Annotations: 8SMM

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth H]	Asn_synthase	e8smmH01	A: alpha bundles	X: Helical bundle insertion in helicase domains	H: Helical bundle in Hef helicase	T: Helical bundle in Hef helicase	F: Asn_synthase	ECOD (develop294)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV1	Kappa	hyaluronan synthase 1	SAbDab (2026-03-20)
B [auth H]	Heavy Chain	IGHV3	-	hyaluronan synthase 1	SAbDab (2026-03-20)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth L]	Fab15 light chain	-	-	-
B [auth H]	Fab15 heavy chain	-	-	-
A	Hyaluronan synthase 1	UDP-glycosyltransferase activity glycosyltransferase activity transferase activity hyaluronan synthase activity hexosyltransferase activity catalytic activity	cellular component biogenesis cellular component organization cellular component assembly cellular process extracellular matrix organization cellular component organization or biogenesis extracellular matrix assembly extracellular structure organization external encapsulating structure organization carbohydrate metabolic process polysaccharide metabolic process biosynthetic process polysaccharide biosynthetic process carbohydrate biosynthetic process cellular component biogenesis cellular component organization cellular component assembly cellular process extracellular matrix organization cellular component organization or biogenesis extracellular matrix assembly extracellular structure organization external encapsulating structure organization carbohydrate metabolic process polysaccharide metabolic process biosynthetic process polysaccharide biosynthetic process carbohydrate biosynthetic process metabolic process primary metabolic process macromolecule metabolic process macromolecule biosynthetic process carbohydrate derivative biosynthetic process glycosaminoglycan metabolic process carbohydrate derivative metabolic process hyaluronan biosynthetic process hyaluronan metabolic process aminoglycan metabolic process aminoglycan biosynthetic process glycosaminoglycan biosynthetic process	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR029044	Nucleotide-diphospho-sugar transferases	Homologous Superfamily

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Celluose Synthases	hyaluronan synthase 1 (has1)

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.