4HU7 image
Deposition Date 2012-11-02
Release Date 2013-05-29
Last Version Date 2024-11-20
Entry Detail
PDB ID:
4HU7
Keywords:
OXIDOREDUCTASE
Title:
E. coli thioredoxin variant with Pro76 as single proline residue
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 83333)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.40 Å
R-Value Free:
0.19
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 1 21 1
4HU7 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Thioredoxin-1
Gene (Uniprot):trxA
Mutations:P34A, P40A, P64A, P68A
Chain IDs:A, B
Chain Length:108
Number of Molecules:2
Biological Source:Escherichia coli
UniProt ID:P0AA25 Pfam ID:PF00085
Ligand Molecules
CU
NA
Primary Citation
(4R)- and (4S)-Fluoroproline in the Conserved cis-Prolyl Peptide Bond of the Thioredoxin Fold: Tertiary Structure Context Dictates Ring Puckering.
Chembiochem 14 1053 1057 (2013)
PMID: 23712956 DOI: 10.1002/cbic.201300178

Abstact

Fine-tuning protein stability: The non-natural amino acids (2S,4R)- and (2S,4S)-fluoroproline modulate protein stability by biasing the proline ring pucker and the cis/trans equilibrium of prolyl peptide bonds. We incorporated both fluoroproline stereoisomers at the invariant cis-proline residue of the thioredoxin fold. The results show that tertiary structure context overrules the conformational preferences of fluoroprolines.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
4HUA
4HU9