1I5N

Crystal structure of the P1 domain of CheA from Salmonella typhimurium

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	CHEMOTAXIS PROTEIN CHEA	polymer	146	16902.8	4	UniProt (P09384) Pfam (PF01627) In PDB	Salmonella typhimurium
2	A	SULFATE ION	non-polymer		96.1	1	Chemie (SO4)
3		water	water		18.0	215	Chemie (HOH)

Sequence modifications

A, B, C, D: 1 - 138 (UniProt: P09384)

PDB	External Database	Details
Mse 1	Met 1	MODIFIED RESIDUE
Mse 3	Met 3	MODIFIED RESIDUE
Mse 23	Met 23	MODIFIED RESIDUE
Mse 69	Met 69	MODIFIED RESIDUE
Mse 81	Met 81	MODIFIED RESIDUE
Mse 98	Met 98	MODIFIED RESIDUE
Arg 139	-	EXPRESSION TAG
Ser 140	-	EXPRESSION TAG
His 141	-	EXPRESSION TAG
His 142	-	EXPRESSION TAG
His 143	-	EXPRESSION TAG
His 144	-	EXPRESSION TAG
His 145	-	EXPRESSION TAG
His 146	-	EXPRESSION TAG

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	67611.1
Non-Polymers*	Number of molecules	1
	Total formula weight	96.1
All*	Total formula weight	67707.1

*Water molecules are not included.