Annotations: 2AB5

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d2ab5b1	Alpha and beta proteins (a+b)	Homing endonuclease-like	Homing endonucleases	automated matches	automated matches	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d2ab5a1	Alpha and beta proteins (a+b)	Homing endonuclease-like	Homing endonucleases	automated matches	automated matches	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Sigma_1_2	e2ab5B1	A: a/b three-layered sandwiches	X: HTH	H: Nudix	T: winged helix domain	F: Sigma_1_2	ECOD (v294.1)
A	Sigma_1_2	e2ab5A1	A: a/b three-layered sandwiches	X: Globin-like	H: Globin-like	T: Globin-like	F: Sigma_1_2	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.10.28.10	Alpha Beta	Roll	Endonuclease I-creI	Homing endonucleases	CATH (4.3.0)
A	3.10.28.10	Alpha Beta	Roll	Endonuclease I-creI	Homing endonucleases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00961	LAGLIDADG endonuclease (LAGLIDADG_1)	LAGLIDADG endonuclease		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	mRNA maturase	oxidoreductase activity catalytic activity endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid RNA binding binding nucleic acid binding electron transfer activity	RNA metabolic process mitochondrial mRNA processing primary metabolic process mitochondrial gene expression gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process mRNA processing mRNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process mitochondrial RNA processing nucleic acid biosynthetic process biosynthetic process RNA metabolic process mitochondrial mRNA processing primary metabolic process mitochondrial gene expression gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process mRNA processing mRNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process mitochondrial RNA processing nucleic acid biosynthetic process biosynthetic process metabolic process cellular process mitochondrial RNA metabolic process macromolecule metabolic process RNA processing aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain mitochondrial ATP synthesis coupled electron transport Group I intron splicing RNA splicing RNA splicing, via transesterification reactions with guanosine as nucleophile RNA splicing, via transesterification reactions	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
A, B	IPR027434	Homing endonuclease	Homologous Superfamily
A, B	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
A, B	IPR004860	Homing endonuclease, LAGLIDADG domain	Domain
A, B	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
A, B	IPR005797	Cytochrome b/b6, N-terminal domain	Domain

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.