives	1	1.7	0.60×	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
DB03567	A2G	alpha-N-Acetyl-D-galactosamine	10
DB00141	NAG	N-Acetylglucosamine	3
DB00133	SER	Serine	1
DB04046	MBG	Methyl beta-galactoside	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CAmetal	CALCIUM ION	22
CL	CHLORIDE ION	17
NAmetal	SODIUM ION	15
MGmetal	MAGNESIUM ION	13
A2G	2-acetamido-2-deoxy-alpha-D-galactopyranose	5
GLA	alpha-D-galactopyranose	4
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	3
NGA	2-acetamido-2-deoxy-beta-D-galactopyranose	3
AZI	AZIDE ION	2
MRD	(4R)-2-METHYLPENTANE-2,4-DIOL	2
ZNmetal	ZINC ION	2
BR	BROMIDE ION	1
MBG	methyl beta-D-galactopyranoside	1
SO3	SULFITE ION	1