X-group (possible homology)

199 Guanido kinase-N

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Ligands and drugs

408

Member domains

143

with ligand contacts (≤ 4 Å)

35.0% of members

with DrugDomain annotations

22.3% of members

with a DrugBank compound

18.6% 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
Homogeneous metal compounds	3	6.3	0.48×	q = 0.14
Organic acids and derivatives	12	2.0	6.05×	not tested
Organosulfur compounds	1	0.3	3.79×	not tested
Organoheterocyclic compounds	1	2.0	0.51×	not tested
Homogeneous non-metal compounds	1	2.8	0.36×	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
DB02751	NMG	Glycocyamine	36
DB00125	ARG	Arginine	17
DB00148	—	Creatine	4
DB02490	IOM	(Diaminomethyl-Methyl-Amino)-Acetic Acid	4
DB04027	DAR	D-arginine	4
DB13191	—	—	4
DB03345	BME	Mercaptoethanol	3
DB00129	ORN	Ornithine	1
DB00155	CIR	Citrulline	1
DB03305	ILO	N(G)-Iminoethylornithine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NMG	GUANIDINO ACETATE	36
CRN	N-[(E)-AMINO(IMINO)METHYL]-N-METHYLGLYCINE	33
A1CZQ	[4-(2-amino-6-methylpyrimidin-4-yl)piperazin-1-yl](3,5,7-trimethyl-1H-indol-2-yl)methanone	16
ARG	ARGININE	15
KLU	(2S)-4-(chloroacetyl)-3,4-dihydro-2H-1,4-benzoxazine-2-carboxamide	10
UNX	UNKNOWN ATOM OR ION	7
3S5	Taurocyamine	4
BME	BETA-MERCAPTOETHANOL	3
DAR	D-ARGININE	3
IOM	(DIAMINOMETHYL-METHYL-AMINO)-ACETIC ACID	3
MGmetal	MAGNESIUM ION	2
RPI	phospho-arginine	2
CAmetal	CALCIUM ION	1
CIR	CITRULLINE	1
CL	CHLORIDE ION	1
ILO	N5-IMINOETHYL-L-ORNITHINE	1
Kmetal	POTASSIUM ION	1
NAmetal	SODIUM ION	1
ORN	L-ornithine	1