Annotations: 1FJR

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1fjra_	All beta proteins	Methuselah ectodomain	Methuselah ectodomain	Methuselah ectodomain	Methuselah ectodomain	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
B	d1fjrb_	All beta proteins	Methuselah ectodomain	Methuselah ectodomain	Methuselah ectodomain	Methuselah ectodomain	fruit fly (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Methuselah ectodomain	8020710	4003302	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Methuselah ectodomain	8033090	3000566	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Methuselah ectodomain	8033090	3000566	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	PF06652	e1fjrA2	A: beta barrels	X: SH3	H: Methuselah ectodomain (From Topology)	T: Methuselah ectodomain	F: PF06652	ECOD (1.6)
B	PF06652	e1fjrB2	A: beta barrels	X: SH3	H: Methuselah ectodomain (From Topology)	T: Methuselah ectodomain	F: PF06652	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.160.11	Mainly Beta	Roll	Methuselah Ectodomain	Chain: A, domain 1	CATH (4.3.0)
A	2.170.180.11	Mainly Beta	Beta Complex	Methuselah ectodomain, domain 2	Methuselah ectodomain, domain 2	CATH (4.3.0)
B	2.30.160.11	Mainly Beta	Roll	Methuselah Ectodomain	Chain: A, domain 1	CATH (4.3.0)
B	2.170.180.11	Mainly Beta	Beta Complex	Methuselah ectodomain, domain 2	Methuselah ectodomain, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF06652	Methuselah N-terminus (Methuselah_N)	Methuselah N-terminus	This family represents the N-terminal region of the Drosophila specific Methuselah protein. Drosophila Methuselah (Mth) mutants have a 35% increase in average lifespan and increased resistance to several forms of stress, including heat, starvation, a ...	This family represents the N-terminal region of the Drosophila specific Methuselah protein. Drosophila Methuselah (Mth) mutants have a 35% increase in average lifespan and increased resistance to several forms of stress, including heat, starvation, and oxidative damage. The protein affected by this mutation is related to G protein-coupled receptors of the secretin receptor family. Mth, like secretin receptor family members, has a large N-terminal ectodomain, which may constitute the ligand binding site [1]. This family is found in conjunction with Pfam:PF00002.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	METHUSELAH ECTODOMAIN	molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity peptide receptor activity G protein-coupled peptide receptor activity binding peptide binding	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation cellular process signal transduction cell communication multicellular organismal process determination of adult lifespan response to organic substance response to paraquat cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation cellular process signal transduction cell communication multicellular organismal process determination of adult lifespan response to organic substance response to paraquat response to chemical G protein-coupled receptor signaling pathway cellular localization regulated exocytosis transport synaptic vesicle cycle synaptic vesicle exocytosis vesicle-mediated transport vesicle-mediated transport in synapse localization synaptic signaling secretion by cell signal release establishment of localization in cell trans-synaptic signaling neurotransmitter secretion secretion cell-cell signaling export from cell neurotransmitter transport establishment of localization chemical synaptic transmission signal release from synapse exocytosis anterograde trans-synaptic signaling response to stress response to heat response to abiotic stimulus response to temperature stimulus response to oxidative stress response to oxygen-containing compound response to reactive oxygen species response to nutrient levels response to starvation	membrane cellular anatomical entity cell periphery plasma membrane presynapse synapse cell junction

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR010596	Methuselah, N-terminal domain	Domain
A, B	IPR023311	Methuselah ectodomain, domain 2	Homologous Superfamily
A, B	IPR044860	Methuselah ectodomain, domain 1	Homologous Superfamily
A, B	IPR000832	GPCR, family 2, secretin-like	Family
A, B	IPR036272	Methuselah, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR017981	GPCR, family 2-like, 7TM	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Transmembrane	Alpha-helical polytopic	Rhodopsin-like receptors and pumps	GPCR Secretin (B) family

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.