X-group (possible homology)

191 Tetracyclin repressor-like, C-terminal domain

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Ligands and drugs

2,247

Member domains

816

with ligand contacts (≤ 4 Å)

36.3% of members

753

with DrugDomain annotations

33.5% of members

487

with a DrugBank compound

21.7% 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)

10.0

Superclasses per 20 proteins

broader than 93% 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
Benzenoids	16	6.7	2.39×	q = 2.4e-3
Lipids and lipid-like molecules	19	10.2	1.86×	q = 0.01
Organoheterocyclic compounds	22	14.1	1.56×	q = 0.05
Homogeneous non-metal compounds	26	19.7	1.32×	q = 0.18
Homogeneous metal compounds	26	45.0	0.58×	q = 2.1e-4
Organic oxygen compounds	9	18.3	0.49×	q = 0.02
Organic acids and derivatives	5	14.2	0.35×	q = 0.01
Nucleosides, nucleotides, and analogues	2	25.4	0.08×	q < 0.0001
Alkaloids and derivatives	6	0.3	19×	not tested
Phenylpropanoids and polyketides	11	1.9	5.77×	not tested
Organic nitrogen compounds	6	2.9	2.05×	not tested
Organosulfur compounds	3	1.9	1.59×	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
DB17031	ET	Homidium	22
DB03895	MGR	Malachite Green	19
DB03264	DCC	Dodecyl-Coa	14
DB00406	CVI	Gentian violet cation	12
DB04209	DEQ	Dequalinium	12
DB03309	NHE	N-cyclohexyltaurine	11
DB01017	MIY	Minocycline	8
DB03419	URA	Uracil	8
DB03796	PLM	Palmitic Acid	8
DB03345	BME	Mercaptoethanol	7
DB03825	RHQ	Rhodamine 6G	7
DB00254	DXT	Doxycycline	6
DB00759	TAC	Tetracycline	6
DB01123	PRL	Proflavine	6
DB02709	STL	Resveratrol	6
DB04115	BER	Berberine	6
DB09093	CTC	Chlortetracycline	5
DB01645	GEN	Genistein	4
DB01728	PEF	1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine	4
DB01849	DUC	Dihydrouracil	4

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MGmetal	MAGNESIUM ION	66
CL	CHLORIDE ION	65
ET	ETHIDIUM	20
NAmetal	SODIUM ION	19
MGR	MALACHITE GREEN	17
NHE	2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID	15
DCC	DODECYL-COA	14
TDC	5A,6-ANHYDROTETRACYCLINE	13
CVI	CRYSTAL VIOLET	12
DEQ	DEQUALINIUM	12
NImetal	NICKEL (II) ION	12
CAmetal	CALCIUM ION	8
MIY	(4S,4AS,5AR,12AS)-4,7-BIS(DIMETHYLAMINO)-3,10,12,12A-TETRAHYDROXY-1,11-DIOXO-1,4,4A,5,5A,6,11,12A-OCTAHYDROTETRACENE-2-CARBOXAMIDE	8
PLM	PALMITIC ACID	8
RHQ	RHODAMINE 6G	8
UNL	Unknown ligand	8
URA	URACIL	8
XVR	(5S)-5-[(6R)-6-hydroxy-6-methyl-5-oxooctyl]furan-2(5H)-one	8
ZCT	2,2'-[(1R,1'R,3S,3'S)-6,6',9,9'-tetrahydroxy-1,1'-dimethyl-5,5',10,10'-tetraoxo-3,3',4,4',5,5',10,10'-octahydro-1H,1'H-8,8'-bibenzo[g]isochromene-3,3'-diyl]diacetic acid	8
6HY	4-oxidanylidene-4-(6-oxidanylidene-1~{H}-pyridin-3-yl)butanoic acid	6