Annotations: 5WFE

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	CRISPR associated protein Cas1	8053176	3002164	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	CRISPR associated protein Cas1	8053176	3002164	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	CRISPR associated protein Cas1	8053176	3002164	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	CRISPR associated protein Cas1	8053176	3002164	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Cas2-like	8090691	3001363	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Cas2-like	8090691	3001363	SCOP2B (2022-06-29)
K	SCOP2B Superfamily	IHF-like DNA-binding proteins	8034409	3000426	SCOP2B (2022-06-29)
L	SCOP2B Superfamily	IHF-like DNA-binding proteins	8034410	3000426	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	Cas_Cas1	e5wfeA1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
B	Cas_Cas1	e5wfeB1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
C	Cas_Cas1	e5wfeC1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
D	Cas_Cas1	e5wfeD1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
E	Cas_Cas2CT1978	e5wfeE1	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR associated protein Cas2-like (From Topology)	T: CRISPR associated protein Cas2-like	F: Cas_Cas2CT1978	ECOD (1.6)
F	Cas_Cas2CT1978	e5wfeF1	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR associated protein Cas2-like (From Topology)	T: CRISPR associated protein Cas2-like	F: Cas_Cas2CT1978	ECOD (1.6)
K	Bac_DNA_binding	e5wfeK1	A: alpha arrays	X: HTH	H: IHF-like DNA-binding proteins (From Topology)	T: IHF-like DNA-binding proteins	F: Bac_DNA_binding	ECOD (1.6)
L	Bac_DNA_binding	e5wfeL1	A: alpha arrays	X: HTH	H: IHF-like DNA-binding proteins (From Topology)	T: IHF-like DNA-binding proteins	F: Bac_DNA_binding	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.100.10.20	Alpha Beta	Ribosomal Protein L15	Chain: K	domain 2	CATH (4.3.0)
A	1.20.120.920	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	CRISPR-associated endonuclease Cas1, C-terminal domain	CATH (4.3.0)
B	3.100.10.20	Alpha Beta	Ribosomal Protein L15	Chain: K	domain 2	CATH (4.3.0)
B	1.20.120.920	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	CRISPR-associated endonuclease Cas1, C-terminal domain	CATH (4.3.0)
C	3.100.10.20	Alpha Beta	Ribosomal Protein L15	Chain: K	domain 2	CATH (4.3.0)
C	1.20.120.920	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	CRISPR-associated endonuclease Cas1, C-terminal domain	CATH (4.3.0)
D	3.100.10.20	Alpha Beta	Ribosomal Protein L15	Chain: K	domain 2	CATH (4.3.0)
D	1.20.120.920	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	CRISPR-associated endonuclease Cas1, C-terminal domain	CATH (4.3.0)
K	4.10.520.10	Few Secondary Structures	Irregular	HU Protein	Chain A	CATH (4.3.0)
L	4.10.520.10	Few Secondary Structures	Irregular	HU Protein	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF01867	CRISPR associated protein Cas1 (Cas_Cas1)	CRISPR associated protein Cas1	-	Family
E, F	PF09707	CRISPR-associated protein (Cas_Cas2CT1978) (Cas_Cas2CT1978)	CRISPR-associated protein (Cas_Cas2CT1978)	-	Family
K	PF00216	Bacterial DNA-binding protein (Bac_DNA_binding)	Bacterial DNA-binding protein	-	Domain
L	PF00216	Bacterial DNA-binding protein (Bac_DNA_binding)	Bacterial DNA-binding protein	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	CRISPR-associated endonuclease Cas1	DNA binding binding organic cyclic compound binding nucleic acid binding endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 3'-phosphomonoesters endonuclease activity catalytic activity, acting on a nucleic acid hydrolase activity crossover junction DNA endonuclease activity DNA nuclease activity DNA endonuclease activity DNA endonuclease activity, producing 3'-phosphomonoesters catalytic activity, acting on DNA nuclease activity DNA binding binding organic cyclic compound binding nucleic acid binding endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 3'-phosphomonoesters endonuclease activity catalytic activity, acting on a nucleic acid hydrolase activity crossover junction DNA endonuclease activity DNA nuclease activity DNA endonuclease activity DNA endonuclease activity, producing 3'-phosphomonoesters catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds catalytic activity identical protein binding protein binding protein homodimerization activity protein dimerization activity 5'-flap endonuclease activity endodeoxyribonuclease activity, producing 5'-phosphomonoesters flap endonuclease activity endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters cation binding ion binding metal ion binding small molecule binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process metabolic process macromolecule metabolic process DNA repair maintenance of CRISPR repeat elements cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process metabolic process macromolecule metabolic process DNA repair maintenance of CRISPR repeat elements chromosome organization maintenance of DNA repeat elements cellular component organization organelle organization cellular component organization or biogenesis biological process involved in interspecies interaction between organisms response to other organism defense response defense response to symbiont response to external stimulus clearance of foreign intracellular nucleic acids response to biotic stimulus defense response to other organism CRISPR-cas system response to external biotic stimulus defense response to virus response to virus	intracellular anatomical structure cytoplasm cellular anatomical entity
E, F	CRISPR-associated endoribonuclease Cas2	DNA binding binding organic cyclic compound binding nucleic acid binding endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity catalytic activity	biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response defense response to symbiont response to external stimulus clearance of foreign intracellular nucleic acids response to biotic stimulus defense response to other organism response to stress CRISPR-cas system response to external biotic stimulus defense response to virus response to virus biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response defense response to symbiont response to external stimulus clearance of foreign intracellular nucleic acids response to biotic stimulus defense response to other organism response to stress CRISPR-cas system response to external biotic stimulus defense response to virus response to virus maintenance of CRISPR repeat elements chromosome organization primary metabolic process DNA metabolic process maintenance of DNA repeat elements nucleic acid metabolic process cellular component organization nucleobase-containing compound metabolic process organelle organization cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process	-
G	DNA (28-MER)	-	-	-
H	DNA (45-MER)	-	-	-
I	DNA (76-MER)	-	-	-
J	DNA (61-MER)	-	-	-
K	Integration host factor subunit alpha	DNA binding binding organic cyclic compound binding nucleic acid binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding transcription regulatory region nucleic acid binding transcription regulator activity DNA-binding transcription factor activity DNA-binding transcription activator activity structural molecule activity structural constituent of chromatin	regulation of cellular process cellular biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression protein metabolic process regulation of biosynthetic process regulation of biological process cellular metabolic process regulation of protein metabolic process biological regulation regulation of cellular metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression regulation of cellular process cellular biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression protein metabolic process regulation of biosynthetic process regulation of biological process cellular metabolic process regulation of protein metabolic process biological regulation regulation of cellular metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression translation macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process regulation of translation regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process RNA metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process DNA recombination DNA metabolic process	bacterial nucleoid protein-containing complex intracellular anatomical structure protein-DNA complex IHF-DNA complex nucleoid cellular anatomical entity DNA bending complex intracellular organelle organelle intracellular non-membrane-bounded organelle non-membrane-bounded organelle cytoplasm cytosol
L	Integration host factor subunit beta	DNA binding binding organic cyclic compound binding nucleic acid binding structural molecule activity structural constituent of chromatin	regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process metabolic process regulation of macromolecule biosynthetic process cellular process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process post-transcriptional regulation of gene expression protein metabolic process regulation of protein metabolic process translation regulation of translation DNA recombination DNA metabolic process	bacterial nucleoid protein-containing complex intracellular anatomical structure protein-DNA complex IHF-DNA complex nucleoid cellular anatomical entity DNA bending complex intracellular organelle organelle intracellular non-membrane-bounded organelle non-membrane-bounded organelle chromosome cytoplasm bacterial nucleoid protein-containing complex intracellular anatomical structure protein-DNA complex IHF-DNA complex nucleoid cellular anatomical entity DNA bending complex intracellular organelle organelle intracellular non-membrane-bounded organelle non-membrane-bounded organelle chromosome cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR002729	CRISPR-associated protein Cas1	Family
A, B, C, D	IPR033641	CRISPR-associated protein Cas1, type I-E	Family
A, B, C, D	IPR042206	CRISPR-associated endonuclease Cas1, C-terminal domain	Homologous Superfamily
A, B, C, D	IPR042211	CRISPR-associated endonuclease Cas1, N-terminal domain	Homologous Superfamily
A, B, C, D	IPR019851	CRISPR-associated protein Cas1, ECOLI subtype	Family
A, B, C, D	IPR050646	CRISPR-associated endonuclease Cas1	Family
E, F	IPR010152	CRISPR-associated protein Cas2 subtype	Family
K	IPR010992	Integration host factor (IHF)-like DNA-binding domain superfamily	Homologous Superfamily
K	IPR020816	Histone-like DNA-binding protein, conserved site	Conserved Site
K	IPR005684	Integration host factor, alpha subunit	Family
K	IPR000119	Histone-like DNA-binding protein	Family
L	IPR010992	Integration host factor (IHF)-like DNA-binding domain superfamily	Homologous Superfamily
L	IPR020816	Histone-like DNA-binding protein, conserved site	Conserved Site
L	IPR005685	Integration host factor, beta subunit	Family
L	IPR000119	Histone-like DNA-binding 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.