Annotations: 1C1K

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1c1ka_	All alpha proteins	gene 59 helicase assembly protein	gene 59 helicase assembly protein	gene 59 helicase assembly protein	gene 59 helicase assembly protein	(Tequatrovirus T4 ) [TaxId: 10665 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	gene 59 helicase assembly protein	8026293	4001380	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	gene 59 helicase assembly protein	8038672	3001429	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	T4_Gp59_N	e1c1kA1	A: alpha complex topology	X: gene 59 helicase assembly protein (From Topology)	H: gene 59 helicase assembly protein (From Topology)	T: gene 59 helicase assembly protein	F: T4_Gp59_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.8.60	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)
A	1.10.220.50	Mainly Alpha	Orthogonal Bundle	Annexin V	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF08993	T4 gene Gp59 loader of gp41 DNA helicase (T4_Gp59_N)	T4 gene Gp59 loader of gp41 DNA helicase	Bacteriophage T4 gene-59 helicase assembly protein is required for recombination-dependent DNA replication, which is the predominant mode of DNA replication in the late stage of T4 infection. T4 gene-59 helicase assembly protein accelerates the loadi ...	Bacteriophage T4 gene-59 helicase assembly protein is required for recombination-dependent DNA replication, which is the predominant mode of DNA replication in the late stage of T4 infection. T4 gene-59 helicase assembly protein accelerates the loading of the T4 gene-41 helicase during DNA synthesis by the T4 replication system in vitro. T4 gene-59 helicase assembly protein binds to both T4 gene-41 helicase and T4 gene-32 single-stranded DNA binding protein, and to single and double-stranded DNA. The structure of T4 gene-59 helicase assembly protein reveals a novel alpha-helical bundle fold with two domains of similar size, this being the N-terminal domain that consists of six alpha-helices linked by loop segments and short turns. The surface of the domain contains large regions of exposed hydrophobic residues and clusters of acidic and basic residues. This domain has structural similarity to members of the high-mobility-group (HMG) family of DNA minor groove binding proteins including rat HMG1A and lymphoid enhancer-binding factor, and is required for binding of the helicase to the DNA minor groove [1].	Domain
A	PF08994	T4 gene Gp59 loader of gp41 DNA helicase C-term (T4_Gp59_C)	T4 gene Gp59 loader of gp41 DNA helicase C-term	Bacteriophage T4 gene-59 helicase assembly protein is required for recombination-dependent DNA replication, which is the predominant mode of DNA replication in the late stage of T4 infection. T4 gene-59 helicase assembly protein accelerates the loadi ...	Bacteriophage T4 gene-59 helicase assembly protein is required for recombination-dependent DNA replication, which is the predominant mode of DNA replication in the late stage of T4 infection. T4 gene-59 helicase assembly protein accelerates the loading of the T4 gene-41 helicase during DNA synthesis by the T4 replication system in vitro. T4 gene-59 helicase assembly protein binds to both T4 gene-41 helicase and T4 gene-32 single-stranded DNA binding protein, and to single and double-stranded DNA. The structure of T4 gene-59 helicase assembly protein reveals a novel alpha-helical bundle fold with two domains of similar size, this being the C-terminal domain that consists of seven alpha-helices with short intervening loops and turns. The surface of the domain contains large regions of exposed hydrophobic residues and clusters of acidic and basic residues. The hydrophobic region on the 'bottom' surface of the domain near the C-terminal helix binds the leading strand DNA, whilst the hydrophobic region on the 'top' surface of the domain lies between the two arms of the fork DNA, allowing for T4 gene 41 helicase binding and assembly into a hexameric complex around the lagging strand [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	BPT4 GENE 59 HELICASE ASSEMBLY PROTEIN	DNA binding binding nucleic acid binding	nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process viral DNA genome replication viral life cycle nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid biosynthetic process biosynthetic process nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process viral DNA genome replication viral life cycle nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid biosynthetic process biosynthetic process viral genome replication viral process bidirectional double-stranded viral DNA replication DNA biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015085	Bacteriophage T4, Gp59, helicase assembly protein, N-terminal	Domain
A	IPR015086	Bacteriophage T4, Gp59, helicase assembly protein, C-terminal	Domain
A	IPR037082	Bacteriophage T4, Gp59, helicase assembly protein, C-terminal domain superfamily	Homologous Superfamily
A	IPR023197	Bacteriophage T4, Gp59, helicase assembly protein domain superfamily	Homologous Superfamily
A	IPR008944	Bacteriophage T4, Gp59, helicase assembly protein	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.