3BXZ

Crystal structure of the isolated DEAD motor domains from Escherichia coli SecA

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)	Preprotein translocase subunit secA	polymer	471	52612.9	2	UniProt (P10408) Pfam (PF07517) Pfam (PF21090)	Escherichia coli
2	C, F (A, B)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
3	D, G (A, B)	SPERMIDINE	non-polymer		145.2	2	Chemie (SPD)
4	E, H (A, B)	ADENOSINE-5'-DIPHOSPHATE	non-polymer		427.2	2	Chemie (ADP)
5	I, J (A, B)	water	water		18.0	171	Chemie (HOH)

Sequence modifications

A, B: 6 - 227 (UniProt: P10408)

PDB	External Database	Details
Met -1	-	expression tag
His 0	-	expression tag
His 1	-	expression tag
His 2	-	expression tag
His 3	-	expression tag
His 4	-	expression tag
His 5	-	expression tag

A, B: 368 - 609 (UniProt: P10408)

PDB	External Database	Details
Ala 368	Glu 368	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	105225.8
Non-Polymers*	Number of molecules	6
	Total formula weight	1193.5
All*	Total formula weight	106419.3

*Water molecules are not included.