X-group (possible homology)

4126 beta-carbonic anhydrase-like

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Ligands and drugs

580

Member domains

281

with ligand contacts (≤ 4 Å)

48.4% of members

258

with DrugDomain annotations

44.5% of members

137

with a DrugBank compound

23.6% 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)

5.0

Superclasses per 20 proteins

narrower than 83% 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
Homogeneous metal compounds	37	17.9	2.07×	q < 0.0001
Homogeneous non-metal compounds	12	7.9	1.53×	q = 0.15
Organoheterocyclic compounds	3	5.6	0.53×	q = 0.43
Organic oxygen compounds	1	7.3	0.14×	q = 0.01
Nucleosides, nucleotides, and analogues	0	10.1	0	q < 0.0001
Organic acids and derivatives	0	5.6	0	q = 9.2e-3
Organosulfur compounds	6	0.8	7.99×	not tested
Organic nitrogen compounds	1	1.2	0.86×	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
DB09157	CO2	Carbon dioxide	7
DB00819	AZM	Acetazolamide	6
DB03345	BME	Mercaptoethanol	4
DB00536	GAI	Guanidine	2
DB03385	4MZ	4-Methylimidazole	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ZNmetal	ZINC ION	238
CL	CHLORIDE ION	52
RUB	RIBULOSE-1,5-DIPHOSPHATE	12
SCN	THIOCYANATE ION	12
AZM	5-ACETAMIDO-1,3,4-THIADIAZOLE-2-SULFONAMIDE	10
CO2	CARBON DIOXIDE	10
MGmetal	MAGNESIUM ION	9
CUmetal	COPPER (II) ION	8
AZI	AZIDE ION	6
CDmetal	CADMIUM ION	6
COmetal	COBALT (II) ION	6
BME	BETA-MERCAPTOETHANOL	4
CAmetal	CALCIUM ION	4
6OU	[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl] (~{Z})-octadec-9-enoate	3
Kmetal	POTASSIUM ION	3
GAI	GUANIDINE	2
IOD	IODIDE ION	2
NAmetal	SODIUM ION	2
4MZ	4-METHYLIMIDAZOLE	1
FUS	sulfuric diamide	1