X-group (possible homology)

5053 Clc chloride channel

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Ligands and drugs

583

Member domains

161

with ligand contacts (≤ 4 Å)

27.6% of members

106

with DrugDomain annotations

18.2% of members

with a DrugBank compound

3.3% 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	3	6.8	0.44×	q = 0.09
Organometallic compounds	1	0.0	51×	not tested
Hydrocarbons	1	0.1	10×	not tested
Homogeneous non-metal compounds	12	3.0	4.04×	not tested
Lipids and lipid-like molecules	6	1.5	3.90×	not tested
Nucleosides, nucleotides, and analogues	3	3.8	0.79×	not tested
Organoheterocyclic compounds	1	2.1	0.47×	not tested
Organic acids and derivatives	1	2.1	0.47×	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
DB00171	ATP	ATP	12
DB02198	BXA	2-Bromoacetyl Group	2
DB01046	—	—	1
DB05514	—	—	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	93
BR	BROMIDE ION	38
ATP	ADENOSINE-5'-TRIPHOSPHATE	14
MGmetal	MAGNESIUM ION	14
F	FLUORIDE ION	11
CLR	CHOLESTEROL	10
A1A8I	(2R)-1-{[(S)-hydroxy{[(1S,2R,3R,4S,5S,6R)-2,4,6-trihydroxy-3,5-bis(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}-3-(octadecanoyloxy)propan-2-yl (5E,8E,11E,13E)-icosa-5,8,11,13-tetraenoate	8
DMU	DECYL-BETA-D-MALTOPYRANOSIDE	8
Y01	CHOLESTEROL HEMISUCCINATE	8
0J1	(2R)-3-{[(R)-hydroxy{[(1S,2R,3S,4S,5R,6R)-2,3,4,6-tetrahydroxy-5-(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propane-1,2-diyl dinonanoate	4
GH6	2-[[2,6-bis(chloranyl)-3-phenylmethoxy-phenyl]amino]pyridine-3-carboxylic acid	4
MYS	PENTADECANE	4
PIO	[(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate	4
SCN	THIOCYANATE ION	4
SEK	SELENOCYANATE ION	4
A1IIT	[(2R)-2-octanoyloxy-3-[oxidanyl-[(1S,2R,3S,4R,5R,6R)-2,4,5-tris(oxidanyl)-3,6-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate	2
BXA	bromoacetic acid	2