1XED

Crystal Structure of a Ligand-Binding Domain of the Human Polymeric Ig Receptor, pIgR

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E... (A, B, C, D, E...)	Polymeric-immunoglobulin receptor	polymer	117	12958.4	6	UniProt (P01833) Pfam (PF07686)	Homo sapiens (human)	Poly-Ig receptor, PIGR, Ig-like V-type 1 Domain
2	G, H (A, B)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
3	I, J, K, L, M... (A, B, C, D, E...)	water	water		18.0	158	Chemie (HOH)

Sequence modifications

A, B, C, D, E, F: 1 - 109 (UniProt: P01833)

PDB	External Database	Details
Leu 110	-	expression tag
Glu 111	-	expression tag
His 112	-	expression tag
His 113	-	expression tag
His 114	-	expression tag
His 115	-	expression tag
His 116	-	expression tag
His 117	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	77750.1
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	77798.7

*Water molecules are not included.