7UXY

Isoreticular, interpenetrating co-crystal of protein variant Replication Initiator Protein REPE54 (L53G,Q54G,E55G) and symmetrical expanded duplex (31mer) containing the cognate REPE54 sequence and an additional G-C rich sequence.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	DNA (5'-D(A*CP*CP*CP*GP*GP*AP*CP*CP*TP*GP*TP*P*GP*AP*CP*AP*AP*AP*TP*TP*GP*CP*CP*CP*TP*CP*AP*GP*AP*CP*GP*G)-3')	polymer	32	9796.3	1		Escherichia coli
2	B	DNA (5'-D(A*GP*CP*CP*GP*TP*CP*TP*GP*AP*GP*GP*P*GP*CP*AP*AP*TP*TP*TP*GP*TP*CP*AP*CP*AP*GP*GP*TP*CP*CP*GP*G)-3')	polymer	32	9898.4	1		Escherichia coli
3	C	Replication initiation protein	polymer	263	30549.8	1	UniProt (P03856) Pfam (PF01051) Pfam (PF21205) In PDB	Escherichia coli K-12	Protein E,Protein rep,Protein F4
4	A, B, C	MAGNESIUM ION	non-polymer		24.3	8	Chemie (MG)
5		water	water		18.0	33	Chemie (HOH)

Sequence modifications

C: 1 - 251 (UniProt: P03856)

PDB	External Database	Details
Met -11	-	initiating methionine
Arg -10	-	expression tag
Gly -9	-	expression tag
Ser -8	-	expression tag
His -7	-	expression tag
His -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
Gly -1	-	expression tag
Ser 0	-	expression tag
Gly 53	Leu 53	engineered mutation
Gly 54	Gln 54	engineered mutation
Gly 55	Glu 55	engineered mutation
Pro 118	Arg 118	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	50244.5
Non-Polymers*	Number of molecules	8
	Total formula weight	194.4
All*	Total formula weight	50438.9

*Water molecules are not included.