2REG

ABC-transporter choline binding protein in complex with choline

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	PUTATIVE GLYCINE BETAINE-BINDING ABC TRANSPORTER PROTEIN	polymer	298	32302.0	2	UniProt (Q92N37) Pfam (PF04069) In PDB	Rhizobium meliloti (Sinorhizobium meliloti)
2	A, B	CHOLINE ION	non-polymer		104.2	2	Chemie (CHT)
3		water	water		18.0	269	Chemie (HOH)

Sequence modifications

A, B: 28 - 318 (UniProt: Q92N37)

PDB	External Database	Details
Asp 251	Gly 251	engineered mutation
Glu 319	-	expression tag
His 320	-	expression tag
His 321	-	expression tag
His 322	-	expression tag
His 323	-	expression tag
His 324	-	expression tag
His 325	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	64604.0
Non-Polymers*	Number of molecules	2
	Total formula weight	208.3
All*	Total formula weight	64812.4

*Water molecules are not included.