1H38

Structure of a T7 RNA polymerase elongation complex at 2.9A resolution

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 (A, B, C, D)	DNA-DIRECTED RNA POLYMERASE	polymer	883	98984.2	4	UniProt (P00573) Pfam (PF14700) Pfam (PF00940)	BACTERIOPHAGE T7
2	E, H, K, N (E, H, K, N)	5'-D(*GP*GP*GP*AP*AP*TP*CP*GP*AP*CP *AP*TP*CP*GP*CP*CP*GP*C)-3'	polymer	18	5526.6	4		BACTERIOPHAGE T7
3	F, I, L, O (F, I, L, O)	5'-R(*AP*AP*CP*UP*GP*CP*GP*GP*CP*GP *AP*U)-3'	polymer	12	3851.4	4		BACTERIOPHAGE T7
4	G, J, M, P (G, J, M, P)	5'-D(*GP*TP*CP*GP*AP*TP*TP*CP*CP*CP)-3'	polymer	10	2996.0	4		BACTERIOPHAGE T7
5	AA, BA, CA, DA, EA... (K, L, M, N, O...)	water	water		18.0	1162	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	16
	Total formula weight	445432.5
All*	Total formula weight	445432.5

*Water molecules are not included.