6P1A

Transcription antitermination factor Q21 in complex with Q21-binding-element DNA

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 (A, B, C)	Q protein	polymer	162	18668.8	3	UniProt (Q9XJQ6) Pfam (PF06530)	Phage 21	Transcription antitermination factor Q21
2	D, F (D, F)	DNA (5'-D(P*CP*TP*CP*AP*TP*TP*GP*AP*GP*CP*AP*AP*AP*TP*GP*AP*GP*CP*AP*AP*G)-3')	polymer	21	6480.2	2		Phage 21	Q21-binding element DNA, nontemplate strand
3	E, G (E, G)	DNA (5'-D(*CP*TP*TP*GP*CP*TP*CP*AP*TP*TP*TP*GP*CP*TP*CP*AP*AP*TP*GP*AP*G)-3')	polymer	21	6404.1	2		Phage 21	Q21-binding element DNA, template strand
4	H, I, J (A, B)	1,2-ETHANEDIOL	non-polymer		62.1	3	Chemie (EDO)
5	K, L (B, C)	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)

Sequence modifications

A, B, C: 2 - 162 (UniProt: Q9XJQ6)

PDB	External Database	Details
Ser 1	-	expression tag
Gly 24	-	insertion
Trp 26	His 25	conflict
Val 27	Gly 26	conflict
Tyr 28	Leu 27	conflict
Val 47	Ile 46	conflict

Contents of the asymmetric unit

Polymers	Number of chains	7
	Total formula weight	81775.1
Non-Polymers*	Number of molecules	5
	Total formula weight	257.1
All*	Total formula weight	82032.2

*Water molecules are not included.