1XGN

METHIONINE AMINOPEPTIDASE FROM HYPERTHERMOPHILE PYROCOCCUS FURIOSUS

DOI: 10.2210/pdb1XGN/pdb

Classification: AMINOPEPTIDASE
Organism(s): Pyrococcus furiosus
Mutation(s): No

Deposited: 1997-11-17 Released: 1998-02-25
Deposition Author(s): Tahirov, T.H., Tsukihara, T.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.90 Å
R-Value Free: 0.226
R-Value Work: 0.156
R-Value Observed: 0.156

wwPDB Validation3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Crystal structure of methionine aminopeptidase from hyperthermophile, Pyrococcus furiosus.

Tahirov, T.H., Oki, H., Tsukihara, T., Ogasahara, K., Yutani, K., Ogata, K., Izu, Y., Tsunasawa, S., Kato, I.

(1998) J Mol Biol 284: 101-124

PubMed: 9811545 Search on PubMed
DOI: 10.1006/jmbi.1998.2146
Structures With Same Primary Citation

PubMed Abstract:

The structure of methionine aminopeptidase from hyperthermophile Pyrococcus furiosus (PfMAP) with an optimal growth temperature of 100 degreesC was determined by the multiple isomorphous replacement method and refined in three different crystal forms, one monoclinic and two hexagonal, at resolutions of 2.8, 2.9, and 3.5 A. The resolution of the monoclinic crystal form was extended to 1.75 A by water-mediated transformation to a low-humidity form, and the obtained diffraction data used for high-resolution structure refinement. This is the first description of a eukaryotic type methionine aminopeptidase structure. The PfMAP molecule is composed of two domains, a catalytic domain and an insertion domain, connected via two antiparallel beta-strands. The catalytic domain, which possesses an internal 2-fold symmetry and contains two cobalt ions in the active site, resembles the structure of a prokaryotic type MAP from Escherichia coli (EcMAP), while the structure of the insertion domain containing three helices has a novel fold and accounts for a major difference between the eukaryotic and prokaryotic types of methionine aminopeptidase. Analysis of the PfMAP structure in comparison with EcMAP and other mesophile proteins reveals several factors which may contribute to the hyperthermostability of PfMAP: (1) a significantly high number of hydrogen bonds and ion-pairs between side-chains of oppositely charged residues involved in the stabilization of helices; (2) an increased number of hydrogen bonds between the positively charged side-chain and neutral oxygen; (3) a larger number of buried water molecules involved in crosslinking the backbone atoms of sequentially separate segments; (4) stabilization of two antiparallel beta-strands connecting the two domains of the molecule by proline residues; (5) shortening of N and C-terminal tails and stabilization of the loop c3E by deletion of three residues.

Related Citations:

Crystallization and Preliminary X-Ray Analysis of Methionine Aminopeptidase from the Hyperthermophilic Bacterium Pyrococcus Furiosus
Tahirov, T.H., Oki, H., Tsukihara, T., Ogasahara, K., Izu, Y., Tsunasawa, S., Kato, I., Yutani, K.
(1997) Acta Crystallogr D Biol Crystallogr 53: 798

Organizational Affiliation:

Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565, Japan.

Macromolecules

Find similar proteins by: Sequence | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
METHIONINE AMINOPEPTIDASE	A, B	295	Pyrococcus furiosus	Mutation(s): 0 EC: 3.4.11.18
Find proteins for P56218 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1)) Go to UniProtKB: P56218
Protein Feature View
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CO Query on CO Download CCD File	A, B	COBALT (II) ION Co XLJKHNWPARRRJB-UHFFFAOYSA-N		Ligand Interaction