1PC3

Crystal structure of the extracellular phosphate ABC transport receptor (PstS-1) and immunodominant antigen of M. tuberculosis.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Phosphate-binding protein 1	polymer	350	35820.8	2	UniProt (P15712) Pfam (PF01547) UniProt (by SIFTS) (P9WGU1) In PDB	Mycobacterium tuberculosis	PBP-1, PstS-1, Protein antigen B, PAB, Antigen Ag78
2	A, B	PHOSPHATE ION	non-polymer		95.0	2	Chemie (PO4)
3		water	water		18.0	240	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	71641.6
Non-Polymers*	Number of molecules	2
	Total formula weight	189.9
All*	Total formula weight	71831.5

*Water molecules are not included.