X-group (possible homology)

149 Cytochrome P450

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Ligands and drugs

6,107

Member domains

2,791

with ligand contacts (≤ 4 Å)

45.7% of members

2,529

with DrugDomain annotations

41.4% of members

2,492

with a DrugBank compound

40.8% 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.

201

Proteins with classified ligands

Superclasses bound (of 23)

10.0

Superclasses per 20 proteins

broader than 94% 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
Lipids and lipid-like molecules	86	22.1	3.90×	q < 0.0001
Benzenoids	52	14.5	3.59×	q < 0.0001
Organic nitrogen compounds	15	6.3	2.37×	q = 4.3e-3
Organoheterocyclic compounds	66	30.5	2.16×	q < 0.0001
Organic acids and derivatives	35	30.7	1.14×	q = 0.46
Homogeneous non-metal compounds	41	42.7	0.96×	q = 0.91
Organic oxygen compounds	34	39.5	0.86×	q = 0.45
Homogeneous metal compounds	43	97.3	0.44×	q < 0.0001
Nucleosides, nucleotides, and analogues	2	54.8	0.04×	q < 0.0001
Phenylpropanoids and polyketides	22	4.1	5.34×	not tested
Organohalogen compounds	3	0.6	5.31×	not tested
Hydrocarbons	5	1.4	3.61×	not tested
Alkaloids and derivatives	2	0.7	2.96×	not tested
Organosulfur compounds	3	4.1	0.74×	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
DB18267	HEM	Ferroheme	2,412
DB01744	CAM	Camphor	110
DB04664	CM5	Cyclohexyl-pentyl-maltoside	56
DB04070	DEB	6-Deoxyerythronolide B	44
DB03796	PLM	Palmitic Acid	31
DB00196	TPF	Fluconazole	27
DB00257	CL6	Clotrimazole	24
DB03317	HEC	Ferroheme C	20
DB00396	STR	Progesterone	18
DB01085	9PL	Pilocarpine	18
DB03254	PIM	4-Phenyl-1h-Imidazole	16
DB04257	PAM	Palmitoleic Acid	16
DB05812	AER	Abiraterone	16
DB02974	CPZ	4-(4-Chlorophenyl)Imidazole	15
DB09140	OXY	Oxygen	15
DB03852	CNL	Eucalyptol	14
DB02817	CAH	5-Exo-Hydroxycamphor	13
DB11837	YSY	Osilodrostat	13
DB00582	VOR	Voriconazole	12
DB00624	TES	Testosterone	12

Most frequently bound compounds

PDB ligand	Name	Domains in contact
HEM	PROTOPORPHYRIN IX CONTAINING FE	2,700
CL	CHLORIDE ION	198
Kmetal	POTASSIUM ION	124
CAM	CAMPHOR	110
NAmetal	SODIUM ION	66
CM5	5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE	56
ZNmetal	ZINC ION	52
HOA	HYDROXYAMINE	46
DEB	6-DEOXYERYTHRONOLIDE B	44
PLM	PALMITIC ACID	36
CAmetal	CALCIUM ION	33
MGmetal	MAGNESIUM ION	32
SYN	ethenylbenzene	32
TPF	2-(2,4-DIFLUOROPHENYL)-1,3-DI(1H-1,2,4-TRIAZOL-1-YL)PROPAN-2-OL	27
D0L	(2S)-2-[[(2S)-1-heptylpyrrolidin-2-yl]carbonylamino]-3-phenyl-propanoic acid	26
IC6	(2S)-2-(6-imidazol-1-ylhexanoylamino)-3-phenyl-propanoic acid	26
CL6	1-[(2-CHLOROPHENYL)(DIPHENYL)METHYL]-1H-IMIDAZOLE	24
ANN	4-METHOXYBENZOIC ACID	21
OXY	OXYGEN MOLECULE	21
QR8	(3~{R},4~{S},5~{R},6~{S},7~{S},9~{S},11~{R},12~{S},13~{R},14~{R})-3,5,7,9,11,13,14-heptamethyl-4,6,12-tris(oxidanyl)-1-oxacyclotetradecane-2,10-dione	21