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@ARTICLE{Strucksberg:60251,
author = {Strucksberg, K.H. and Rosenkranz, T. and Fitter, J.},
title = {{R}eversible and irreversible unfolding of multi-domain
proteins},
journal = {Biochimica et biophysica acta / Proteins and proteomics},
volume = {1774},
issn = {1570-9639},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-60251},
pages = {1501 - 1603},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {In contrast to single-domain proteins unfolding of larger
multi-domain proteins is often irreversible. In a
comparative case study on three different multi-domain
proteins (phosphoglycerate kinase: PGK and two homologous
alpha-amylases: TAKA and BLA) we investigated properties of
unfolded states and their ability to fold back into the
native state. For this purpose guanidine hydrochloride,
alkaline pH, and thermal unfolded states were characterized.
Structural alterations upon unfolding and refolding
transitions were monitored using fluorescence and CD
spectroscopy. Static and dynamic light scattering was
employed to follow aggregation processes. Furthermore,
proper refolding was also investigated by enzyme activity
measurements. While for PGK at least partial reversible
unfolding transitions were observed in most cases, we found
reversible unfolding for TAKA in the case of alkaline pH and
GndHCl induced unfolding. BLA exhibits reversible unfolding
only under conditions with high concentrations of protecting
osmolytes (glycerol), indicating that aggregation of the
unfolded state is the main obstacle to achieve proper
refolding for this protein. Structural properties, such as
number and size of domains, secondary structure contents and
compositions within domains, and domain topology were
analyzed and considered in the interpretation of differences
in refolding behavior of the investigated proteins.},
keywords = {Aspergillus oryzae: enzymology / Bacillus: enzymology /
Buffers / Glycerol: pharmacology / Guanidine: pharmacology /
Hydrogen-Ion Concentration / Models, Molecular / Osmolar
Concentration / Phosphoglycerate Kinase: chemistry / Protein
Denaturation: drug effects / Protein Folding / Protein
Structure, Tertiary: drug effects / Protein Structure,
Tertiary: physiology / Temperature / Transition Temperature
/ alpha-Amylases: chemistry / Buffers (NLM Chemicals) /
Guanidine (NLM Chemicals) / Glycerol (NLM Chemicals) /
Phosphoglycerate Kinase (NLM Chemicals) / alpha-Amylases
(NLM Chemicals) / J (WoSType)},
cin = {INB-2},
ddc = {570},
cid = {I:(DE-Juel1)VDB805},
pnm = {Funktion und Dysfunktion des Nervensystems},
pid = {G:(DE-Juel1)FUEK409},
shelfmark = {Biochemistry $\&$ Molecular Biology / Biophysics},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:17964867},
UT = {WOS:000252238600012},
doi = {10.1016/j.bbapap.2007.09.005},
url = {https://juser.fz-juelich.de/record/60251},
}