X-group (possible homology)

228 Fe,Mn superoxide dismutase (SOD)-C

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Ligands and drugs

983

Member domains

615

with ligand contacts (≤ 4 Å)

62.6% of members

563

with DrugDomain annotations

57.3% of members

with a DrugBank compound

7.4% 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)

2.9

Superclasses per 20 proteins

narrower than 96% 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	65	31.9	2.04×	q < 0.0001
Homogeneous non-metal compounds	10	14.0	0.71×	q = 0.36
Nucleosides, nucleotides, and analogues	1	18.0	0.06×	q < 0.0001
Lipids and lipid-like molecules	0	7.3	0	q = 2.6e-3
Organic acids and derivatives	0	10.1	0	q = 1.3e-4
Organic oxygen compounds	0	13.0	0	q < 0.0001
Organoheterocyclic compounds	0	10.0	0	q = 1.3e-4
Mixed metal/non-metal compounds	1	1.4	0.73×	not tested
Benzenoids	1	4.8	0.21×	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
DB14522	OH	Hydroxide ion	6
DB03297	PMS	Benzylsulfonic acid	3
DB11091	PEO	Hydrogen peroxide	3
DB03247	FMN	Flavin mononucleotide	1
DB04436	—	3-Fluoro-L-tyrosine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MNmetal	MANGANESE (II) ION	330
FEmetal	FE (III) ION	187
FE2metal	FE (II) ION	46
AZI	AZIDE ION	19
MN3metal	MANGANESE (III) ION	15
PEO	HYDROGEN PEROXIDE	10
NAmetal	SODIUM ION	8
OH	HYDROXIDE ION	6
ZNmetal	ZINC ION	5
MH2	MANGANESE ION, 1 HYDROXYL COORDINATED	4
O	OXYGEN ATOM	4
BR	BROMIDE ION	2
CAmetal	CALCIUM ION	2
F	FLUORIDE ION	2
Kmetal	POTASSIUM ION	2
P6G	HEXAETHYLENE GLYCOL	2
PMS	phenylmethanesulfonic acid	2
UNX	UNKNOWN ATOM OR ION	2
CL	CHLORIDE ION	1
COmetal	COBALT (II) ION	1