4KI2

Crystallographic analysis of an RNA-polymerase sigma-subunit fragment complexed with -10 promoter element ssDNA

Replaces:  4GOR

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	D, E, F, G	DNA (5'-D(*TP*GP*TP*AP*CP*AP*AP*TP*GP*GP*G)-3')	polymer	11	3413.2	4
2	A, B	RNA polymerase sigma factor	polymer	245	28038.4	2	UniProt (Q9EZJ8) Pfam (PF00140) Pfam (PF04542) Pfam (PF04539) In PDB	Thermus aquaticus
3	D, G	POTASSIUM ION	non-polymer		39.1	5	Chemie (K)

Sequence modifications

A, B: 92 - 332 (UniProt: Q9EZJ8)

PDB	External Database	Details
Gly 88	-	expression tag
Pro 89	-	expression tag
His 90	-	expression tag
Met 91	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	69729.8
Non-Polymers*	Number of molecules	5
	Total formula weight	195.5
All*	Total formula weight	69925.3

*Water molecules are not included.