3BWC

Crystal structure of spermidine synthase from Trypanosoma cruzi in complex with SAM at 2.3 A resolution

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Spermidine synthase	polymer	304	34525.8	2	UniProt (Q4DA73) Pfam (PF17284) Pfam (PF01564)	Trypanosoma cruzi
2	C, E (A, B)	S-ADENOSYLMETHIONINE	non-polymer		398.4	2	Chemie (SAM)
3	D, F (A, B)	BETA-MERCAPTOETHANOL	non-polymer		78.1	2	Chemie (BME)
4	G, H (A, B)	water	water		18.0	424	Chemie (HOH)

Sequence modifications

A, B: 9 - 304 (UniProt: Q4DA73)

PDB	External Database	Details
Mse 1	-	expression tag
Ala 2	-	expression tag
His 3	-	expression tag
His 4	-	expression tag
His 5	-	expression tag
His 6	-	expression tag
His 7	-	expression tag
His 8	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	69051.5
Non-Polymers*	Number of molecules	4
	Total formula weight	953.1
All*	Total formula weight	70004.7

*Water molecules are not included.