X-group (possible homology)

284 FKBP-like

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Ligands and drugs

5,041

Member domains

910

with ligand contacts (≤ 4 Å)

18.1% of members

673

with DrugDomain annotations

13.4% of members

411

with a DrugBank compound

8.2% 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)

9.3

Superclasses per 20 proteins

broader than 84% 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
Organoheterocyclic compounds	24	11.2	2.14×	q = 6.5e-4
Organic oxygen compounds	22	14.5	1.51×	q = 0.06
Homogeneous non-metal compounds	16	15.7	1.02×	q = 0.93
Benzenoids	5	5.3	0.94×	q = 1.00
Organic acids and derivatives	10	11.3	0.89×	q = 0.92
Homogeneous metal compounds	14	35.8	0.39×	q < 0.0001
Lipids and lipid-like molecules	3	8.1	0.37×	q = 0.10
Nucleosides, nucleotides, and analogues	1	20.2	0.05×	q < 0.0001
Phenylpropanoids and polyketides	30	1.5	20×	not tested
Alkaloids and derivatives	2	0.3	8.03×	not tested
Organosulfur compounds	3	1.5	2.00×	not tested
Mixed metal/non-metal compounds	1	1.5	0.65×	not tested
Organic nitrogen compounds	1	2.3	0.43×	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
DB00864	FK5	Tacrolimus	59
DB00141	NAG	N-Acetylglucosamine	34
DB00877	RAP	Sirolimus	27
DB04404	AMI	Allosamizoline	17
DB02042	1PG	2-(2-{2-[2-(2-Methoxy-Ethoxy)-Ethoxy]-Ethoxy}-Ethoxy)-Ethanol	8
DB18065	QGB	5-(4-((2S,5S)-5-(4-chlorobenzyl)-2-methylmorpholino)piperidin-1-yl)-1H-1,2,4-triazol-3-amine	6
DB03747	NGT	N-Acetyl-glucosamine thiazoline	4
DB00201	CFF	Caffeine	3
DB02888	001	FKB-001	3
DB00277	TEP	Theophylline	2
DB00806	PNX	Pentoxifylline	2
DB01723	AP1	{3-[3-(3,4-Dimethoxy-Phenyl)-1-(1-{1-[2-(3,4,5-Trimethoxy-Phenyl)-Butyryl]-Piperidin-2yl}-Vinyloxy)-Propyl]-Phenoxy}-Acetic Acid	2
DB01822	DTD	(4R,5R)-1,2-dithiane-4,5-diol	2
DB02311	DSS	Methyl Methylsulfinylmethyl Sulfide	2
DB02414	CHQ	Cyclo(his-pro)	2
DB02693	D1D	(4S,5S)-1,2-dithiane-4,5-diol	2
DB03539	ALI	2-(Acetylamino)-2-Deoxy-6-O-Methyl-Alpha-D-Allopyranose	2
DB03621	587	L-709,587	2
DB04094	BUQ	4-hydroxybutan-2-one	2
DB04115	BER	Berberine	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
FK5	8-DEETHYL-8-[BUT-3-ENYL]-ASCOMYCIN	62
CL	CHLORIDE ION	54
RAP	RAPAMYCIN IMMUNOSUPPRESSANT DRUG	33
NAmetal	SODIUM ION	24
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	24
CAmetal	CALCIUM ION	21
MGmetal	MAGNESIUM ION	21
AMI	ALLOSAMIZOLINE	19
12P	DODECAETHYLENE GLYCOL	15
ZNmetal	ZINC ION	14
1PG	2-(2-{2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHANOL	9
DW0	1,1'-PROPANE-1,3-DIYLBIS(3,7-DIMETHYL-3,7-DIHYDRO-1H-PURINE-2,6-DIONE)	7
R27	N'-[(3S,4R,5S,8R,9E,12S,14S,15R,16S,18R,19R,26aS)-5,19-dihydroxy-3-{(1E)-1-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]prop-1-en-2-yl}-14,16-dimethoxy-4,10,12,18-tetramethyl-1,20,21-trioxo-8-(prop-2-en-1-yl)-1,3,4,5,6,8,11,12,13,14,15,16,17,18,19,20,21,23,24,25,26,26a-docosahydro-7H-15,19-epoxypyrido[2,1-c][1,4]oxazacyclotricosin-7-ylidene]acetohydrazide	7
861	3-(3,4,5-trimethoxyphenyl)propyl (2S)-1-(benzylsulfonyl)piperidine-2-carboxylate	6
CDmetal	CADMIUM ION	6
CX9	3,7-DIMETHYL-1-[3-(3-METHYL-2,6-DIOXO-9H-PURIN-1-YL)PROPYL]PURINE-2,6-DIONE	6
QGB	5-(4-((2S,5S)-5-(4-chlorobenzyl)-2-methylmorpholino)piperidin-1-yl)-4H-1,2,4-triazol-3-amine	6
NImetal	NICKEL (II) ION	5
UUI	(1S,5S,6R)-10-[[3,5-bis(chloranyl)phenyl]sulfonimidoyl]-5-ethenyl-3-(pyridin-2-ylmethyl)-3,10-diazabicyclo[4.3.1]decan-2-one	5
0BF	8-(2-chloranylethanoyl)-4-[(5-naphthalen-1-ylfuran-2-yl)methyl]-1-thia-4,8-diazaspiro[4.5]decan-3-one	4