8B23

Time-resolved structure of K+-dependent Na+-PPase from Thermotoga maritima 600-seconds post reaction initiation with Na+

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)	K(+)-stimulated pyrophosphate-energized sodium pump	polymer	735	78217.1	2	UniProt (Q9S5X0) Pfam (PF03030)	Thermotoga maritima	Membrane-bound sodium-translocating pyrophosphatase,Pyrophosphate-energized inorganic pyrophosphatase,Na(+)-PPase,Tm-PPase
2	C (A)	DIPHOSPHATE	non-polymer		173.9	1	Chemie (DPO)
3	D, E, F, G (A)	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)
4	H (A)	water	water		18.0	1	Chemie (HOH)

Sequence modifications

A, B: 2 - 726 (UniProt: Q9S5X0)

PDB	External Database	Details
Met -8	-	initiating methionine
Arg -7	-	expression tag
Gly -6	-	expression tag
Ser -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag
His 1	-	expression tag
Leu 353	Val 353	engineered mutation
Gly 395	Ser 395	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	156434.3
Non-Polymers*	Number of molecules	5
	Total formula weight	271.2
All*	Total formula weight	156705.4

*Water molecules are not included.