2ZSU

Crystal structure of spermidine synthase from Pyrococcus horikoshii OT3, P1 form

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E...	spermidine synthase	polymer	280	32010.8	6	UniProt (O57950) Pfam (PF17284) Pfam (PF01564) In PDB	Pyrococcus horikoshii	Putrescine aminopropyltransferase, PAPT, SPDSY
2	A, C, E	1-{4-[(3-aminopropyl)amino]butyl}guanidine	non-polymer		187.3	3	Chemie (AG3)
3		water	water		18.0	930	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	192065.0
Non-Polymers*	Number of molecules	3
	Total formula weight	561.9
All*	Total formula weight	192626.8

*Water molecules are not included.