X-group (possible homology)

2485 Thioredoxin-like

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Ligands and drugs

18,696

Member domains

4,037

with ligand contacts (≤ 4 Å)

21.6% of members

3,588

with DrugDomain annotations

19.2% of members

2,318

with a DrugBank compound

12.4% 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.

407

Proteins with classified ligands

Superclasses bound (of 23)

8.0

Superclasses per 20 proteins

broader than 58% of the 256 X-groups with enough proteins to compare (median 7.6)

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
Organic acids and derivatives	234	62.1	3.77×	q < 0.0001
Organosulfur compounds	13	8.3	1.57×	q = 0.16
Phenylpropanoids and polyketides	12	8.4	1.44×	q = 0.28
Homogeneous non-metal compounds	92	86.4	1.06×	q = 0.58
Benzenoids	28	29.3	0.95×	q = 0.96
Organic nitrogen compounds	8	12.8	0.63×	q = 0.26
Homogeneous metal compounds	106	197.0	0.54×	q < 0.0001
Mixed metal/non-metal compounds	4	8.4	0.47×	q = 0.22
Organic oxygen compounds	35	79.9	0.44×	q < 0.0001
Organoheterocyclic compounds	25	61.8	0.41×	q < 0.0001
Lipids and lipid-like molecules	12	44.7	0.27×	q < 0.0001
Nucleosides, nucleotides, and analogues	14	110.9	0.13×	q < 0.0001
Organic salts	2	0.4	4.79×	not tested
Organohalogen compounds	1	1.1	0.88×	not tested
Alkaloids and derivatives	1	1.4	0.73×	not tested
Hydrocarbons	1	2.8	0.36×	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
DB00143	GSH	Glutathione	808
DB03247	FMN	Flavin mononucleotide	62
DB03793	BEZ	Benzoic acid	40
DB03003	GTS	Glutathione sulfonic acid	37
DB03310	GDS	Glutathione disulfide	37
DB03686	GTB	S-(4-nitrobenzyl)glutathione	33
DB02175	MLA	Malonic acid	26
DB02458	GDN	S-(2,4-dinitrophenyl)glutathione	23
DB00903	EAA	Etacrynic acid	21
DB03434	MPO	3-(N-morpholino)propanesulfonic acid	21
DB00141	NAG	N-Acetylglucosamine	17
DB01692	DTU	Dithioerythritol	16
DB01536	ASD	Androstenedione	15
DB03147	FAD	Flavin adenine dinucleotide	14
DB09130	—	—	13
DB04187	GPS	(9S,10S)-9-(S-glutathionyl)-10-hydroxy-9,10-dihydrophenanthrene	11
DB09110	COM	Coenzyme M	11
DB00139	SIN	Succinic acid	10
DB01834	GPR	(9R,10R)-9-(S-glutathionyl)-10-hydroxy-9,10-dihydrophenanthrene	10
DB04022	G4P	Guanosine tetraphosphate	10

Most frequently bound compounds

PDB ligand	Name	Domains in contact
GSH	Glutathione	843
FES	FE2/S2 (INORGANIC) CLUSTER	588
CL	CHLORIDE ION	268
CAmetal	CALCIUM ION	176
NAmetal	SODIUM ION	108
ZNmetal	ZINC ION	91
CUmetal	COPPER (II) ION	77
SF4	IRON/SULFUR CLUSTER	76
GTX	S-HEXYLGLUTATHIONE	75
FMN	FLAVIN MONONUCLEOTIDE	62
Kmetal	POTASSIUM ION	58
BEZ	BENZOIC ACID	40
LMR	(2S)-2-hydroxybutanedioic acid	39
GDS	OXIDIZED GLUTATHIONE DISULFIDE	37
GTS	GLUTATHIONE SULFONIC ACID	35
GTB	S-(P-NITROBENZYL)GLUTATHIONE	33
MGmetal	MAGNESIUM ION	33
CDmetal	CADMIUM ION	31
MLA	MALONIC ACID	26
7WB	(2Z)-2-indol-3-ylidene-3H-1,3-thiazole	24