X-group (possible homology)

209 C-type lectin-like

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Ligands and drugs

3,661

Member domains

1,153

with ligand contacts (≤ 4 Å)

31.5% of members

1,048

with DrugDomain annotations

28.6% of members

518

with a DrugBank compound

14.1% 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)

6.3

Superclasses per 20 proteins

narrower than 73% 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
Organic oxygen compounds	39	18.3	2.14×	q < 0.0001
Homogeneous metal compounds	77	45.0	1.71×	q < 0.0001
Homogeneous non-metal compounds	31	19.7	1.57×	q = 0.01
Benzenoids	4	6.7	0.60×	q = 0.50
Organic acids and derivatives	6	14.2	0.42×	q = 0.03
Organoheterocyclic compounds	4	14.1	0.28×	q = 4.5e-3
Lipids and lipid-like molecules	2	10.2	0.20×	q = 5.6e-3
Nucleosides, nucleotides, and analogues	0	25.4	0	q < 0.0001
Organic 1,3-dipolar compounds	1	0.1	13×	not tested
Organic nitrogen compounds	4	2.9	1.37×	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
DB00141	NAG	N-Acetylglucosamine	56
DB01979	MMA	Methyl alpha-D-mannoside	23
DB04473	FUC	alpha-L-fucose	12
DB08818	—	—	10
DB02379	BGC	Beta-D-Glucose	8
DB03058	SOA	2-Aminobenzyl alcohol	8
DB03721	—	N-acetyl-alpha-neuraminic acid	7
DB00150	TRP	Tryptophan	6
DB03194	MFB	Methyl beta-L-fucopyranoside	6
DB03879	MFU	alpha-L-methyl-fucose	6
DB09140	OXY	Oxygen	5
DB13178	INS	Inositol	5
DB03567	A2G	alpha-N-Acetyl-D-galactosamine	4
DB03959	SGN	N,O6-Disulfo-Glucosamine	4
DB04526	GMH	L-Glycero-D-Manno-Heptopyranose	4
DB02210	HEZ	Hexane-1,6-Diol	3
DB03740	NDG	N-acetyl-alpha-D-glucosamine	3
DB04046	MBG	Methyl beta-galactoside	3
DB02219	CXS	3-(cyclohexylamino)propanesulfonic acid	2
DB02255	—	Ilomastat	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CAmetal	CALCIUM ION	675
CL	CHLORIDE ION	223
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	94
NAmetal	SODIUM ION	72
MAN	alpha-D-mannopyranose	44
MGmetal	MAGNESIUM ION	39
ZNmetal	ZINC ION	26
MMA	methyl alpha-D-mannopyranoside	24
AVJ	N,N,N-trimethyl-histidine	16
NGA	2-acetamido-2-deoxy-beta-D-galactopyranose	16
2F8	methyl 2-acetamido-2-deoxy-alpha-D-glucopyranoside	14
GAL	beta-D-galactopyranose	12
NJT	9-chloranyl-5-propyl-11~{H}-pyrido[2,3-b][1,4]benzodiazepin-6-one	12
CU1metal	COPPER (I) ION	9
FUC	alpha-L-fucopyranose	9
SOA	ISATOIC ANHYDRIDE	8
GMH	L-glycero-alpha-D-manno-heptopyranose	7
MRD	(4R)-2-METHYLPENTANE-2,4-DIOL	7
BGC	beta-D-glucopyranose	6
EZ8	[1-[(2~{S},3~{S},4~{R},5~{S},6~{R})-2-[(1~{S},2~{S},4~{S},5~{S})-2-(2-chloroethyloxy)-4,5-bis[[4-(hydroxymethyl)phenyl]methylcarbamoyl]cyclohexyl]oxy-6-(hydroxymethyl)-4,5-bis(oxidanyl)oxan-3-yl]-1,2,3-triazol-4-yl]methylazanium	6