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@ARTICLE{Dick:281037,
author = {Dick, Markus and Weiergräber, Oliver H. and Classen,
Thomas and Bisterfeld, Carolin and Bramski, Julia and
Gohlke, Holger and Pietruszka, Jörg},
title = {{T}rading off stability against activity in extremophilic
aldolases},
journal = {Scientific reports},
volume = {6},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2016-00748},
pages = {17908 -},
year = {2016},
abstract = {Understanding enzyme stability and activity in
extremophilic organisms is of great biotechnological
interest, but many questions are still unsolved. Using
2-deoxy-D-ribose-5-phosphate aldolase (DERA) as model
enzyme, we have evaluated structural and functional
characteristics of different orthologs from psychrophilic,
mesophilic and hyperthermophilic organisms. We present the
first crystal structures of psychrophilic DERAs, revealing a
dimeric organization resembling their mesophilic but not
their thermophilic counterparts. Conversion into monomeric
proteins showed that the native dimer interface contributes
to stability only in the hyperthermophilic enzymes.
Nevertheless, introduction of a disulfide bridge in the
interface of a psychrophilic DERA did confer increased
thermostability, suggesting a strategy for rational design
of more durable enzyme variants. Constraint network analysis
revealed particularly sparse interactions between the
substrate pocket and its surrounding α-helices in
psychrophilic DERAs, which indicates that a more flexible
active center underlies their high turnover numbers.},
cin = {IBOC / IBG-1 / ICS-6},
ddc = {000},
cid = {I:(DE-Juel1)IBOC-20090406 / I:(DE-Juel1)IBG-1-20101118 /
I:(DE-Juel1)ICS-6-20110106},
pnm = {581 - Biotechnology (POF3-581)},
pid = {G:(DE-HGF)POF3-581},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000368330900001},
pubmed = {pmid:26783049},
doi = {10.1038/srep17908},
url = {https://juser.fz-juelich.de/record/281037},
}