6E0A

Crystal Structure of Helicobacter pylori TlpA Chemoreceptor Ligand Binding Domain

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 TlpA	polymer	295	33552.7	2	UniProt (A0A1U9IS38)	Helicobacter pylori SS1
2	C, D, E, F, H... (A, B)	ZINC ION	non-polymer		65.4	9	Chemie (ZN)
3	G (A)	CHLORIDE ION	non-polymer		35.5	1	Chemie (CL)
4	M (B)	2,3-DIHYDROXY-1,4-DITHIOBUTANE	non-polymer		154.3	1	Chemie (DTT)
5	N (B)	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
6	O, P (A, B)	water	water		18.0	156	Chemie (HOH)

Sequence modifications

A, B: 1 - 272 (UniProt: A0A1U9IS38)

PDB	External Database	Details
Met -22	-	initiating methionine
Gly -21	-	expression tag
His -20	-	expression tag
His -19	-	expression tag
His -18	-	expression tag
His -17	-	expression tag
His -16	-	expression tag
His -15	-	expression tag
Asp -14	-	expression tag
Tyr -13	-	expression tag
Asp -12	-	expression tag
Ile -11	-	expression tag
Pro -10	-	expression tag
Thr -9	-	expression tag
Thr -8	-	expression tag
Glu -7	-	expression tag
Asn -6	-	expression tag
Leu -5	-	expression tag
Tyr -4	-	expression tag
Phe -3	-	expression tag
Gln -2	-	expression tag
Gly -1	-	expression tag
Ser 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	67105.4
Non-Polymers*	Number of molecules	12
	Total formula weight	818.5
All*	Total formula weight	67923.9

*Water molecules are not included.