X-group (possible homology)

4187 NosL/MerB-like

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Ligands and drugs

193

Member domains

106

with ligand contacts (≤ 4 Å)

54.9% of members

with DrugDomain annotations

34.7% of members

with a DrugBank compound

20.2% 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
Organic salts	1	0.0	244×	not tested
Organometallic compounds	1	0.0	178×	not tested
Organic nitrogen compounds	1	0.1	7.95×	not tested
Homogeneous non-metal compounds	2	0.9	2.36×	not tested
Homogeneous metal compounds	3	1.9	1.55×	not tested
Organic oxygen compounds	1	0.8	1.27×	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	—	N-Acetylglucosamine	3
DB02184	DTV	D-1,4-dithiothreitol	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
HGmetal	MERCURY (II) ION	26
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	18
M6P	6-O-phosphono-alpha-D-mannopyranose	16
NDG	2-acetamido-2-deoxy-alpha-D-glucopyranose	16
CL	CHLORIDE ION	13
ZNmetal	ZINC ION	7
BR	BROMIDE ION	5
ZN5	Dimethyltin dibromide	5
CUmetal	COPPER (II) ION	4
ZN0	Triethyltin chloride	4
ZN6	Diethyltin dichloride	4
ZN7	DIETHYLLEAD DIBROMIDE	4
ZN8	Trimethyltin chloride	4
ZN9	Trimethyllead bromide	4
CCN	ACETONITRILE	2
CU1metal	COPPER (I) ION	2
DTV	(2S,3S)-1,4-DIMERCAPTOBUTANE-2,3-DIOL	2