Annotations: 9Q41

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Spermidine synthase	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity spermidine synthase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity	polyamine metabolic process amine metabolic process biogenic amine biosynthetic process spermidine metabolic process biosynthetic process amine biosynthetic process polyamine biosynthetic process metabolic process cellular process spermidine biosynthetic process biogenic amine metabolic process response to peptide response to stimulus response to chemical polyamine metabolic process amine metabolic process biogenic amine biosynthetic process spermidine metabolic process biosynthetic process amine biosynthetic process polyamine biosynthetic process metabolic process cellular process spermidine biosynthetic process biogenic amine metabolic process response to peptide response to stimulus response to chemical response to cytokine response to leukemia inhibitory factor cellular response to cytokine stimulus cellular response to leukemia inhibitory factor	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

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

Chains	Drug Target	Associated Disease
A, B	Pharos: P19623	Adenocarcinoma of Lung Ewing sarcoma lung adenocarcinoma pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia ulcerative colitis androgenetic alopecia interstitial cystitis lung cancer pancreatic intraductal papillary-mucinous carcinoma psoriasis large cell medulloblastoma ovarian cancer pancreatic intraductal papillary-mucinous neoplasm Sjogren syndrome