X-group (possible homology)

7546 Glutaminase/Asparaginase N-terminal domain

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Ligands and drugs

694

Member domains

447

with ligand contacts (≤ 4 Å)

64.4% of members

401

with DrugDomain annotations

57.8% of members

383

with a DrugBank compound

55.2% 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	5	9.2	0.54×	q = 0.10
Nucleosides, nucleotides, and analogues	0	5.2	0	q = 7.4e-3
Organic acids and derivatives	18	2.9	6.21×	not tested
Homogeneous non-metal compounds	2	4.0	0.50×	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
DB00128	ASP	Aspartic acid	146
DB00174	ASN	Asparagine	65
DB00142	GLU	Glutamic acid	52
DB03943	DSG	D-Asparagine	10
DB00139	SIN	Succinic acid	7
DB02233	DDO	6-hydroxy-D-norleucine	4
DB02517	DGL	D-Glutamic Acid	4
DB02655	DAS	D-Aspartic Acid	4
DB03412	LDO	6-hydroxynorleucine	4
DB02571	DO2	Allysine	2
DB04388	CAB	4,4-dihydroxy-5-oxo-L-norvaline	2
DB00721	—	—	1
DB19171	4CS	Ectoine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ASP	ASPARTIC ACID	162
ASN	ASPARAGINE	65
GLU	GLUTAMIC ACID	52
CL	CHLORIDE ION	19
MGmetal	MAGNESIUM ION	14
DSG	D-ASPARAGINE	10
SIN	SUCCINIC ACID	6
ZNmetal	ZINC ION	6
DAS	D-ASPARTIC ACID	4
DDO	6-HYDROXY-D-NORLEUCINE	4
DGL	D-GLUTAMIC ACID	4
LDO	6-HYDROXY-L-NORLEUCINE	4
CAB	4,4-dihydroxy-5-oxo-L-norvaline	2
DO2	5,5-dihydroxy-6-oxo-L-norleucine	2
4CS	(4S)-2-METHYL-1,4,5,6-TETRAHYDROPYRIMIDINE-4-CARBOXYLIC ACID	1
CAmetal	CALCIUM ION	1
GLY	GLYCINE	1