X-group (possible homology)

7502 Anticodon-binding domain of Class II aaRS

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Ligands and drugs

3,783

Member domains

133

with ligand contacts (≤ 4 Å)

3.5% of members

with DrugDomain annotations

2.1% of members

with a DrugBank compound

1.1% 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
Organosulfur compounds	1	0.2	4.93×	not tested
Homogeneous non-metal compounds	7	2.1	3.30×	not tested
Organic acids and derivatives	2	1.5	1.31×	not tested
Lipids and lipid-like molecules	1	1.1	0.91×	not tested
Organoheterocyclic compounds	1	1.5	0.66×	not tested
Homogeneous metal compounds	3	4.8	0.62×	not tested
Nucleosides, nucleotides, and analogues	1	2.7	0.37×	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
DB00117	HIS	Histidine	4
DB03869	SSA	5'-O-(L-Serylsulfamoyl)adenosine	4
DB00156	—	Threonine	2
DB03345	BME	Mercaptoethanol	2
DB00142	—	Glutamic acid	1
DB00145	GLY	Glycine	1
DB00172	—	Proline	1
DB02210	HEZ	Hexane-1,6-Diol	1
DB02510	—	5'-O-(L-Prolylsulfamoyl)adenosine	1
DB02684	—	5'-O-(L-Cysteinylsulfamoyl)adenosine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	21
MGmetal	MAGNESIUM ION	16
CAmetal	CALCIUM ION	7
HIS	HISTIDINE	4
SSA	5'-O-(N-(L-SERYL)-SULFAMOYL)ADENOSINE	4
ZNmetal	ZINC ION	4
A1IK1	1-[(4S)-8-chloranyl-3,4-dihydro-2H-chromen-4-yl]-3-(1-phenylpyrazol-3-yl)urea	2
0P6	2-aminoquinolin-8-ol	1
BME	BETA-MERCAPTOETHANOL	1
BR	BROMIDE ION	1
F	FLUORIDE ION	1
GLY	GLYCINE	1
IOD	IODIDE ION	1
Kmetal	POTASSIUM ION	1
SRmetal	STRONTIUM ION	1