ISDA: 6AG5

Deposition Date 2018-08-09

Release Date 2019-08-14

Last Version Date 2023-11-22

Entry Detail

PDB ID:

6AG5

Keywords:

TRANSFERASE

Title:

Crystal structure of Ard1 N-terminal acetyltransferase E88H/H127E mutant from Sulfolobus solfataricus

Biological Source:

Source Organism:

Sulfolobus solfataricus P2 (Taxon ID: 273057)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.32 Å

R-Value Free:

0.24

R-Value Work:

0.16

R-Value Observed:

0.16

Space Group:

P 21 21 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:N-alpha-acetyltransferase
Gene (Uniprot):ard1
Mutagens:H88E, E127H
Chain IDs:A
Chain Length:175
Number of Molecules:1
Biological Source:Sulfolobus solfataricus P2

UniProt ID:Q980R9 Pfam ID:PF00583 EC:2.3.1.255

Ligand Molecules

ACO

Primary Citation

Adaptation of thermophilic acetyltransferase to a water-mediated catalytic mechanism.

Chang, Y.Y, Hagawa, S, Hsu, C.H, Chang, Y.Y, Hsu, C.H.Show

Chem.Commun.(Camb.) 56 10537 10540 (2020)

PMID: 32780067 DOI: 10.1039/d0cc04305b

Abstact

The common mechanism of N-acetyltransferases (NATs) is a water-mediated catalysis, which is not conducive to thermophilic acetyltransferases. The crystal structure of SsArd1 shows an ordered catalytic water molecule in a trap formed by the residues H88 and E127. Structure-guided mutagenesis, kinetic studies and MD simulation indicated that the turnover rates of H88A, E127A and H88A/E127A mutants were low, but that of the H88E/E127H mutant could be restored to the level of the wild type.

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Primary Citation of related structures