X-group (possible homology)

5051 Sodium:neurotransmitter symporter family (SNF)-like

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Ligands and drugs

3,930

Member domains

520

with ligand contacts (≤ 4 Å)

13.2% of members

319

with DrugDomain annotations

8.1% of members

227

with a DrugBank compound

5.8% 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)

11.5

Superclasses per 20 proteins

broader than 99% 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	17	6.9	2.48×	q = 5.5e-4
Homogeneous non-metal compounds	17	9.6	1.78×	q = 0.02
Organoheterocyclic compounds	12	6.8	1.76×	q = 0.06
Organic oxygen compounds	14	8.8	1.58×	q = 0.09
Homogeneous metal compounds	10	21.8	0.46×	q = 1.2e-3
Nucleosides, nucleotides, and analogues	1	12.3	0.08×	q < 0.0001
Miscellaneous inorganic compounds	1	0.0	30×	not tested
Alkaloids and derivatives	3	0.2	20×	not tested
Hydrocarbons	5	0.3	16×	not tested
Organometallic compounds	1	0.1	16×	not tested
Lipids and lipid-like molecules	30	4.9	6.07×	not tested
Organic nitrogen compounds	5	1.4	3.53×	not tested
Benzenoids	9	3.2	2.77×	not tested
Phenylpropanoids and polyketides	1	0.9	1.08×	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
DB00149	LEU	Leucine	45
DB00141	NAG	N-Acetylglucosamine	44
DB04540	CLR	Cholesterol	42
DB00160	ALA	Alanine	10
DB00125	ARG	Arginine	9
DB11142	MSE	Selenomethionine	8
DB00150	TRP	Tryptophan	7
DB00476	29E	Duloxetine	7
DB00715	8PR	Paroxetine	7
DB01104	SRE	Sertraline	7
DB02451	BNG	B-nonylglucoside	7
DB08357	P4G	Diethylene glycol diethyl ether	7
DB08558	SOG	2-HYDROXYMETHYL-6-OCTYLSULFANYL-TETRAHYDRO-PYRAN-3,4,5-TRIOL	7
DB00907	COC	Cocaine	6
DB01175	68P	Escitalopram	5
DB01242	CXX	Clomipramine	5
DB01577	—	Metamfetamine	5
DB04455	BET	N,N,N-trimethylglycinium	5
DB04664	CM5	Cyclohexyl-pentyl-maltoside	5
DB00120	PHE	Phenylalanine	4

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAmetal	SODIUM ION	235
CL	CHLORIDE ION	168
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	99
CLR	CHOLESTEROL	78
LEU	LEUCINE	46
Y01	CHOLESTEROL HEMISUCCINATE	45
3PH	1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE	21
Kmetal	POTASSIUM ION	21
D10	DECANE	20
D12	DODECANE	16
PGT	(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE	16
OLC	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	14
MNmetal	MANGANESE (II) ION	11
OCT	N-OCTANE	11
ALA	ALANINE	10
ARG	ARGININE	10
XZF	Polythiazide	10
BET	TRIMETHYL GLYCINE	9
CHT	CHOLINE ION	9
TAU	2-AMINOETHANESULFONIC ACID	9