ISDA

Entry Detail

PDB ID:

1ZH6

Keywords:

LIGASE

Title:

Crystal Structure of p-acetylphenylalanine-tRNA synthetase in complex with p-acetylphenylalanine

Biological Source:

Source Organism:

Methanocaldococcus jannaschii

Host Organism:

Escherichia coli BL21(DE3)

PDB Version:

Deposition Date:

2005-04-22

Release Date:

2006-04-04

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Free:

0.27

R-Value Work:

0.20

R-Value Observed:

0.21

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Tyrosyl-tRNA synthetase
Mutations:Y32L,D158G,I159C,L162R
Chain IDs:A
Chain Length:314
Number of Molecules:1
Biological Source:Methanocaldococcus jannaschii

UniProt ID:Q57834 Pfam ID:PF00579 EC:6.1.1.1

Ligand Molecules

4AF

BME

Primary Citation

Structural characterization of a p-acetylphenylalanyl aminoacyl-tRNA synthetase.

Turner, J.M, Graziano, J, Spraggon, G, Schultz, P.G.Show

J.Am.Chem.Soc. 127 14976 14977 (2005)

PMID: 16248607 DOI: 10.1021/ja0549042

Abstact

It has been recently shown that orthogonal tRNA/aminoacyl-tRNA synthetase pairs can be evolved to allow genetic incorporation of unnatural amino acids into proteins in both prokaryotes and eukaryotes. Here we describe the crystal structure of an evolved aminoacyl-tRNA synthetase that charges the unnatural amino acid p-acetylphenylalanine. Molecular recognition is due to altered hydrogen bonding and packing interactions with bound substrate that result from changes in both side-chain and backbone conformation.

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Primary Citation of related structures