3CM9

Solution Structure of Human SIgA2

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	Immunoglobulin heavy chain	polymer	462	49922.0	4		Homo sapiens (human)
2	J	Secretory component	polymer	106	11850.5	1	UniProt (P01833) Pfam (PF07686) In PDB	Homo sapiens (Human)
3	L, M, N, O	Immunoglobulin light chain	polymer	214	23216.8	4		Homo sapiens (human)
4	S	Secretory component	polymer	585	64355.2	1	UniProt (P01833) Pfam (PF07686) In PDB	Homo sapiens (Human)

Sequence modifications

J: 335 - 440 (UniProt: P01833)

PDB	External Database	Details
Ser 347	Gly 365	variant

S: 1 - 585 (UniProt: P01833)

PDB	External Database	Details
Ser 347	Gly 365	variant

Contents of the asymmetric unit

Polymers	Number of chains	10
	Total formula weight	368761.0
All*	Total formula weight	368761.0

*Water molecules are not included.