X-group (possible homology)

75 Cyclophilin-like

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Ligands and drugs

1,769

Member domains

353

with ligand contacts (≤ 4 Å)

20.0% of members

261

with DrugDomain annotations

14.8% of members

143

with a DrugBank compound

8.1% 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)

6.9

Superclasses per 20 proteins

narrower than 62% 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	10	5.6	1.77×	q = 0.10
Homogeneous non-metal compounds	11	7.9	1.40×	q = 0.30
Organic oxygen compounds	8	7.3	1.10×	q = 0.75
Homogeneous metal compounds	16	17.9	0.89×	q = 0.70
Organoheterocyclic compounds	5	5.6	0.89×	q = 1.00
Nucleosides, nucleotides, and analogues	0	10.1	0	q < 0.0001
Organophosphorus compounds	1	0.0	81×	not tested
Organosulfur compounds	1	0.8	1.33×	not tested
Benzenoids	2	2.7	0.75×	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
DB00172	PRO	Proline	15
DB00160	ALA	Alanine	5
DB09459	TLA	L-tartaric acid	5
DB00150	TRP	Tryptophan	4
DB02078	PG5	Triglyme	4
DB00133	SER	Serine	3
DB00145	GLY	Glycine	3
DB00091	—	—	2
DB00139	SIN	Succinic acid	2
DB03345	BME	Mercaptoethanol	2
DB03393	SFA	Sanglifehrin A	2
DB03508	ME2	Diethylene glycol ethyl methyl ether	2
DB03904	URE	Urea	2
DB04447	DTT	1,4-Dithiothreitol	2
DB07497	BTI	5-(hexahydro-2-oxo-1H-thieno[3,4-D]imidazol-6-yl)pentanal	2
DB00117	HIS	Histidine	1
DB01742	1P3	(3r)-1-Acetyl-3-Methylpiperidine	1
DB02419	E1P	Ethyl Oxo(Piperidin-1-Yl)Acetate	1
DB03556	PE5	2-(2-{2-[2-(2-{2-[2-(2-Ethoxy-Ethoxy)-Ethoxy]-Ethoxy}-Ethoxy)-Ethoxy]-Ethoxy}-Ethoxy)-Ethanol, Polyethyleneglycol Peg400	1
DB08168	—	Coumarin 120	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	30
ZNI	(1R,5S,6r)-N-[(1P,7S,9S,13S,20M)-20-{5-(4-cyclopropylpiperazin-1-yl)-2-[(1S)-1-methoxyethyl]pyridin-3-yl}-21-ethyl-17,17-dimethyl-8,14-dioxo-15-oxa-4-thia-9,21,27,28-tetraazapentacyclo[17.5.2.1~2,5~.1~9,13~.0~22,26~]octacosa-1(24),2,5(28),19,22,25-hexaen-7-yl]-3-oxabicyclo[3.1.0]hexane-6-carboxamide	30
A1AHB	(1R,2S)-N-[(1P,7S,9S,13R,20M)-21-ethyl-20-{2-[(1R)-1-methoxyethyl]-5-(4-methylpiperazin-1-yl)pyridin-3-yl}-17,17-dimethyl-8,14-dioxo-15-oxa-4-thia-9,21,27,28-tetraazapentacyclo[17.5.2.1~2,5~.1~9,13~.0~22,26~]octacosa-1(24),2,5(28),19,22,25-hexaen-7-yl]-2-methylcyclopropane-1-carboxamide	22
ZNmetal	ZINC ION	10
NAmetal	SODIUM ION	9
CAmetal	CALCIUM ION	8
MGmetal	MAGNESIUM ION	8
PRO	PROLINE	7
Kmetal	POTASSIUM ION	6
P6G	HEXAETHYLENE GLYCOL	6
EA4	ethyl N-[(4-aminobenzyl)carbamoyl]glycinate	5
TLA	L(+)-TARTARIC ACID	5
7HG	3-[(3-hydroxyphenyl)methyl]-10,12-dimethoxy-9,11-dimethyl-6-(propan-2-yl)-19-oxa-1,4,7,25-tetraazabicyclo[19.3.1]pentacosa-13,15-diene-2,5,8,20-tetrone	4
TRP	TRYPTOPHAN	4
WHL	N,N'-(1,4-phenylene)diacetamide	4
ALA	ALANINE	3
GLY	GLYCINE	3
PG5	1-METHOXY-2-[2-(2-METHOXY-ETHOXY]-ETHANE	3
XPE	3,6,9,12,15,18,21,24,27-NONAOXANONACOSANE-1,29-DIOL	3
7I6	1-(4-aminobenzyl)-3-[(2S)-4-(methylsulfanyl)-1-{(2R)-2-[2-(methylsulfanyl)phenyl]pyrrolidin-1-yl}-1-oxobutan-2-yl]urea	2