1G2I

CRYSTAL STRUCTURE OF A NOVEL INTRACELLULAR PROTEASE FROM PYROCOCCUS HORIKOSHII AT 2 A RESOLUTION

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	PROTEASE I	polymer	166	18838.0	3	UniProt (O59413) Pfam (PF01965) In PDB	Pyrococcus horikoshii
2	B	SULFATE ION	non-polymer		96.1	1	Chemie (SO4)
3		water	water		18.0	277	Chemie (HOH)

Sequence modifications

A, B, C: 1 - 166 (UniProt: O59413)

PDB	External Database	Details
Mse 1	Met 1	modified residue
Mse 89	Met 89	modified residue
Mse 127	Met 127	modified residue
Mse 158	Met 158	modified residue

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	56514.0
Non-Polymers*	Number of molecules	1
	Total formula weight	96.1
All*	Total formula weight	56610.1

*Water molecules are not included.