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Table 1 Biomarker metabolites identified in each inhibitor-treated group

From: Proteomic and metabolomic analysis of the cellular biomarkers related to inhibitors tolerance in Zymomonas mobilis ZM4

Metabolites

VIP values

FA

AA

F

H

P

C

Glucose

5.41#

5.70#

\

\

\

\

Oxoproline

5.31

3.50

5.10

4.57

2.40#

2.42#

Glycerol

4.66

4.13

3.21

\

2.20#

1.78#

Alanine

3.88

\

\

\

\

3.91#

Gluconic lactone

2.77#

\

1.81

\

4.30

3.25#

d-Glyceric acid

2.52

2.30

1.64

1.60

2.34

\

Leucine

2.29

\

1.92#

\

\

3.11#

3-Hydroxypropionic acid

1.94

1.76

\

\

\

\

Lysine

1.67

\

1.01

\

\

\

2-hydroxypyridine

1.59

1.19

1.29

\

1.02

\

Phenylalanine

1.53

1.20

1.09

1.26

\

\

Inosine

1.37

1.61

1.85#

\

\

\

Trehalose

1.37

\

1.50#

\

1.02#

2.32#

Lactic acid

1.15

\

 

\

1.19

\

Ribose

1.13

1.32

1.21

1.16

\

\

Gluconic acid

1.11#

4.95#

3.86#

6.86#

6.01

6.70#

Tyrosine

1.05

\

\

\

\

\

l-Allothreonine

1.03

1.30#

1.57

\

\

3.25#

O-Phosphoserine

1.02#

\

\

\

\

\

Phosphate

\

2.58

3.36

2.81

\

\

Isoleucine

\

2.10#

1.99#

2.31#

2.34#

2.36#

Linoleic acid methyl ester

\

2.04#

3.21#

2.22#

2.14

1.33#

Glycine

\

1.69#

1.65#

1.75#

1.93#

1.87#

Stearic acid

\

1.53#

1.89#

\

\

1.33#

Valine

\

1.52#

4.10#

2.35#

2.35#

2.19#

Proline

\

1.49#

1.58#

1.50#

1.95#

1.15#

Oleic acid

\

1.43#

1.10#

\

\

1.29#

Serine

\

1.43#

1.04#

1.15#

2.30#

2.10#

Succinic acid

\

1.17#

1.84#

1.43#

1.25#

1.32#

Tyrosine

\

1.02

\

\

\

\

Dihydroxyacetone

\

\

1.52#

2.69#

5.72#

1.35#

Aspartic acid

\

\

1.29

1.16

1.50

\

Palmitic acid

\

\

1.00

\

\

\

1,2-Cyclohexanedione

\

\

\

4.56#

\

2.11#

  1. VIP variable importance to projection, obtained by OPLS-DA analysis. FA cells treated by formic acid, AA cells treated by acetic acid, F cells treated by furfural, H cells treated by 5-HMF, P cells treated by phenol, C cells treated by combined inhibitors. Symbol “\” denotes the metabolite is not identified as a biomarker in the relevant group. Superscript symbol “#” denotes the metabolite is up-regulated. Metabolite without symbol denotes it is down-regulated