6IVU

Solution structure of the Sigma-anti-sigma factor complex RsgI1N-SigI1C from Clostridium thermocellum

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Anti-sigma-I factor RsgI1	polymer	53	6170.2	1	UniProt (A3DBH1) Pfam (PF12791) In PDB	Hungateiclostridium thermocellum ATCC 27405 (Ruminiclostridium thermocellum)
2	B	RNA polymerase sigma factor SigI1	polymer	118	14226.7	1	UniProt (A3DBH0) In PDB	Clostridium thermocellum (Hungateiclostridium thermocellum ATCC 27405)

Sequence modifications

A: 1 - 52 (UniProt: A3DBH1)

PDB	External Database	Details
Ser 0	-	expression tag

B: 141 - 249 (UniProt: A3DBH0)

PDB	External Database	Details
Met 140	-	initiating methionine
Leu 250	-	expression tag
Glu 251	-	expression tag
His 252	-	expression tag
His 253	-	expression tag
His 254	-	expression tag
His 255	-	expression tag
His 256	-	expression tag
His 257	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	20396.8
All*	Total formula weight	20396.8

*Water molecules are not included.