2D4U

Crystal Structure of the ligand binding domain of the bacterial serine chemoreceptor Tsr

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)	Methyl-accepting chemotaxis protein I	polymer	176	19836.9	2	UniProt (P02942) Pfam (PF02203)	Escherichia coli	MCP-I, Serine chemoreceptor protein
2	C, D (A, B)	water	water		18.0	424	Chemie (HOH)

Sequence modifications

A, B: 25 - 190 (UniProt: P02942)

PDB	External Database	Details
Gly 21	-	linker
Pro 22	-	linker
Leu 23	-	linker
Gly 24	-	linker
Cys 36	Asp 36	engineered mutation
His 191	-	expression tag
His 192	-	expression tag
His 193	-	expression tag
His 194	-	expression tag
His 195	-	expression tag
His 196	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	39673.8
All*	Total formula weight	39673.8

*Water molecules are not included.