X-group (possible homology)

7561 Isochorismatase-like hydrolases

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Ligands and drugs

675

Member domains

215

with ligand contacts (≤ 4 Å)

31.9% of members

208

with DrugDomain annotations

30.8% of members

101

with a DrugBank compound

15.0% 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)

6.4

Superclasses per 20 proteins

narrower than 69% 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 non-metal compounds	10	5.3	1.89×	q = 0.05
Homogeneous metal compounds	13	12.1	1.07×	q = 0.89
Nucleosides, nucleotides, and analogues	0	6.8	0	q = 1.3e-3
Organometallic compounds	1	0.0	28×	not tested
Organic acids and derivatives	9	3.8	2.36×	not tested
Organosulfur compounds	1	0.5	1.97×	not tested
Organoheterocyclic compounds	4	3.8	1.05×	not tested
Organic oxygen compounds	1	4.9	0.20×	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
DB03345	BME	Mercaptoethanol	8
DB04161	ROP	Propionamide	8
DB04299	MAE	Maleic acid	8
DB00627	NIO	Niacin	6
DB02701	NCA	Nicotinamide	4
DB02994	CAD	Cacodylic acid	4
DB02793	ISC	Isochorismic Acid	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ZNmetal	ZINC ION	60
CL	CHLORIDE ION	28
C5J	dicarbonimidic diamide	14
URP	N-(AMINOCARBONYL)-BETA-ALANINE	12
MGmetal	MAGNESIUM ION	9
NAmetal	SODIUM ION	9
BME	BETA-MERCAPTOETHANOL	8
HX2	(2R,5R)-hexane-2,5-diol	8
MAE	MALEIC ACID	8
ROP	PROPIONAMIDE	8
NIO	NICOTINIC ACID	6
CAmetal	CALCIUM ION	5
C5S	N-formyl-D-aspartic acid	4
CAD	CACODYLIC ACID	4
NCA	NICOTINAMIDE	4
TIU	tricarbonodiimidic diamide	4
FE2metal	FE (II) ION	3
IOD	IODIDE ION	2
ISC	(5S,6S)-5-[(1-carboxyethenyl)oxy]-6-hydroxycyclohexa-1,3-diene-1-carboxylic acid	2
LYS	LYSINE	2