X-group (possible homology)

3914 TMEM16 lipid scramblase transmembrane domain

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Ligands and drugs

426

Member domains

120

with ligand contacts (≤ 4 Å)

28.2% of members

with DrugDomain annotations

19.5% of members

with a DrugBank compound

2.8% 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
Hydrocarbons	1	0.0	29×	not tested
Lipids and lipid-like molecules	3	0.6	5.46×	not tested
Benzenoids	1	0.4	2.77×	not tested
Organoheterocyclic compounds	2	0.8	2.64×	not tested
Homogeneous metal compounds	5	2.4	2.07×	not tested
Organic oxygen compounds	1	1.0	1.02×	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
DB00141	NAG	N-Acetylglucosamine	10
DB02686	UMQ	Undecyl-Beta-D-Maltopyranoside	2
DB06803	VUT	Niclosamide	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CAmetal	CALCIUM ION	108
PGW	(1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl(9Z)-octadec-9-enoate	33
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	9
P1O	1,2-DIDECANOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	8
JRF	1-Hydroxy-3-(trifluoromethyl)pyrido[1,2-a]benzimidazole-4-carbonitrile	3
79M	(2R)-2,3-dihydroxypropyl (7Z)-hexadec-7-enoate	2
8K6	Octadecane	2
C14	TETRADECANE	2
D10	DECANE	2
D12	DODECANE	2
HEX	HEXANE	2
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	2
UMQ	UNDECYL-MALTOSIDE	2
VUT	5-chloro-N-(2-chloro-4-nitrophenyl)-2-hydroxybenzamide	1