Annotations: 4QPY

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4qpya_	All beta proteins	TNF-like	TNF-like	automated matches	automated matches	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B	d4qpyb_	All beta proteins	TNF-like	TNF-like	automated matches	automated matches	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C	d4qpyc_	All beta proteins	TNF-like	TNF-like	automated matches	automated matches	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	TNF-like	8070837	4000294	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	TNF-like	8070838	3000061	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	TNF-like	8070838	3000061	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	TNF-like	8070838	3000061	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	PF00386	e4qpyA1	A: beta sandwiches	X: jelly-roll	H: TNF-like (From Topology)	T: TNF-like	F: PF00386	ECOD (1.6)
B	PF00386	e4qpyB1	A: beta sandwiches	X: jelly-roll	H: TNF-like (From Topology)	T: TNF-like	F: PF00386	ECOD (1.6)
C	PF00386	e4qpyC1	A: beta sandwiches	X: jelly-roll	H: TNF-like (From Topology)	T: TNF-like	F: PF00386	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.120.40	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
B	2.60.120.40	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
C	2.60.120.40	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF00386	C1q domain (C1q)	C1q domain	C1q is a subunit of the C1 enzyme complex that activates the serum complement system.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	Complement C1q-like protein 2	identical protein binding protein binding binding	protein localization protein localization to postsynaptic specialization membrane cellular localization protein localization to postsynaptic membrane protein localization to cell periphery protein localization to synapse biological regulation localization within membrane protein localization to membrane protein-containing complex localization neurotransmitter receptor localization to postsynaptic specialization membrane localization regulation of postsynaptic membrane neurotransmitter receptor levels protein localization to organelle cellular macromolecule localization protein localization protein localization to postsynaptic specialization membrane cellular localization protein localization to postsynaptic membrane protein localization to cell periphery protein localization to synapse biological regulation localization within membrane protein localization to membrane protein-containing complex localization neurotransmitter receptor localization to postsynaptic specialization membrane localization regulation of postsynaptic membrane neurotransmitter receptor levels protein localization to organelle cellular macromolecule localization macromolecule localization cellular process protein localization to postsynapse regulation of biological quality protein localization to cell junction receptor localization to synapse developmental process multicellular organismal process regulation of biological process regulation of cellular component organization regulation of cellular process regulation of developmental process nervous system development developmental maturation synapse maturation cellular component organization regulation of synapse organization multicellular organism development regulation of synapse maturation cell junction organization anatomical structure development regulation of synapse structure or activity synapse organization cellular component organization or biogenesis system development cellular component biogenesis cellular component assembly cell junction assembly postsynaptic density organization postsynapse organization organelle assembly postsynaptic specialization assembly postsynapse assembly excitatory synapse assembly organelle organization postsynaptic specialization organization synapse assembly postsynaptic density assembly	protein-containing complex collagen trimer neuron to neuron synapse synapse cell junction hippocampal mossy fiber to CA3 synapse cellular anatomical entity extracellular region synaptic cleft cerebellar climbing fiber to Purkinje cell synapse asymmetric synapse glutamatergic synapse excitatory synapse asymmetric, glutamatergic, excitatory synapse

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR008983	Tumour necrosis factor-like domain superfamily	Homologous Superfamily
A, B, C	IPR001073	C1q domain	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.