3ZQQ | pdb_00003zqq

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
Protein Family Annotation
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	Terminase_2_N	e3zqqA2	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, LuxR-like	F: Terminase_2_N	ECOD (1.6)
A	Terminase_2_C	e3zqqA1	A: a+b duplicates or obligate multimers	X: small terminase oligomerization domain (From Topology)	H: small terminase oligomerization domain (From Topology)	T: small terminase oligomerization domain	F: Terminase_2_C	ECOD (1.6)
B	Terminase_2_C	e3zqqB1	A: a+b duplicates or obligate multimers	X: small terminase oligomerization domain (From Topology)	H: small terminase oligomerization domain (From Topology)	T: small terminase oligomerization domain	F: Terminase_2_C	ECOD (1.6)
C	Terminase_2_N	e3zqqC2	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, LuxR-like	F: Terminase_2_N	ECOD (1.6)
C	Terminase_2_C	e3zqqC1	A: a+b duplicates or obligate multimers	X: small terminase oligomerization domain (From Topology)	H: small terminase oligomerization domain (From Topology)	T: small terminase oligomerization domain	F: Terminase_2_C	ECOD (1.6)

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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF03592	Terminase small subunit (Terminase_2)	Terminase small subunit	-	Family

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

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.