X-group (possible homology)

1114 Serine acetyltransferase N-terminal domain

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Ligands and drugs

140

Member domains

with ligand contacts (≤ 4 Å)

54.3% of members

with DrugDomain annotations

50.7% of members

with a DrugBank compound

41.4% 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	2	5.3	0.38×	q = 0.10
Organic acids and derivatives	9	1.7	5.36×	not tested
Organic oxygen compounds	2	2.2	0.93×	not tested
Homogeneous non-metal compounds	2	2.3	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
DB00151	CYS	Cysteine	37
DB00133	SER	Serine	4
DB00125	ARG	Arginine	3
DB02078	PG5	Triglyme	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CYS	CYSTEINE	45
MGmetal	MAGNESIUM ION	13
NAmetal	SODIUM ION	7
SER	SERINE	5
LMR	(2S)-2-hydroxybutanedioic acid	4
ARG	ARGININE	3
15P	POLYETHYLENE GLYCOL (N=34)	2
CL	CHLORIDE ION	2
PG5	1-METHOXY-2-[2-(2-METHOXY-ETHOXY]-ETHANE	1