8CWR

Complex structure of WhiB3 and the SigmaAr4-RNAP Beta flap tip chimera in space group R3

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Redox- and pH-responsive transcriptional regulator WhiB3	polymer	90	10268.6	1	UniProt (P9WF41) Pfam (PF02467) In PDB	Mycobacterium tuberculosis
2	B	RNA polymerase sigma factor SigA,DNA-directed RNA polymerase subunit beta	polymer	112	12650.2	1	UniProt (P9WGI1) UniProt (P9WGY9) Pfam (PF04545) In PDB	Mycobacterium tuberculosis
3	A	IRON/SULFUR CLUSTER	non-polymer		351.6	1	Chemie (SF4)
4	A, B	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
5	B	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL	non-polymer		122.1	1	Chemie (TRS)
6	B	NICKEL (II) ION	non-polymer		58.7	3	Chemie (NI)
7		water	water		18.0	105	Chemie (HOH)

Sequence modifications

B: 446 - 528 (UniProt: P9WGI1)

PDB	External Database	Details
Met 438	-	initiating methionine
Ala 439	-	expression tag
His 440	-	expression tag
His 441	-	expression tag
His 442	-	expression tag
His 443	-	expression tag
His 444	-	expression tag
His 445	-	expression tag
Gly 529	-	linker
Ser 530	-	linker
Ser 531	-	linker
Gly 532	-	linker
Ser 533	-	linker
Gly 534	-	linker

B: 535 - 549 (UniProt: P9WGY9)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	22918.9
Non-Polymers*	Number of molecules	7
	Total formula weight	842.0
All*	Total formula weight	23760.9

*Water molecules are not included.