X-group (possible homology)

8002 Zn-binding domain in glutaminyl-tRNA synthetase

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Ligands and drugs

270

Member domains

with ligand contacts (≤ 4 Å)

24.1% of members

with DrugDomain annotations

19.3% of members

with a DrugBank compound

11.9% 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	8	7.7	1.03×	q = 1.00
Organic acids and derivatives	3	2.4	1.23×	not tested
Homogeneous non-metal compounds	4	3.4	1.18×	not tested
Nucleosides, nucleotides, and analogues	5	4.4	1.15×	not tested
Organic oxygen compounds	1	3.1	0.32×	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
DB00171	ATP	ATP	11
DB00142	GLU	Glutamic acid	6
DB00131	AMP	Adenosine phosphate	5
DB02510	—	5'-O-(L-Prolylsulfamoyl)adenosine	1
DB02684	—	5'-O-(L-Cysteinylsulfamoyl)adenosine	1
DB04447	DTT	1,4-Dithiothreitol	1
DB16833	ADP	Adenosine disphosphate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	14
ATP	ADENOSINE-5'-TRIPHOSPHATE	12
GSU	O5'-(L-GLUTAMYL-SULFAMOYL)-ADENOSINE	9
ZNmetal	ZINC ION	7
GLU	GLUTAMIC ACID	5
AMP	ADENOSINE MONOPHOSPHATE	4
QSI	5'-O-[N-(L-GLUTAMINYL)-SULFAMOYL]ADENOSINE	4
COmetal	COBALT (II) ION	2
ADP	ADENOSINE-5'-DIPHOSPHATE	1
DTT	2,3-DIHYDROXY-1,4-DITHIOBUTANE	1
HGmetal	MERCURY (II) ION	1
MNmetal	MANGANESE (II) ION	1
P6G	HEXAETHYLENE GLYCOL	1