ISDA: 1G2I

Deposition Date 2000-10-19

Release Date 2000-11-08

Last Version Date 2024-10-16

Entry Detail

PDB ID:

1G2I

Keywords:

HYDROLASE

Title:

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

Biological Source:

Source Organism(s):

Pyrococcus horikoshii (Taxon ID: 53953)

Expression System(s):

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Free:

0.2

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 41 21 2

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:PROTEASE I
Gene (Uniprot):PH1704
Chain IDs:A, B, C
Chain Length:166
Number of Molecules:3
Biological Source:Pyrococcus horikoshii

UniProt ID:O59413 Pfam ID:PF01965 EC:3.4.11.B7

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
MSE	A	MET	SELENOMETHIONINE

Ligand Molecules

SO4

Primary Citation

Crystal structure of an intracellular protease from Pyrococcus horikoshii at 2-A resolution.

Du, X, Choi, I.G, Kim, R, Wang, W, Jancarik, J, Yokota, H, Kim, S.-H.Show

Proc.Natl.Acad.Sci.USA 97 14079 14084 (2000)

PMID: 11114201 DOI: 10.1073/pnas.260503597

Abstact

The intracellular protease from Pyrococcus horikoshii (PH1704) and PfpI from Pyrococcus furiosus are members of a class of intracellular proteases that have no sequence homology to any other known protease family. We report the crystal structure of PH1704 at 2.0-A resolution. The protease is tentatively identified as a cysteine protease based on the presence of cysteine (residue 100) in a nucleophile elbow motif. In the crystal, PH1704 forms a hexameric ring structure, and the active sites are formed at the interfaces between three pairs of monomers.

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Primary Citation of related structures

Abstact

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