ISDA

Deposition Date 2012-11-02

Release Date 2013-05-29

Last Version Date 2024-11-20

Entry Detail

PDB ID:

4HU9

Keywords:

OXIDOREDUCTASE

Title:

E. coli thioredoxin variant with (4S)-FluoroPro76 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:

1.55 Å

R-Value Free:

0.21

R-Value Work:

0.17

R-Value Observed:

0.17

Space Group:

C 1 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Thioredoxin-1
Gene (Uniprot):trxA
Mutations:P34A, P40A, P64A, P68A
Chain IDs:A
Chain Length:108
Number of Molecules:1
Biological Source:Escherichia coli

UniProt ID:P0AA25 Pfam ID:PF00085

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
4FB	A	PRO	(4S)-4-FLUORO-L-PROLINE

Ligand Molecules

Primary Citation

(4R)- and (4S)-Fluoroproline in the Conserved cis-Prolyl Peptide Bond of the Thioredoxin Fold: Tertiary Structure Context Dictates Ring Puckering.

Rubini, M, Scharer, M.A, Capitani, G, Glockshuber, R.Show

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.

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Protein

Chemical

Disease

Primary Citation of related structures