X-group (possible homology)

4156 Sec63 N-terminal subdomain-like

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Ligands and drugs

1,414

Member domains

with ligand contacts (≤ 4 Å)

5.4% of members

with DrugDomain annotations

3.1% of members

with a DrugBank compound

2.0% 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)

—

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 non-metal compounds	5	1.7	2.94×	not tested
Benzenoids	1	0.6	1.73×	not tested
Organic oxygen compounds	1	1.6	0.64×	not tested
Nucleosides, nucleotides, and analogues	1	2.2	0.46×	not tested
Homogeneous metal compounds	1	3.9	0.26×	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
DB00259	SAN	Sulfanilamide	2
DB04349	PGO	(S)-propane-1,2-diol	1
DB13726	QA9	Sulfaguanidine	1
DB16833	ADP	Adenosine disphosphate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	7
WCN	(4P)-N-{5-[(4-chlorophenyl)methoxy]-1,3,4-thiadiazol-2-yl}-4-(2-methoxyphenyl)pyridine-3-carboxamide	6
SAN	SULFANILAMIDE	3
Kmetal	POTASSIUM ION	2
ADP	ADENOSINE-5'-DIPHOSPHATE	1
AGS	PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER	1
BR	BROMIDE ION	1
MPO	3[N-MORPHOLINO]PROPANE SULFONIC ACID	1
PGO	S-1,2-PROPANEDIOL	1
POL	N-PROPANOL	1
Q96	3-azanyl-~{N}-methyl-4-(methylamino)benzenesulfonamide	1
QA9	1-(4-aminophenyl)sulfonylguanidine	1
QAU	3-oxidanylbenzenesulfonamide	1
QB6	3-azanyl-4-oxidanyl-benzenesulfonamide	1