X-group (possible homology)

5067 Multidrug efflux transporter AcrB transmembrane domain

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Ligands and drugs

2,297

Member domains

520

with ligand contacts (≤ 4 Å)

22.6% of members

401

with DrugDomain annotations

17.5% of members

110

with a DrugBank compound

4.8% 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.

Proteins with classified ligands

Superclasses bound (of 23)

—

Superclasses per 20 proteins

fewer than 20 proteins: too few to compare at equal depth

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
Homogeneous metal compounds	2	7.7	0.26×	q = 9.2e-3
Hydrocarbons	1	0.1	9.07×	not tested
Lipids and lipid-like molecules	15	1.8	8.54×	not tested
Phenylpropanoids and polyketides	2	0.3	6.09×	not tested
Organic oxygen compounds	4	3.1	1.27×	not tested
Organoheterocyclic compounds	3	2.4	1.24×	not tested
Organic acids and derivatives	1	2.4	0.41×	not tested
Homogeneous non-metal compounds	1	3.4	0.29×	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
DB02703	FUA	Fusidic acid	14
DB03279	LMU	Dodecyl-Alpha-D-Maltoside	8
DB04540	CLR	Cholesterol	8
DB00163	VIV	Vitamin E	4
DB04332	ETE	2-{2-[2-2-(Methoxy-Ethoxy)-Ethoxy]-Ethoxy}-Ethanol	4
DB02686	UMQ	Undecyl-Beta-D-Maltopyranoside	3
DB00144	P5S	Phosphatidyl serine	2
DB00199	ERY	Erythromycin	2
DB00973	H56	Ezetimibe	2
DB02343	P3G	3,6,9,12,15-Pentaoxaheptadecane	2
DB06155	AY6	Rimonabant	2
DB00415	AIC	Ampicillin	1
DB00537	CPF	Ciprofloxacin	1
DB00601	ZLD	Linezolid	1
DB00997	DM2	Doxorubicin	1
DB02810	MHA	N-(2-Acetamido)Iminodiacetic Acid	1
DB03825	RHQ	Rhodamine 6G	1
DB04705	HC3	25-Hydroxycholesterol	1
DB17031	ET	Homidium	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
PTY	PHOSPHATIDYLETHANOLAMINE	151
D12	DODECANE	79
D10	DECANE	68
HEX	HEXANE	46
OCT	N-OCTANE	43
C14	TETRADECANE	36
CLR	CHOLESTEROL	26
DDR	(2S)-3-hydroxypropane-1,2-diyl didecanoate	24
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	20
NImetal	NICKEL (II) ION	20
LPX	(2S)-3-{[(R)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-hydroxypropyl hexadecanoate	18
FUA	FUSIDIC ACID	13
L6T	alpha-D-glucopyranosyl 6-O-dodecyl-alpha-D-glucopyranoside	11
Y01	CHOLESTEROL HEMISUCCINATE	10
R16	HEXADECANE	9
LMU	DODECYL-ALPHA-D-MALTOSIDE	8
XE9	[3-(3-chloranyl-2-piperazin-1-yl-quinolin-6-yl)phenyl]methanamine	8
DD9	nonane	7
8K6	Octadecane	6
OLC	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	6