4YMX

Crystal structure of the substrate binding protein of an amino acid ABC 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	ABC-type amino acid transport system, periplasmic component	polymer	260	28888.5	2	UniProt (Q8RCC4) Pfam (PF00497) In PDB	Caldanaerobacter subterraneus subsp. tengcongensis MB4	SBP
2	A, B	ARGININE	non-polymer		175.2	2	Chemie (ARG)
3		water	water		18.0	747	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	57777.0
Non-Polymers*	Number of molecules	2
	Total formula weight	350.4
All*	Total formula weight	58127.4

*Water molecules are not included.