X-group (possible homology)

275 MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase

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Ligands and drugs

4,152

Member domains

715

with ligand contacts (≤ 4 Å)

17.2% of members

408

with DrugDomain annotations

9.8% of members

with a DrugBank compound

0.8% 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)

2.5

Superclasses per 20 proteins

narrower than 98% 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
Homogeneous metal compounds	25	13.1	1.91×	q < 0.0001
Nucleosides, nucleotides, and analogues	1	7.4	0.14×	q = 8.0e-3
Homogeneous non-metal compounds	0	5.7	0	q = 7.0e-3
Organic oxygen compounds	0	5.3	0	q = 0.01
Lipids and lipid-like molecules	1	3.0	0.34×	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
DB04022	G4P	Guanosine tetraphosphate	5
DB06697	D8Z	Artemether	1
DB09274	D95	Artesunate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ZNmetal	ZINC ION	647
MGmetal	MAGNESIUM ION	8
2TM	5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine	5
G4P	GUANOSINE-5',3'-TETRAPHOSPHATE	5
C0L	methyl[(1E,5R)-5-{(3E)-3-[(2E,4E,8R,9E,12E)-1,8-dihydroxy-2,5,9-trimethyltetradeca-2,4,9,12-tetraen-1-ylidene]-2,4-dioxo-3,4-dihydro-2H-pyran-6-yl}hex-1-en-1-yl]carbamate	3
CTP	CYTIDINE-5'-TRIPHOSPHATE	3
ATP	ADENOSINE-5'-TRIPHOSPHATE	2
PBmetal	LEAD (II) ION	2
SMmetal	SAMARIUM (III) ION	2
A1L89	P1-(5'-Adenosyl) P4-(5'-uridyl) tetraphosphate	1
ACE	ACETYL GROUP	1
ADP	ADENOSINE-5'-DIPHOSPHATE	1
D8Z	Artemether	1
D95	Artesunate	1
UTP	URIDINE 5'-TRIPHOSPHATE	1