ISDA: 2QEL

Deposition Date 2007-06-26

Release Date 2007-09-04

Last Version Date 2023-08-30

Entry Detail

PDB ID:

2QEL

Keywords:

TRANSPORT PROTEIN

Title:

Crystal structure of the highly amyloidogenic transthyretin mutant TTR G53S/E54D/L55S- heated protein

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli BL21(DE3)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.29 Å

R-Value Free:

0.28

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 32 2 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Transthyretin
Gene (Uniprot):TTR
Mutagens:G53S,E54D,L55S
Chain IDs:A, B, C, D
Chain Length:127
Number of Molecules:4
Biological Source:Homo sapiens

UniProt ID:P02766 Pfam ID:PF00576

Primary Citation

Heating of proteins as a means of improving crystallization: a successful case study on a highly amyloidogenic triple mutant of human transthyretin

Karlsson, A, Sauer-Eriksson, A.E, Eneqvist, T, Andersson, K, Olofsson, A, Lundgren, E, Sauer-Eriksson, A.E, Hornberg, A, Eneqvist, T, Olofsson, A, Lundgren, E, Sauer-Eriksson, A.E.Show

Acta Crystallogr.,Sect.F 63 695 700 (2007)

PMID: 17671371 DOI: 10.1107/S1744309107033957

Abstact

The use of high temperatures in the purification procedures of heat-stable proteins is a well established technique. Recently, rapid pre-heat treatment of protein samples prior to crystallization trials was described as a final polishing step to improve the diffraction properties of crystals [Pusey et al. (2005), Prog. Biophys. Mol. Biol. 88, 359-386]. The present study demonstrates that extended high-temperature incubation (328 K for 48 h) of the highly amyloidogenic transthyretin mutant TTR G53S/E54D/L55S successfully removes heterogeneities and allows the reproducible growth of well diffracting crystals. Heat treatment might be applied as an optimization method to other cases in which the protein/biomolecule fails to form diffracting crystals.

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