Annotations: 1LN0

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1ln0b_	Alpha and beta proteins (a+b)	GIY-YIG endonuclease	GIY-YIG endonuclease	GIY-YIG endonuclease	Homing endonuclease I-TevI	(Tequatrovirus T4 ) [TaxId: 10665 ],	SCOPe (2.08)
A	d1ln0a_	Alpha and beta proteins (a+b)	GIY-YIG endonuclease	GIY-YIG endonuclease	GIY-YIG endonuclease	Homing endonuclease I-TevI	(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)
B	SCOP2B Superfamily	GIY-YIG endonuclease	8043641	3000597	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	GIY-YIG endonuclease	8043641	3000597	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)
B	GIY-YIG	e1ln0B1	A: a+b three layers	X: GIY-YIG endonuclease (From Topology)	H: GIY-YIG endonuclease (From Topology)	T: GIY-YIG endonuclease	F: GIY-YIG	ECOD (1.6)
A	GIY-YIG	e1ln0A1	A: a+b three layers	X: GIY-YIG endonuclease (From Topology)	H: GIY-YIG endonuclease (From Topology)	T: GIY-YIG endonuclease	F: GIY-YIG	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.1440.10	Alpha Beta	3-Layer(aba) Sandwich	GIY-YIG endonuclease	GIY-YIG endonuclease	CATH (4.3.0)
A	3.40.1440.10	Alpha Beta	3-Layer(aba) Sandwich	GIY-YIG endonuclease	GIY-YIG endonuclease	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01541	GIY-YIG catalytic domain (GIY-YIG)	GIY-YIG catalytic domain	This domain called GIY-YIG is found in the amino terminal region of excinuclease abc subunit c (uvrC), bacteriophage T4 endonucleases segA, segB, segC, segD and segE; it is also found in putative endonucleases encoded by group I introns of fungi and ...	This domain called GIY-YIG is found in the amino terminal region of excinuclease abc subunit c (uvrC), bacteriophage T4 endonucleases segA, segB, segC, segD and segE; it is also found in putative endonucleases encoded by group I introns of fungi and phage. The structure of I-TevI a GIY-YIG endonuclease, reveals a novel alpha/beta-fold with a central three-stranded antiparallel beta-sheet flanked by three helices [4]. The most conserved and putative catalytic residues are located on a shallow, concave surface and include a metal coordination site.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	intron-associated endonuclease 1	DNA endonuclease activity endonuclease activity catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on a nucleic acid hydrolase activity double-stranded DNA endonuclease activity catalytic activity DNA nuclease activity DNA binding binding organic cyclic compound binding nucleic acid binding DNA endonuclease activity endonuclease activity catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on a nucleic acid hydrolase activity double-stranded DNA endonuclease activity catalytic activity DNA nuclease activity DNA binding binding organic cyclic compound binding nucleic acid binding cation binding transition metal ion binding zinc ion binding ion binding metal ion binding small molecule binding sequence-specific DNA binding transcription regulator activity DNA-binding transcription repressor activity DNA-binding transcription factor activity	regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process negative regulation of metabolic process primary metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process negative regulation of cellular process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process negative regulation of biosynthetic process cellular process DNA recombination DNA metabolic process intron homing	protein-containing complex transcription regulator complex transcription repressor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR006350	Intron endonuclease, group I	Family
A, B	IPR048681	Intron-encoded endonuclease 1, DNA-binding domain	Domain
A, B	IPR003611	Nuclease associated modular domain 3	Domain
A, B	IPR035901	GIY-YIG endonuclease superfamily	Homologous Superfamily
A, B	IPR000305	GIY-YIG endonuclease	Domain

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.