X-group (possible homology)

7518 PK C-terminal domain-like

Open in classification tree →

Ligands and drugs

1,375

Member domains

976

with ligand contacts (≤ 4 Å)

71.0% of members

813

with DrugDomain annotations

59.1% of members

741

with a DrugBank compound

53.9% 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)

8.0

Superclasses per 20 proteins

broader than 57% 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
Nucleosides, nucleotides, and analogues	3	5.5	0.55×	q = 0.39
Homogeneous metal compounds	5	9.7	0.52×	q = 0.07
Organic oxygen compounds	14	3.9	3.56×	not tested
Benzenoids	4	1.4	2.77×	not tested
Organosulfur compounds	1	0.4	2.46×	not tested
Organic acids and derivatives	3	3.1	0.98×	not tested
Homogeneous non-metal compounds	2	4.2	0.47×	not tested
Organoheterocyclic compounds	1	3.0	0.33×	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
DB04551	FBP	beta-D-fructofuranose 1,6-bisphosphate	469
DB00160	ALA	Alanine	27
DB00133	SER	Serine	26
DB02007	G6P	alpha-D-glucose 6-phosphate	24
DB00131	AMP	Adenosine phosphate	16
DB00172	PRO	Proline	12
DB00120	PHE	Phenylalanine	8
DB00139	SIN	Succinic acid	8
DB00151	CYS	Cysteine	6
DB00150	TRP	Tryptophan	4
DB00156	THR	Threonine	4
DB02053	R5P	Ribose-5-phosphate	4
DB03247	FMN	Flavin mononucleotide	4
DB07692	DYY	1-[(2,6-difluorophenyl)sulfonyl]-4-(2,3-dihydro-1,4-benzodioxin-6-ylsulfonyl)piperazine	4
DB07697	DZG	1-(2,3-dihydro-1,4-benzodioxin-6-ylsulfonyl)-4-[(4-methoxyphenyl)sulfonyl]piperazine	4
DB08132	LZ2	5-hydroxynaphthalene-1-sulfonamide	4
DB00128	ASP	Aspartic acid	3
DB00161	VAL	Valine	3
DB07628	D8G	6-(2-fluorobenzyl)-2,4-dimethyl-4,6-dihydro-5H-thieno[2',3':4,5]pyrrolo[2,3-d]pyridazin-5-one	3
DB00174	ASN	Asparagine	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
FBP	1,6-di-O-phosphono-beta-D-fructofuranose	595
FDP	2,6-di-O-phosphono-beta-D-fructofuranose	54
Kmetal	POTASSIUM ION	33
NAmetal	SODIUM ION	30
ALA	ALANINE	27
SER	SERINE	26
G6P	6-O-phosphono-alpha-D-glucopyranose	24
UNX	UNKNOWN ATOM OR ION	17
AMP	ADENOSINE MONOPHOSPHATE	16
PRO	PROLINE	12
PHE	PHENYLALANINE	11
PYR	PYRUVIC ACID	10
A1B77	7-[(dimethylamino)methyl]-8-fluoro-5-methyl-3-[(6-methylpyridin-2-yl)methyl]-3,5-dihydro-4H-pyridazino[4,5-b]indol-4-one	8
A1JB0	4-[4-[[7-(azetidin-1-yl)-2,1,3-benzoxadiazol-4-yl]sulfonyl]piperazin-1-yl]sulfonylbenzene-1,2-diol	8
A1JB3	4-[4-[(7-azanyl-2,1,3-benzoxadiazol-4-yl)sulfonyl]piperazin-1-yl]sulfonylbenzene-1,2-diol	8
A1JBW	4-[4-[[7-(dimethylamino)-2,1,3-benzoxadiazol-4-yl]sulfonyl]piperazin-1-yl]sulfonylbenzene-1,2-diol	8
A1JBZ	4-[4-[(7-piperidin-1-yl-2,1,3-benzoxadiazol-4-yl)sulfonyl]piperazin-1-yl]sulfonylbenzene-1,2-diol	8
HVI	6-[(6-aminopyridin-2-yl)methyl]-4-methyl-2-[(1H-pyrazol-3-yl)methyl]-4,6-dihydro-5H-[1,3]thiazolo[5',4':4,5]pyrrolo[2,3-d]pyridazin-5-one	8
I0R	6-[(4-hydroxyphenyl)methyl]-2,4-dimethyl-4,6-dihydro-5H-[1,3]thiazolo[5',4':4,5]pyrrolo[2,3-d]pyridazin-5-one	8
O7F	4-[4-(3-aminobenzene-1-sulfonyl)piperazine-1-sulfonyl]benzene-1,2-diol	8