X-group (possible homology)

6151 Helical bundle domain in S46 peptidase

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Ligands and drugs

118

Member domains

with ligand contacts (≤ 4 Å)

72.9% of members

with DrugDomain annotations

68.6% of members

with a DrugBank compound

37.3% 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
Organic acids and derivatives	5	0.9	5.46×	not tested
Organic nitrogen compounds	1	0.2	5.30×	not tested
Benzenoids	1	0.4	2.31×	not tested
Homogeneous non-metal compounds	2	1.3	1.57×	not tested
Organoheterocyclic compounds	1	0.9	1.10×	not tested
Organic oxygen compounds	1	1.2	0.85×	not tested
Homogeneous metal compounds	2	2.9	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
DB00161	VAL	Valine	14
DB00135	TYR	Tyrosine	12
DB00125	ARG	Arginine	6
DB00149	LEU	Leucine	4
DB00128	ASP	Aspartic acid	3
DB00142	GLU	Glutamic acid	3
DB00120	PHE	Phenylalanine	2
DB00174	ASN	Asparagine	2
DB02884	ALC	3-Cyclohexyl-L-alanine	2
DB04349	PGO	(S)-propane-1,2-diol	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ZNmetal	ZINC ION	33
CL	CHLORIDE ION	17
VAL	VALINE	14
TYR	TYROSINE	8
ARG	ARGININE	6
LEU	LEUCINE	4
2L1	2-[(4-methyl-1H-imidazol-5-yl)methyl]-1,2,3,4-tetrahydroisoquinoline	2
ALC	2-AMINO-3-CYCLOHEXYL-PROPIONIC ACID	2
ASN	ASPARAGINE	2
GLU	GLUTAMIC ACID	2
I87	(2S)-N,2-dimethyl-N-(propan-2-yl)morpholine-4-sulfonamide	2
I8A	N-(cyclopropylmethyl)-2,2,3,3-tetramethylazetidine-1-carboxamide	2
I8D	(4-chlorophenyl)(thiomorpholin-4-yl)methanone	2
I8G	2-(4-fluorophenoxy)-1-(pyrrolidin-1-yl)ethan-1-one	2
I8J	5-fluoro-1-(1-methylcyclopropane-1-sulfonyl)-1,2,3,6-tetrahydropyridine	2
K0G	N-phenyl-N'-pyridin-3-ylurea	2
NT7	N-(2,3-dimethylphenyl)-2-(morpholin-4-yl)acetamide	2
NU4	2-methyl-N-(pyridin-4-yl)furan-3-carboxamide	2
O2A	N-methyl-1H-indole-7-carboxamide	2
PHE	PHENYLALANINE	2