4YOY

Crystal structure of a trimeric exonuclease PhoExo I from Pyrococcus horikoshii OT3 in complex with poly-dT and Mg2+ ion

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C, E	3-5 exonuclease PhoExo I	polymer	233	26219.3	3	UniProt (A0A060P168) Pfam (PF13680) In PDB	Pyrococcus horikoshii
2	B, D, F	5'-D(*TP*TP*TP*TP*TP*TP*T)-3'	polymer	7	2084.4	3		synthetic construct
3	C, E	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
4		water	water		18.0	236	Chemie (HOH)

Sequence modifications

A, C, E: 1 - 229 (UniProt: A0A060P168)

PDB	External Database	Details
Asn 80	Asp 80	engineered mutation
His 230	-	expression tag
His 231	-	expression tag
His 232	-	expression tag
His 233	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	84911.0
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	84959.6

*Water molecules are not included.