4ZC0

Structure of a dodecameric bacterial helicase

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 (A, B, C, D)	Replicative DNA helicase	polymer	521	59590.6	4	UniProt (O25916) Pfam (PF00772) Pfam (PF03796)	Helicobacter pylori
2	E (B)	HEXATANTALUM DODECABROMIDE	non-polymer		2044.5	1	Chemie (TBR)

Sequence modifications

A, B, C, D: 1 - 488 (UniProt: O25916)

PDB	External Database	Details
Met -32	-	initiating methionine
His -31	-	expression tag
His -30	-	expression tag
His -29	-	expression tag
His -28	-	expression tag
His -27	-	expression tag
His -26	-	expression tag
Gly -25	-	expression tag
Lys -24	-	expression tag
Pro -23	-	expression tag
Ile -22	-	expression tag
Pro -21	-	expression tag
Asn -20	-	expression tag
Pro -19	-	expression tag
Leu -18	-	expression tag
Leu -17	-	expression tag
Gly -16	-	expression tag
Leu -15	-	expression tag
Asp -14	-	expression tag
Ser -13	-	expression tag
Thr -12	-	expression tag
Glu -11	-	expression tag
Asn -10	-	expression tag
Leu -9	-	expression tag
Tyr -8	-	expression tag
Phe -7	-	expression tag
Gln -6	-	expression tag
Gly -5	-	expression tag
Ile -4	-	expression tag
Asp -3	-	expression tag
Pro -2	-	expression tag
Phe -1	-	expression tag
Thr 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	238362.4
Non-Polymers*	Number of molecules	1
	Total formula weight	2044.5
All*	Total formula weight	240407.0

*Water molecules are not included.