Annotations: 1BU9

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1bu9a_	Alpha and beta proteins (a+b)	beta-hairpin-alpha-hairpin repeat	Ankyrin repeat	Ankyrin repeat	p18ink4C(ink6)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Ankyrin repeat	8057704	3000154	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Ank_2	e1bu9A2	A: alpha superhelices	X: Repetitive alpha hairpins	H: Ankyrin repeat (From Topology)	T: Ankyrin repeat	F: Ank_2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.25.40.20	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat	Ankyrin repeat-containing domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF12796	Ankyrin repeats (3 copies) (Ank_2)	Ankyrin repeats (3 copies)	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROTEIN (CYCLIN-DEPENDENT KINASE 6 INHIBITOR)	protein binding binding kinase binding enzyme binding protein kinase binding enzyme regulator activity enzyme inhibitor activity protein kinase regulator activity protein kinase inhibitor activity molecular function inhibitor activity cyclin-dependent protein serine/threonine kinase inhibitor activity molecular function regulator activity cyclin-dependent protein serine/threonine kinase regulator activity protein serine/threonine kinase inhibitor activity protein binding binding kinase binding enzyme binding protein kinase binding enzyme regulator activity enzyme inhibitor activity protein kinase regulator activity protein kinase inhibitor activity molecular function inhibitor activity cyclin-dependent protein serine/threonine kinase inhibitor activity molecular function regulator activity cyclin-dependent protein serine/threonine kinase regulator activity protein serine/threonine kinase inhibitor activity kinase inhibitor activity kinase regulator activity	regulation of biological process regulation of cellular process phosphorylation cellular metabolic process negative regulation of metabolic process biological regulation negative regulation of biological process negative regulation of phosphate metabolic process regulation of cellular metabolic process negative regulation of cellular metabolic process regulation of phosphate metabolic process phosphate-containing compound metabolic process negative regulation of phosphorus metabolic process negative regulation of cellular process regulation of biological process regulation of cellular process phosphorylation cellular metabolic process negative regulation of metabolic process biological regulation negative regulation of biological process negative regulation of phosphate metabolic process regulation of cellular metabolic process negative regulation of cellular metabolic process regulation of phosphate metabolic process phosphate-containing compound metabolic process negative regulation of phosphorus metabolic process negative regulation of cellular process regulation of phosphorus metabolic process metabolic process cellular process regulation of phosphorylation negative regulation of phosphorylation phosphorus metabolic process regulation of metabolic process negative regulation of cell population proliferation regulation of stem cell proliferation cell population proliferation negative regulation of stem cell proliferation stem cell proliferation regulation of cell population proliferation developmental process multicellular organismal process cellular developmental process nervous system development multicellular organism development neurogenesis central nervous system development gliogenesis oligodendrocyte differentiation glial cell differentiation cell differentiation anatomical structure development system development regulation of growth regulation of cellular component organization growth negative regulation of cell growth regulation of cell growth cell growth cellular component organization negative regulation of growth cellular component organization or biogenesis regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation regulation of cyclin-dependent protein kinase activity regulation of transferase activity regulation of primary metabolic process regulation of cyclin-dependent protein serine/threonine kinase activity protein metabolic process cell cycle protein modification process regulation of cell cycle protein phosphorylation regulation of protein metabolic process primary metabolic process regulation of protein kinase activity regulation of macromolecule metabolic process regulation of molecular function regulation of kinase activity macromolecule modification regulation of protein serine/threonine kinase activity macromolecule metabolic process regulation of cell cycle phase transition regulation of cell cycle process cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle regulation of mitotic cell cycle phase transition regulation of mitotic cell cycle regulation of G1/S transition of mitotic cell cycle mitotic cell cycle process G1/S transition of mitotic cell cycle cell cycle process mitotic cell cycle phase transition	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002110	Ankyrin repeat	Repeat
A	IPR036770	Ankyrin repeat-containing domain superfamily	Homologous Superfamily
A	IPR050776	Ankyrin Repeat and Cyclin-Dependent Kinase Inhibitor	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P42773	multiple endocrine neoplasia type 1 pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia plasma cell myeloma astrocytic tumor breast carcinoma cerebrovascular disorder glioma malignant ependymoma medulloblastoma osteosarcoma pilocytic astrocytoma psoriasis atrial fibrillation breast fibroadenoma ductal breast carcinoma in situ multiple endocrine neoplasia type 1 pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia plasma cell myeloma astrocytic tumor breast carcinoma cerebrovascular disorder glioma malignant ependymoma medulloblastoma osteosarcoma pilocytic astrocytoma psoriasis atrial fibrillation breast fibroadenoma ductal breast carcinoma in situ hepatocellular carcinoma malignant glioma ovarian cancer pituitary cancer renal cell carcinoma breast cancer cancer glioblastoma invasive ductal breast carcinoma Malignant neoplasm of breast oligodendroglioma

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.