Annotations: 7ZOZ

Crystal structure of Siglec-15 in complex with Fab

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth H]	Serpin	e7zozH1	A: alpha arrays	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Serpin	ECOD (v295)
C [auth L]	Serpin	e7zozL1	A: alpha arrays	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Serpin	ECOD (v295)
A		e7zozA1	A: alpha arrays	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F:	ECOD (v295)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV1	-	sialic acid-binding ig-like lectin 15	SAbDab (2026-06-26)
C [auth L]	Light Chain	IGKV14	Kappa	sialic acid-binding ig-like lectin 15	SAbDab (2026-06-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF07686	Immunoglobulin V-set domain (V-set)	Immunoglobulin V-set domain	This domain is found in antibodies as well as neural protein P0 and CTL4 amongst others.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth H]	Anti-Siglec 15 Fab HC	-	-	-
C [auth L]	Anti-Siglec 15 Fab LC	-	-	-
A	Sialic acid-binding Ig-like lectin 15	-	multicellular organismal process regulation of biological process homeostatic process regulation of bone remodeling biological regulation tissue homeostasis regulation of tissue remodeling regulation of bone resorption bone resorption multicellular organismal-level homeostasis tissue remodeling bone remodeling anatomical structure homeostasis regulation of multicellular organismal process multicellular organismal process regulation of biological process homeostatic process regulation of bone remodeling biological regulation tissue homeostasis regulation of tissue remodeling regulation of bone resorption bone resorption multicellular organismal-level homeostasis tissue remodeling bone remodeling anatomical structure homeostasis regulation of multicellular organismal process myeloid leukocyte differentiation regulation of cellular process cellular developmental process regulation of developmental process cell development regulation of cell differentiation regulation of cell development multicellular organism development skeletal system development cell differentiation bone cell development osteoclast differentiation anatomical structure development regulation of immune system process regulation of osteoclast development bone development system development developmental process regulation of multicellular organismal development hemopoiesis animal organ development osteoclast development myeloid cell differentiation immune system process myeloid cell development regulation of hemopoiesis cellular process animal gross anatomical part developmental process leukocyte differentiation regulation of cytoskeleton organization regulation of cellular component organization regulation of actin filament-based process actin cytoskeleton organization regulation of organelle organization cellular component organization organelle organization regulation of actin cytoskeleton organization actin filament-based process cellular component organization or biogenesis cytoskeleton organization	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR013106	Immunoglobulin V-set domain	Domain
A	IPR003599	Immunoglobulin domain subtype	Domain
A	IPR042836	Sialic acid-binding Ig-like lectin 15	Family
A	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q6ZMC9	breast cancer gastric carcinoma carcinoma of esophagus interstitial cystitis ductal breast carcinoma in situ

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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.