Annotations: 3ZQQ

Crystal structure of the full-length small terminase from a SPP1-like bacteriophage

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Homeodomain-like	8101823	3000001	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Homeodomain-like	8101823	3000001	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	PI3_PI4_kinase	e3zqqA1	A: beta barrels	X: Transmembrane heme-binding four-helical bundle	H: Anticodon-binding domain of Class II aaRS	T: Anticodon-binding domain of Class II aaRS	F: PI3_PI4_kinase	ECOD (v294.2)
B	DHDPS	e3zqqB1	A: beta barrels	X: Lipocalins/Streptavidin	H: SH3	T: Transmembrane protein 14A	F: DHDPS	ECOD (v294.2)
C	PI3_PI4_kinase	e3zqqC1	A: beta barrels	X: Transmembrane heme-binding four-helical bundle	H: Anticodon-binding domain of Class II aaRS	T: Anticodon-binding domain of Class II aaRS	F: PI3_PI4_kinase	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.1400	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Terminase, small subunit, N-terminal DNA-binding domain, HTH motif	CATH (4.3.0)
A	6.10.140.2160	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
B	6.10.140.2160	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
C	1.10.10.1400	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Terminase, small subunit, N-terminal DNA-binding domain, HTH motif	CATH (4.3.0)
C	6.10.140.2160	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	TERMINASE SMALL SUBUNIT	DNA binding binding nucleic acid binding identical protein binding protein binding	cellular component organization organelle organization chromosome organization cellular process cellular component organization or biogenesis	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR038713	Terminase small subunit, N-terminal DNA-binding domain, HTH motif superfamily	Homologous Superfamily
A, B, C	IPR005335	Terminase small subunit	Family
A, B, C	IPR052404	SPP1-like small terminase	Family

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.