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Cryo-EM structure of a short prokaryotic Argonaute system from archaeon Suldolobus islandicus

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Piwi domain-containing protein	polymer	459	52741.4	1	UniProt (C4KI01) Pfam (PF02171)	Saccharolobus islandicus M.16.4
2	B (B)	SiAgo-associated protein1, SiAga1	polymer	243	29133.6	1	UniProt (C4KI00)	Saccharolobus islandicus M.16.4
3	C (D)	RNA (5'-R(P*UP*CP*AP*AP*AP*GP*CP*UP*UP*AP*GP*AP*UP*AP*CP*CP*CP*UP*GP*GP*A)-3')	polymer	21	6697.0	1		Saccharolobus islandicus M.16.4
4	D (E)	DNA (5'-D(*CP*CP*TP*CP*CP*AP*GP*GP*GP*TP*AP*TP*CP*TP*AP*AP*GP*CP*TP*TP*TP*GP*AP*A)-3')	polymer	24	7344.8	1		Saccharolobus islandicus M.16.4
5	E (A)	MAGNESIUM ION	non-polymer		24.3	1	Chemie (MG)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	95916.8
Non-Polymers*	Number of molecules	1
	Total formula weight	24.3
All*	Total formula weight	95941.1

*Water molecules are not included.