GapMind for catabolism of small carbon sources

 

D-maltose catabolism in Pseudomonas fluorescens FW300-N2E3

Best path

susB, gtsA, gtsB, gtsC, gtsD, glk

Also see fitness data for the top candidates

Rules

Overview: Maltose utilization in GapMind is based on the MetaCyc pathway via maltose phosphorylase (link), or a phosphotransferase system followed by 6-phospho-alphaglucosidase, or a phosphotransferase system followed by a phosphatase back to maltose followed by maltose phosphorylase, or hydrolysis by alpha-glucosidase after uptake, or periplasmic hydrolysis by alpha-glucosidase followed by glucose utilization.

89 steps (48 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
susB alpha-glucosidase (maltase) AO353_15985 AO353_22940
gtsA glucose ABC transporter, substrate-binding component (GtsA) AO353_03395
gtsB glucose ABC transporter, permease component 1 (GtsB) AO353_03390
gtsC glucose ABC transporter, permease component 2 (GtsC) AO353_03385 AO353_25125
gtsD glucose ABC transporter, ATPase component (GtsD) AO353_03380 AO353_25130
glk glucokinase AO353_03415
Alternative steps:
aglE maltose ABC transporter, substrate-binding component AglK
aglE' glucose ABC transporter, substrate-binding component (AglE)
aglF maltose ABC transporter, permease component 1 (AglF)
aglF' glucose ABC transporter, permease component 1 (AglF)
aglG maltose ABC transporter, permease component 2 (AglG) AO353_25125 AO353_03385
aglG' glucose ABC transporter, permease component 2 (AglG) AO353_03385
aglK maltose ABC transporter, ATPase component AglK AO353_25895 AO353_25130
aglK' glucose ABC transporter, ATPase component (AglK) AO353_25895 AO353_25130
bglF glucose PTS, enzyme II (BCA components, BglF) AO353_15980
crr glucose PTS, enzyme IIA AO353_15995 AO353_04460
cscB maltose permease
eda 2-keto-3-deoxygluconate 6-phosphate aldolase AO353_03350 AO353_01265
edd phosphogluconate dehydratase AO353_03420 AO353_08345
gadh1 gluconate 2-dehydrogenase flavoprotein subunit AO353_10795
gadh2 gluconate 2-dehydrogenase cytochrome c subunit AO353_10800 AO353_27065
gadh3 gluconate 2-dehydrogenase subunit 3 AO353_10790
gdh quinoprotein glucose dehydrogenase AO353_16045
glcS glucose ABC transporter, substrate-binding component (GlcS)
glcT glucose ABC transporter, permease component 1 (GlcT)
glcU glucose ABC transporter, permease component 2 (GlcU)
glcU' Glucose uptake protein GlcU
glcV glucose ABC transporter, ATPase component (GclV) AO353_07265 AO353_29310
gnl gluconolactonase AO353_23650
kguD 2-keto-6-phosphogluconate reductase AO353_04850 AO353_26885
kguK 2-ketogluconokinase AO353_26875
kguT 2-ketogluconate transporter AO353_26880 AO353_26910
MAL11 maltose permease
malA 6-phospho-alphaglucosidase
malAP maltose permease
malE maltose ABC transporter, substrate-binding component MalE
malE1 maltose ABC transporter, substrate-binding component (MalE1/MalE2)
malE_Aa maltose ABC transporter, substrate-binding component
malE_Ss maltose ABC transporter, substrate-binding component
malEF_Bb maltose ABC transporter, fused substrate-binding and permease component 1
malEIIA maltose phosphotransferase system, EII-A component (PtsG/YpqE/GamP) AO353_04465 AO353_15995
malEIICB maltose phosphotransferase system, EII-CB components curated:SwissProt::P54715 AO353_04465
malEIICBA maltose phosphotransferase system, EII-CBA components
malF maltose ABC transporter, permease component 1 (MalF)
malF1 maltose ABC transporter, permease component 1 (MalF1)
malF_Aa maltose ABC transporter, permease component 1 AO353_25120
malF_Sm maltose ABC transporter, permease component 1
malF_Ss maltose ABC transporter, permease component 1
malG maltose ABC transporter, permease component 2 (MalG) AO353_25125 AO353_25890
malG1 maltose ABC transporter, permease component 2 (MalG1/MalG2)
malG_Aa maltose ABC transporter, permease component 2 AO353_25125
malG_Bb maltose ABC transporter, permease component 2 AO353_25125
malG_Sm maltose ABC transporter, permease component 2 AO353_25125
malG_Ss maltose ABC transporter, permease component 2
malI maltose transporter
malK maltose ABC transporter, ATPase component MalK AO353_25895 AO353_25130
malK1 maltose ABC transporter, ATPase component AO353_03380 AO353_25895
malK_Aa maltose ABC transporter, ATPase component AO353_03380 AO353_25895
malK_Bb maltose ABC transporter, ATPase component AO353_03380 AO353_25895
malK_Sm maltose ABC transporter, ATPase component AO353_25895 AO353_25130
malK_Ss maltose ABC transporter, ATPase component AO353_21860 AO353_05410
malP maltose phosphorylase
malX_Sm maltose ABC transporter, substrate-binding component
manX glucose PTS, enzyme EIIAB
manY glucose PTS, enzyme EIIC
manZ glucose PTS, enzyme EIID
mapP maltose 6'-phosphate phosphatase
MFS-glucose glucose transporter, MFS superfamily AO353_25100
mglA glucose ABC transporter, ATP-binding component (MglA) AO353_21385 AO353_20820
mglB glucose ABC transporter, substrate-binding component AO353_21380
mglC glucose ABC transporter, permease component (MglC) AO353_21390 AO353_20825
musE maltose ABC transporter, substrate-binding component MusE
musF maltose ABC transporter, permease component 1 (MusF)
musG maltose ABC transporter, permease component 2 (MusG)
musI maltose ABC transporter, uncharacterized membrane component MusI
musK maltose ABC transporter, ATPase component MusK AO353_03380 AO353_25895
PAST-A proton-associated sugar transporter A
pgmB beta-phosphoglucomutase AO353_00950
ptsG glucose PTS, enzyme IICB AO353_04465
ptsG-crr glucose PTS, enzyme II (CBA components, PtsG) AO353_04465
SemiSWEET Sugar transporter SemiSWEET
SSS-glucose Sodium/glucose cotransporter
SUC2 maltose:H+ symporter
SUT1 maltose:H+ symporter
SWEET1 bidirectional sugar transporter SWEET1
thuE maltose ABC transporter, substrate-binding component ThuE AO353_25115
thuF maltose ABC transporter, permease component 1 (ThuF) AO353_25120 AO353_25885
thuG maltose ABC transporter, permease component 2 (ThuG) AO353_25125 AO353_25890
thuK maltose ABC transporter, ATPase component ThuK AO353_25895 AO353_25130

Confidence: high confidence medium confidence low confidence
transporter – transporters and PTS systems are shaded because predicting their specificity is particularly challenging.

This GapMind analysis is from Sep 17 2021. The underlying query database was built on Sep 17 2021.

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About GapMind

Each pathway is defined by a set of rules based on individual steps or genes. Candidates for each step are identified by using ublast (a fast alternative to protein BLAST) against a database of manually-curated proteins (most of which are experimentally characterized) or by using HMMer with enzyme models (usually from TIGRFam). Ublast hits may be split across two different proteins.

A candidate for a step is "high confidence" if either:

where "other" refers to the best ublast hit to a sequence that is not annotated as performing this step (and is not "ignored").

Otherwise, a candidate is "medium confidence" if either:

Other blast hits with at least 50% coverage are "low confidence."

Steps with no high- or medium-confidence candidates may be considered "gaps." For the typical bacterium that can make all 20 amino acids, there are 1-2 gaps in amino acid biosynthesis pathways. For diverse bacteria and archaea that can utilize a carbon source, there is a complete high-confidence catabolic pathway (including a transporter) just 38% of the time, and there is a complete medium-confidence pathway 63% of the time. Gaps may be due to:

GapMind relies on the predicted proteins in the genome and does not search the six-frame translation. In most cases, you can search the six-frame translation by clicking on links to Curated BLAST for each step definition (in the per-step page).

For more information, see the paper from 2019 on GapMind for amino acid biosynthesis, the preprint on GapMind for carbon sources, or view the source code.

If you notice any errors or omissions in the step descriptions, or any questionable results, please let us know

by Morgan Price, Arkin group, Lawrence Berkeley National Laboratory