2R6G

The Crystal Structure of the E. coli Maltose Transporter

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)	Maltose/maltodextrin import ATP-binding protein malK	polymer	381	42183.6	2	UniProt (Q1R3Q1) Pfam (PF00005) Pfam (PF08402) UniProt (by SIFTS) (P68187)	Escherichia coli
2	C (E)	Maltose-binding periplasmic protein	polymer	370	40753.2	1	UniProt (P0AEX9) Pfam (PF01547)	Escherichia coli	Maltodextrin-binding protein, MBP
3	D (F)	Maltose transport system permease protein malF	polymer	514	57052.9	1	UniProt (P02916) Pfam (PF20872) Pfam (PF14785) Pfam (PF00528)	Escherichia coli
4	E (G)	Maltose transport system permease protein malG	polymer	296	32246.2	1	UniProt (P68183) Pfam (PF00528)	Escherichia coli
5	F (C)	alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose	branched		342.3	1	In PDB BIRD (PRD_900001) GlyTouCan (G07411ON)		alpha-maltose
6	G, H (A, B)	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	2	Chemie (ATP)

Sequence modifications

A, B: 1 - 371 (UniProt: Q1R3Q1)

PDB	External Database	Details
Gln 159	Glu 159	engineered mutation
Ala 372	-	expression tag
Ser 373	-	expression tag
Ala 374	-	expression tag
Ser 375	-	expression tag
His 376	-	expression tag
His 377	-	expression tag
His 378	-	expression tag
His 379	-	expression tag
His 380	-	expression tag
His 381	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	214419.4
Branched	Number of molecules	1
	Total formula weight	342.3
Non-Polymers*	Number of molecules	2
	Total formula weight	1014.4
All*	Total formula weight	215776.0

*Water molecules are not included.