X-group (possible homology)

179 CO dehydrogenase ISP C-domain like

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Ligands and drugs

247

Member domains

171

with ligand contacts (≤ 4 Å)

69.2% of members

140

with DrugDomain annotations

56.7% of members

with a DrugBank compound

18.2% 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)

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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	1	7.7	0.13×	q = 1.5e-3
Organoheterocyclic compounds	6	2.4	2.47×	not tested
Nucleosides, nucleotides, and analogues	9	4.4	2.06×	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
DB03300	MCN	Pterin Cytosine Dinucleotide	23
DB02137	PCD	Molybdenum cofactor	18
DB03147	FAD	Flavin adenine dinucleotide	10

Most frequently bound compounds

PDB ligand	Name	Domains in contact
FES	FE2/S2 (INORGANIC) CLUSTER	171
MTE	PHOSPHONIC ACIDMONO-(2-AMINO-5,6-DIMERCAPTO-4-OXO-3,7,8A,9,10,10A-HEXAHYDRO-4H-8-OXA-1,3,9,10-TETRAAZA-ANTHRACEN-7-YLMETHYL)ESTER	82
MCN	PTERIN CYTOSINE DINUCLEOTIDE	23
PCD	(MOLYBDOPTERIN-CYTOSINE DINUCLEOTIDE-S,S)-DIOXO-AQUA-MOLYBDENUM(V)	18
XAX	{[(5aR,8R,9aR)-2-amino-4-oxo-6,7-di(sulfanyl-kappaS)-3,5,5a,8,9a,10-hexahydro-4H-pyrano[3,2-g]pteridin-8-yl]methyl dihydrogenato(2-) phosphate}(hydroxy)oxo(thioxo)molybdenum	12
CL	CHLORIDE ION	3
DW6	CuSMo(=O)OH pterin	2
IOD	IODIDE ION	1