X-group (possible homology)

7560 Ribose/Galactose isomerase RpiB/AlsB

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Ligands and drugs

275

Member domains

with ligand contacts (≤ 4 Å)

34.9% of members

with DrugDomain annotations

29.1% of members

with a DrugBank compound

23.6% 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 oxygen compounds	8	1.8	4.53×	not tested
Organic acids and derivatives	1	1.4	0.73×	not tested
Homogeneous non-metal compounds	1	1.9	0.52×	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
DB02053	R52	Ribose-5-phosphate	11
DB04496	RES	4-Phospho-D-erythronohydroxamic acid	7
DB03108	DEZ	4-phospho-D-erythronic acid	5
DB04277	TG6	Fructose -6-Phosphate	4
DB15087	PSJ	Psicose	4
DB09459	TLA	L-tartaric acid	2
DB15073	RB5	Ribose	2
DB02175	MLA	Malonic acid	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
RES	4-PHOSPHO-D-ERYTHRONOHYDROXAMIC ACID	7
5RP	RIBULOSE-5-PHOSPHATE	6
R5P	RIBOSE-5-PHOSPHATE	6
A6P	6-O-phosphono-alpha-D-allopyranose	5
DEZ	4-PHOSPHO-D-ERYTHRONATE	5
R10	5-O-phosphono-D-ribonic acid	5
PSJ	D-psicose	4
RBL	D-ribulose	4
TG6	6-O-phosphono-D-tagatose	4
AOS	D-ALLOSE	2
CL	CHLORIDE ION	2
IOD	IODIDE ION	2
RB5	D-ribose	2
TLA	L(+)-TARTARIC ACID	2
MLA	MALONIC ACID	1