3GVN

The 1.2 Angstroem crystal structure of an E.coli tRNASer acceptor stem microhelix reveals two magnesium binding sites

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	5'-R(*GP*GP*UP*GP*AP*GP*G)-3'	polymer	7	2316.4	1			tRNASer acceptor stem microhelix (RS-1661)
2	B (B)	5'-R(*CP*CP*UP*CP*AP*CP*C)-3'	polymer	7	2116.3	1			tRNASer acceptor stem microhelix (RS-1661)
3	C, D (A)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
4	E, F (A, B)	water	water		18.0	97	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	4432.8
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	4481.4

*Water molecules are not included.