6FYQ image
Entry Detail
PDB ID:
6FYQ
Keywords:
TRANSFERASE
Title:
The crystal structure of a new transaminase from the marine bacterium Virgibacillus
Biological Source:
Source Organism:
Virgibacillus pantothenticus
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2018-03-12
Release Date:
2018-12-12
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.00 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 32 2 1
6FYQ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:amine transaminase
Chain IDs:A
Chain Length:484
Number of Molecules:1
Biological Source:Virgibacillus pantothenticus
UniProt ID:A0A4P1LYG1 Pfam ID:PF00202
Ligand Molecules
CL
EDO
PLP
Primary Citation
Strategic single point mutation yields a solvent- and salt-stable transaminase from Virgibacillus sp. in soluble form.
Sci Rep 8 16441 16441 (2018)
PMID: 30401905 DOI: 10.1038/s41598-018-34434-3

Abstact

A new transaminase (VbTA) was identified from the genome of the halotolerant marine bacterium Virgibacillus 21D. Following heterologous expression in Escherichia coli, it was located entirely in the insoluble fraction. After a single mutation, identified via sequence homology analyses, the VbTA T16F mutant was successfully expressed in soluble form and characterised. VbTA T16F showed high stability towards polar organic solvents and salt exposure, accepting mainly hydrophobic aromatic amine and carbonyl substrates. The 2.0 Å resolution crystal structure of VbTA T16F is here reported, and together with computational calculations, revealed that this mutation is crucial for correct dimerisation and thus correct folding, leading to soluble protein expression.

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Primary Citation of related structures
6FYQ