1TRR

TANDEM BINDING IN CRYSTALS OF A TRP REPRESSOR/OPERATOR HALF-SITE COMPLEX

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (C, F, I, L)	DNA (5'-D(*AP*GP*CP*GP*TP*AP*CP*TP*AP*GP*TP*AP*CP*GP*CP*T)-3')	polymer	16	4898.2	4
2	E, F, G, H, I... (A, B, D, E, G...)	PROTEIN (TRP REPRESSOR)	polymer	107	12239.9	8	UniProt (P0A881) Pfam (PF01371)	Escherichia coli
3	M, N, O, P, Q... (A, D, E, G, H...)	TRYPTOPHAN	non-polymer		204.2	8	Chemie (TRP)
4	AA, BA, CA, DA, EA... (D, E, G, H, J...)	water	water		18.0	192	Chemie (HOH)

Sequence modifications

A, B, D, E, G, H, J, K: 2 - 108 (UniProt: P0A881)

PDB	External Database	Details
Glu 17	Gln 16	conflict

Contents of the asymmetric unit

Polymers	Number of chains	12
	Total formula weight	117512.1
Non-Polymers*	Number of molecules	8
	Total formula weight	1633.8
All*	Total formula weight	119145.9

*Water molecules are not included.