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@ARTICLE{FauziahMaruf:904478,
author = {Fauziah Ma’ruf, Ilma and Sasaki, Yuka and Kerbs,
Anastasia and Nießer, Jochen and Sato, Yu and Taniguchi,
Hironori and Okano, Kenji and Kitani, Shigeru and
Restiawaty, Elvi and Akhmaloka and Honda, Kohsuke},
title = {{H}eterologous gene expression and characterization of two
serine hydroxymethyltransferases from {T}hermoplasma
acidophilum},
journal = {Extremophiles},
volume = {25},
number = {4},
issn = {1431-0651},
address = {Tokyo},
publisher = {Springer},
reportid = {FZJ-2021-06048},
pages = {393 - 402},
year = {2021},
abstract = {Serine hydroxymethyltransferase (SHMT) and threonine
aldolase are classified as fold type I
pyridoxal-5’-phosphate-dependent enzymes and engaged in
glycine biosynthesis from serine and threonine,
respectively. The acidothermophilic archaeon Thermoplasma
acidophilum possesses two distinct SHMT genes, while there
is no gene encoding threonine aldolase in its genome. In the
present study, the two SHMT genes (Ta0811 and Ta1509) were
heterologously expressed in Escherichia coli and
Thermococcus kodakarensis, respectively, and biochemical
properties of their products were investigated. Ta1509
protein exhibited dual activities to catalyze
tetrahydrofolate (THF)-dependent serine cleavage and
THF-independent threonine cleavage, similar to other SHMTs
reported to date. In contrast, the Ta0811 protein lacks
amino acid residues involved in the THF-binding motif and
catalyzes only the THF-independent cleavage of threonine.
Kinetic analysis revealed that the threonine-cleavage
activity of the Ta0811 protein was 3.5 times higher than the
serine-cleavage activity of Ta1509 protein. In addition,
mRNA expression of Ta0811 gene in T. acidophilum was
approximately 20 times more abundant than that of Ta1509.
These observations suggest that retroaldol cleavage of
threonine, mediated by the Ta0811 protein, has a major role
in glycine biosynthesis in T. acidophilum.},
cin = {IBG-1},
ddc = {570},
cid = {I:(DE-Juel1)IBG-1-20101118},
pnm = {2172 - Utilization of renewable carbon and energy sources
and engineering of ecosystem functions (POF4-217)},
pid = {G:(DE-HGF)POF4-2172},
typ = {PUB:(DE-HGF)16},
pubmed = {34196829},
UT = {WOS:000668834700002},
doi = {10.1007/s00792-021-01238-9},
url = {https://juser.fz-juelich.de/record/904478},
}