3IL2

Crystal structure of a Rex-family repressor R90D mutant/DNA complex from Thermus aquaticus

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Redox-sensing transcriptional repressor rex	polymer	207	22782.1	2	UniProt (Q72I39) Pfam (PF06971) Pfam (PF02629)	Thermus thermophilus HB27
2	C, D (C, D)	Rex operator DNA	polymer	22	7012.8	2
3	E, F, G, H (A, B, C, D)	water	water		18.0	122	Chemie (HOH)

Sequence modifications

A, B: 1 - 206 (UniProt: Q72I39)

PDB	External Database	Details
Gly 0	-	expression tag
Asp 90	Arg 90	engineered mutation

C, D: 1 - 22 (PDB: 3IL2)

PDB	External Database	Details
Bru 4	Dt 4	engineered mutation
Bru 6	Dt 6	engineered mutation
Bru 14	Dt 14	engineered mutation
Bru 15	Dt 15	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	59589.9
All*	Total formula weight	59589.9

*Water molecules are not included.