ECOD
X-group (possible homology)

7555 Alpha-2,3/8-sialyltransferase CstII-related

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Ligands and drugs

257
Member domains
45
with ligand contacts (≤ 4 Å)
17.5% of members
45
with DrugDomain annotations
17.5% of members
38
with a DrugBank compound
14.8% 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.

8
Proteins with classified ligands
4
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.

SuperclassProteinsExpected
0.25×observed / expected4×
RatioSignificance
Nucleosides, nucleotides, and analogues62.22.75×not tested
Organic oxygen compounds31.61.91×not tested
Homogeneous non-metal compounds31.71.77×not tested
Benzenoids10.61.73×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

DrugBankPDB ligandNameDomains
DB00141NAGN-Acetylglucosamine20
DB03403C5PCytidine-5'-Monophosphate11
DB02431CTPCytidine-5'-Triphosphate2
DB02485NCCCytidine-5'-Monophosphate-5-N-Acetylneuraminic Acid2
DB04555CDPCytidine-5'-Diphosphate2
DB02097CTNCytidine1
DB04339——1

Most frequently bound compounds

PDB ligandNameDomains in contact
NAG2-acetamido-2-deoxy-beta-D-glucopyranose16
C5PCYTIDINE-5'-MONOPHOSPHATE10
CSFCYTIDINE-5'-MONOPHOSPHATE-3-FLUORO-N-ACETYL-NEURAMINIC ACID9
CHN3-PROTONATED CYTIDINE-5'-MONOPHOSPHATE4
55T5'-O-[(R)-[(S)-[3-(acetylamino)phenyl](phosphono)methoxy](hydroxy)phosphoryl]cytidine2
CDPCYTIDINE-5'-DIPHOSPHATE2
CLCHLORIDE ION2
CTPCYTIDINE-5'-TRIPHOSPHATE2
NCCCYTIDINE-5'-MONOPHOSPHATE-5-N-ACETYLNEURAMINIC ACID2
CG3HYDROXY(2-HYDROXYPHENYL)OXOAMMONIUM1
CTN4-AMINO-1-BETA-D-RIBOFURANOSYL-2(1H)-PYRIMIDINONE1
OPOO-NITROPHENOL1