4XLN

Crystal structure of T. aquaticus transcription initiation complex containing bubble promoter and RNA

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, G, H	DNA-directed RNA polymerase subunit alpha	polymer	314	34830.9	4	UniProt (Q9KWU8) Pfam (PF01193) Pfam (PF01000) Pfam (PF03118) In PDB	Thermus aquaticus	RNAP subunit alpha,RNA polymerase subunit alpha,Transcriptase subunit alpha
2	C, I	DNA-directed RNA polymerase subunit beta	polymer	1119	124930.0	2	UniProt (Q9KWU7) Pfam (PF04563) Pfam (PF04561) Pfam (PF04565) Pfam (PF10385) Pfam (PF00562) Pfam (PF04560) In PDB	Thermus aquaticus	RNAP subunit beta,RNA polymerase subunit beta,Transcriptase subunit beta
3	D, J	DNA-directed RNA polymerase subunit beta'	polymer	1524	171187.5	2	UniProt (Q9KWU6) Pfam (PF04997) Pfam (PF21668) Pfam (PF00623) Pfam (PF04983) Pfam (PF05000) Pfam (PF04998) In PDB	Thermus aquaticus	RNAP subunit beta',RNA polymerase subunit beta',Transcriptase subunit beta'
4	E, K	DNA-directed RNA polymerase subunit omega	polymer	99	11642.4	2	UniProt (Q9EVV4) Pfam (PF01192) In PDB	Thermus aquaticus	RNAP omega subunit,RNA polymerase omega subunit,Transcriptase subunit omega
5	F, L	RNA polymerase sigma factor SigA	polymer	347	39864.7	2	UniProt (Q9EZJ8) Pfam (PF00140) Pfam (PF04542) Pfam (PF04539) Pfam (PF04545) In PDB	Thermus aquaticus
6	O, R	DNA (48-MER)	polymer	48	14878.6	2		synthetic construct
7	P, S	DNA (48-MER)	polymer	48	14831.5	2		synthetic construct
8	Q, T	RNA (5'-D(P*UP*CP*GP*A)-3')	polymer	4	1240.8	2		synthetic construct
9	D, J	ZINC ION	non-polymer		65.4	4	Chemie (ZN)
10	D, J	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)

Contents of the asymmetric unit

Polymers	Number of chains	18
	Total formula weight	896474.8
Non-Polymers*	Number of molecules	6
	Total formula weight	310.2
All*	Total formula weight	896785.0

*Water molecules are not included.