Annotations: 1GPQ

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1gpqa_	Alpha and beta proteins (a+b)	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme, Ivy	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
B	d1gpqb_	Alpha and beta proteins (a+b)	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme, Ivy	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
C	d1gpqc_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	C-type lysozyme	Lysozyme	(Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
D	d1gpqd_	Alpha and beta proteins (a+b)	Lysozyme-like	Lysozyme-like	C-type lysozyme	Lysozyme	(Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Inhibitor of vertebrate lysozyme Ivy	8032078	4000611	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Inhibitor of vertebrate lysozyme Ivy	8044456	3000740	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Inhibitor of vertebrate lysozyme Ivy	8044456	3000740	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Lysozyme-like	8037428	3001879	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Lysozyme-like	8037428	3001879	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	Ivy	e1gpqA1	A: a+b three layers	X: Nat/Ivy	H: Inhibitor of vertebrate lysozyme, Ivy (From Topology)	T: Inhibitor of vertebrate lysozyme, Ivy	F: Ivy	ECOD (1.6)
B	Ivy	e1gpqB1	A: a+b three layers	X: Nat/Ivy	H: Inhibitor of vertebrate lysozyme, Ivy (From Topology)	T: Inhibitor of vertebrate lysozyme, Ivy	F: Ivy	ECOD (1.6)
C	Lys	e1gpqC1	A: a+b complex topology	X: Lysozyme-like (From Homology)	H: Lysozyme-like	T: Lysozyme-like	F: Lys	ECOD (1.6)
D	Lys	e1gpqD1	A: a+b complex topology	X: Lysozyme-like (From Homology)	H: Lysozyme-like	T: Lysozyme-like	F: Lys	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.1420.10	Alpha Beta	3-Layer(aba) Sandwich	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme	CATH (4.3.0)
B	3.40.1420.10	Alpha Beta	3-Layer(aba) Sandwich	Inhibitor of vertebrate lysozyme, Ivy	Inhibitor of vertebrate lysozyme	CATH (4.3.0)
C	1.10.530.10	Mainly Alpha	Orthogonal Bundle	Lysozyme		CATH (4.3.0)
D	1.10.530.10	Mainly Alpha	Orthogonal Bundle	Lysozyme		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF08816	Inhibitor of vertebrate lysozyme (Ivy) (Ivy)	Inhibitor of vertebrate lysozyme (Ivy)	-	Family
C, D	PF00062	C-type lysozyme/alpha-lactalbumin family (Lys)	C-type lysozyme/alpha-lactalbumin family	Alpha-lactalbumin is the regulatory subunit of lactose synthase, changing the substrate specificity of galactosyltransferase from N-acetylglucosamine to glucose. C-type lysozymes are secreted bacteriolytic enzymes that cleave the peptidoglycan of bac ...	Alpha-lactalbumin is the regulatory subunit of lactose synthase, changing the substrate specificity of galactosyltransferase from N-acetylglucosamine to glucose. C-type lysozymes are secreted bacteriolytic enzymes that cleave the peptidoglycan of bacterial cell walls. Structure is a multi-domain, mixed alpha and beta fold, containing four conserved disulfide bonds.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	INHIBITOR OF VERTEBRATE LYSOZYME	enzyme regulator activity molecular function inhibitor activity lysozyme inhibitor activity molecular function regulator activity enzyme inhibitor activity identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process primary metabolic process gene expression chaperone-mediated protein folding macromolecule biosynthetic process protein maturation organic substance metabolic process protein folding biosynthetic process organic substance biosynthetic process metabolic process cellular process organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process primary metabolic process gene expression chaperone-mediated protein folding macromolecule biosynthetic process protein maturation organic substance metabolic process protein folding biosynthetic process organic substance biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process	outer membrane-bounded periplasmic space cell envelope periplasmic space cellular anatomical entity
C, D	LYSOZYME C	hydrolase activity, acting on glycosyl bonds hexosaminidase activity beta-N-acetylhexosaminidase activity beta-N-acetylglucosaminidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity peptidoglycan muralytic activity lysozyme activity identical protein binding protein binding binding	organic substance metabolic process catabolic process cell wall organization or biogenesis metabolic process cellular process macromolecule metabolic process organic substance catabolic process macromolecule catabolic process cell wall macromolecule catabolic process cell wall macromolecule metabolic process biological process involved in interspecies interaction between organisms disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism organic substance metabolic process catabolic process cell wall organization or biogenesis metabolic process cellular process macromolecule metabolic process organic substance catabolic process macromolecule catabolic process cell wall macromolecule catabolic process cell wall macromolecule metabolic process biological process involved in interspecies interaction between organisms disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing response to stimulus response to other organism defense response response to external stimulus defense response to Gram-negative bacterium response to biotic stimulus defense response to bacterium defense response to other organism response to stress response to bacterium response to external biotic stimulus defense response to Gram-positive bacterium	intracellular anatomical structure cytoplasm cellular anatomical entity extracellular region extracellular space membrane-bounded organelle intracellular organelle organelle endoplasmic reticulum intracellular membrane-bounded organelle endomembrane system

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR014453	Inhibitor of vertebrate lysozyme	Family
A, B	IPR036501	Inhibitor of vertebrate lysozyme superfamily	Homologous Superfamily
C, D	IPR001916	Glycoside hydrolase, family 22	Family
C, D	IPR023346	Lysozyme-like domain superfamily	Homologous Superfamily
C, D	IPR019799	Glycoside hydrolase family 22 domain	Domain
C, D	IPR000974	Glycoside hydrolase, family 22, lysozyme	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.