2BGG

The structure of a Piwi protein from Archaeoglobus fulgidus complexed with a 16nt siRNA duplex.

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)	PROTEIN AF1318	polymer	427	49302.4	2	UniProt (O28951) Pfam (PF02171)	ARCHAEOGLOBUS FULGIDUS	PIWI
2	C, E (P, R)	5'-R(*UP*UP*CP*GP*AP*CP*GP*CP)-3'	polymer	8	2502.5	2
3	D, F (Q, S)	5'-R(*GP*UP*CP*GP*AP*AP*UP*UP)-3'	polymer	8	2527.5	2
4	G, H (A, B)	MANGANESE (II) ION	non-polymer		54.9	2	Chemie (MN)
5	I, J, K, L, M... (A, B, P, Q, R...)	water	water		18.0	509	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	108665.0
Non-Polymers*	Number of molecules	2
	Total formula weight	109.9
All*	Total formula weight	108774.9

*Water molecules are not included.