1B3Q

CRYSTAL STRUCTURE OF CHEA-289, A SIGNAL TRANSDUCING HISTIDINE KINASE

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)	PROTEIN (CHEMOTAXIS PROTEIN CHEA)	polymer	379	42464.3	2	UniProt (Q56310) Pfam (PF02895) Pfam (PF02518) Pfam (PF01584)	Thermotoga maritima
2	C, D (A, B)	MERCURY (II) ION	non-polymer		200.6	2	Chemie (HG)
3	E, F (A, B)	water	water		18.0	187	Chemie (HOH)

Sequence modifications

A, B: 293 - 671 (UniProt: Q56310)

PDB	External Database	Details
Met 521	Ile 521	engineered mutation
Gly 522	Ser 522	engineered mutation
Cys 545	Gln 545	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	84928.7
Non-Polymers*	Number of molecules	2
	Total formula weight	401.2
All*	Total formula weight	85329.9

*Water molecules are not included.