7UIM

CryoEM Structure of an Group II Intron Retroelement (apo-complex)

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (B)	E.r IIC Intron	polymer	638	206779.9	1		[Eubacterium] rectale
2	B (D)	Group II intron reverse transcriptase/maturase	polymer	427	49083.9	1	UniProt (A0A173ZME3) Pfam (PF00078) Pfam (PF08388)	[Eubacterium] rectale	Group II intron-encoded protein ltrA
3	C, D, E, F, G... (B)	MAGNESIUM ION	non-polymer		24.3	13	Chemie (MG)
4	P, Q (B)	AMMONIUM ION	non-polymer		18.0	2	Chemie (NH4)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	255863.8
Non-Polymers*	Number of molecules	15
	Total formula weight	352.0
All*	Total formula weight	256215.8

*Water molecules are not included.