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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Genet+Genomics
2016 ; 43
(6
): 393-404
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Filamentation of Metabolic Enzymes in Saccharomyces cerevisiae
#MMPMID27312010
Shen QJ
; Kassim H
; Huang Y
; Li H
; Zhang J
; Li G
; Wang PY
; Yan J
; Ye F
; Liu JL
J Genet Genomics
2016[Jun]; 43
(6
): 393-404
PMID27312010
show ga
Compartmentation via filamentation has recently emerged as a novel mechanism for
metabolic regulation. In order to identify filament-forming metabolic enzymes
systematically, we performed a genome-wide screening of all strains available
from an open reading frame-GFP collection in Saccharomyces cerevisiae. We
discovered nine novel filament-forming proteins and also confirmed those
identified previously. From the 4159 strains, we found 23 proteins, mostly
metabolic enzymes, which are capable of forming filaments in vivo. In silico
protein-protein interaction analysis suggests that these filament-forming
proteins can be clustered into several groups, including translational initiation
machinery and glucose and nitrogen metabolic pathways. Using glutamine-utilising
enzymes as examples, we found that the culture conditions affect the occurrence
and length of the metabolic filaments. Furthermore, we found that two CTP
synthases (Ura7p and Ura8p) and two asparagine synthetases (Asn1p and Asn2p) form
filaments both in the cytoplasm and in the nucleus. Live imaging analyses suggest
that metabolic filaments undergo sub-diffusion. Taken together, our genome-wide
screening identifies additional filament-forming proteins in S. cerevisiae and
suggests that filamentation of metabolic enzymes is more general than currently
appreciated.