Annotations: 8IYI

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Cullin_AB	e8iyiB1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Cullin_AB	ECOD (v294.1)
A	zf-rbx1	e8iyiA1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: zf-rbx1	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF17284	Spermidine synthase tetramerisation domain (Spermine_synt_N)	Spermidine synthase tetramerisation domain	This domain represents the N-terminal tetramerization domain from spermidine synthase.	Domain
A, B	PF01564	Spermine/spermidine synthase domain (Spermine_synth)	Spermine/spermidine synthase domain	Spermine and spermidine are polyamines. This family includes spermidine synthase that catalyses the fifth (last) step in the biosynthesis of spermidine from arginine, and spermine synthase.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	KLLA0B09372p	spermidine synthase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity	pantothenate metabolic process water-soluble vitamin biosynthetic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process modified amino acid biosynthetic process carboxylic acid metabolic process modified amino acid metabolic process vitamin biosynthetic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process vitamin metabolic process biosynthetic process pantothenate biosynthetic process pantothenate metabolic process water-soluble vitamin biosynthetic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process modified amino acid biosynthetic process carboxylic acid metabolic process modified amino acid metabolic process vitamin biosynthetic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process vitamin metabolic process biosynthetic process pantothenate biosynthetic process small molecule metabolic process metabolic process cellular process monocarboxylic acid metabolic process polyamine metabolic process amine metabolic process biogenic amine biosynthetic process spermidine metabolic process amine biosynthetic process polyamine biosynthetic process spermidine biosynthetic process biogenic amine metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR030668	Spermidine/spermine synthase, eukaryotes	Family
A, B	IPR001045	Spermidine/spermine synthases	Family
A, B	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	Homologous Superfamily
A, B	IPR030374	Polyamine biosynthesis domain	Domain
A, B	IPR037163	Spermidine synthase, tetramerisation domain superfamily	Homologous Superfamily
A, B	IPR030373	Polyamine biosynthesis domain, conserved site	Conserved Site
A, B	IPR035246	Spermidine synthase, tetramerisation domain	Domain

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.