7PSG

Structure of the ligand binding domain of the PacA (ECA2226) chemoreceptor of Pectobacterium atrosepticum SCRI1043 in complex with betaine.

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 (A, B, C, D)	Methyl-accepting chemotaxis protein	polymer	301	33223.1	4	UniProt (Q6D515) Pfam (PF02743)	Pectobacterium atrosepticum SCRI1043
2	E, G, I, K (A, B, C, D)	TRIMETHYL GLYCINE	non-polymer		118.2	4	Chemie (BET)
3	F, H, J, L (A, B, C, D)	GLYCEROL	non-polymer		92.1	4	Chemie (GOL)
4	M, N, O, P (A, B, C, D)	water	water		18.0	395	Chemie (HOH)

Sequence modifications

A, B, C, D: 20 - 289 (UniProt: Q6D515)

PDB	External Database	Details
Met -11	-	initiating methionine
Gly -10	-	expression tag
Ser -9	-	expression tag
Ser -8	-	expression tag
His -7	-	expression tag
His -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
Ser -1	-	expression tag
Ser 0	-	expression tag
Gly 1	-	expression tag
Leu 2	-	expression tag
Val 3	-	expression tag
Pro 4	-	expression tag
Arg 5	-	expression tag
Gly 6	-	expression tag
Ser 7	-	expression tag
His 8	-	expression tag
Ser 9	-	expression tag
Trp 10	-	expression tag
Gln 11	-	expression tag
Ser 12	-	expression tag
Ser 13	-	expression tag
Ser 14	-	expression tag
Glu 15	-	expression tag
Gln 16	-	expression tag
Lys 17	-	expression tag
Ser 18	-	expression tag
Leu 19	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	132892.2
Non-Polymers*	Number of molecules	8
	Total formula weight	841.0
All*	Total formula weight	133733.2

*Water molecules are not included.