Annotations: 4BSZ

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2 Family	Ankyrin repeat	8088392	4000366	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Ankyrin repeat	8088393	3000154	SCOP2 (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	Ribosomal_S3_C	e4bszA1	A: a+b two layers	X: T-fold	H: Ribosomal protein S3-C (From Topology)	T: Ribosomal protein S3-C	F: Ribosomal_S3_C	ECOD (1.6)
A	KH_2_3	e4bszA3	A: a+b two layers	X: Alpha-lytic protease prodomain-like	H: KH-domains	T: Prokaryotic type KH domain (KH-domain type II)	F: KH_2_3	ECOD (1.6)
B	Ank_2	e4bszB1	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	3.30.300.20	Alpha Beta	2-Layer Sandwich	GMP Synthetase	Chain A, domain 3	CATH (4.3.0)
B	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	PF07650	KH domain (KH_2)	KH domain	-	Domain
A	PF00189	Ribosomal protein S3, C-terminal domain (Ribosomal_S3_C)	Ribosomal protein S3, C-terminal domain	This family contains a central domain Pfam:PF00013, hence the amino and carboxyl terminal domains are stored separately. This is a minimal carboxyl-terminal domain. Some are much longer.	Domain
B	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	40S RIBOSOMAL PROTEIN S3	DNA-(apurinic or apyrimidinic site) endonuclease activity catalytic activity, acting on DNA catalytic activity, acting on a nucleic acid catalytic activity RNA binding binding organic cyclic compound binding nucleic acid binding structural molecule activity structural constituent of ribosome	organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process primary metabolic process translation gene expression macromolecule biosynthetic process organic substance metabolic process biosynthetic process organic substance biosynthetic process cytoplasmic translation nitrogen compound metabolic process metabolic process organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process primary metabolic process translation gene expression macromolecule biosynthetic process organic substance metabolic process biosynthetic process organic substance biosynthetic process cytoplasmic translation nitrogen compound metabolic process metabolic process cellular process protein metabolic process macromolecule metabolic process establishment of organelle localization cellular localization ribonucleoprotein complex biogenesis nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus intracellular transport establishment of localization protein-containing complex localization cellular component biogenesis localization ribosome biogenesis ribosomal small subunit export from nucleus organelle localization establishment of localization in cell cellular component organization or biogenesis nuclear export ribosome localization	preribosome protein-containing complex ribonucleoprotein complex preribosome, small subunit precursor intracellular anatomical structure cytoplasm cellular anatomical entity cytosol 90S preribosome cytosolic small ribosomal subunit small ribosomal subunit intracellular organelle ribosomal subunit cytosolic ribosome preribosome protein-containing complex ribonucleoprotein complex preribosome, small subunit precursor intracellular anatomical structure cytoplasm cellular anatomical entity cytosol 90S preribosome cytosolic small ribosomal subunit small ribosomal subunit intracellular organelle ribosomal subunit cytosolic ribosome organelle intracellular non-membrane-bounded organelle ribosome non-membrane-bounded organelle membrane-bounded organelle nucleus intracellular membrane-bounded organelle
B	ANKYRIN REPEAT-CONTAINING PROTEIN YAR1	unfolded protein binding protein binding binding	establishment of organelle localization cellular localization ribonucleoprotein complex biogenesis nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus intracellular transport establishment of localization protein-containing complex localization cellular component biogenesis localization ribosome biogenesis ribosomal small subunit export from nucleus organelle localization establishment of organelle localization cellular localization ribonucleoprotein complex biogenesis nucleocytoplasmic transport transport nuclear transport ribosomal subunit export from nucleus intracellular transport establishment of localization protein-containing complex localization cellular component biogenesis localization ribosome biogenesis ribosomal small subunit export from nucleus organelle localization establishment of localization in cell cellular process cellular component organization or biogenesis nuclear export ribosome localization protein localization regulation of localization regulation of biological process regulation of cellular process regulation of protein localization biological regulation regulation of cellular localization cellular macromolecule localization macromolecule localization response to osmotic stress response to stimulus response to stress response to abiotic stimulus cellular response to stimulus response to oxidative stress cellular response to chemical stimulus cellular response to stress response to chemical cellular response to oxidative stress cellular response to chemical stress ribosomal small subunit biogenesis	RNA polymerase II transcription regulator complex membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle MBF transcription complex organelle cytoplasm SBF transcription complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001351	Small ribosomal subunit protein uS3, C-terminal	Domain
A	IPR009019	K homology domain superfamily, prokaryotic type	Homologous Superfamily
A	IPR004044	K Homology domain, type 2	Domain
A	IPR015946	K homology domain-like, alpha/beta	Homologous Superfamily
A	IPR036419	Ribosomal protein S3, C-terminal domain superfamily	Homologous Superfamily
A	IPR005703	Small ribosomal subunit protein uS3, eukaryotic/archaeal	Family
A	IPR018280	Small ribosomal subunit protein uS3, conserved site	Conserved Site
B	IPR002110	Ankyrin repeat	Repeat
B	IPR036770	Ankyrin repeat-containing domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.