GapMind for catabolism of small carbon sources


putrescine catabolism in Pseudomonas fluorescens FW300-N2C3

Best path

potA, potB, potC, potD, puuA, puuB, puuC, puuD, gabT, gabD

Also see fitness data for the top candidates


Overview: Putrescine degradation in GapMind is based on MetaCyc pathways putrescine degradation I via putrescine aminotransferase (link), pathway II with glutamylated intermediates (link), pathway IV via putrescine oxidase (link), or pathway V via putrescine:pyruvate aminotransferase (link). Pathway III is not reported in prokaryotes, so it is not included in GapMind.

18 steps (13 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
potA putrescine ABC transporter, ATPase component (PotA/PotG) AO356_13165 AO356_19360
potB putrescine ABC transporter, permease component 1 (PotB/PotH) AO356_13170 AO356_01645
potC putrescine ABC transporter, permease component 2 (PotC/PotI) AO356_13175 AO356_14400
potD putrescine ABC transporter, substrate-binding component (PotD/PotF) AO356_13155 AO356_12080
puuA glutamate-putrescine ligase AO356_13135 AO356_13145
puuB gamma-glutamylputrescine oxidase AO356_21495 AO356_12605
puuC gamma-glutamyl-gamma-aminobutyraldehyde dehydrogenase AO356_12580 AO356_09270
puuD gamma-glutamyl-gamma-aminobutyrate hydrolase AO356_13140
gabT gamma-aminobutyrate transaminase AO356_13150 AO356_26715
gabD succinate semialdehyde dehydrogenase AO356_10720 AO356_30285
Alternative steps:
patA putrescine aminotransferase (PatA/SpuC) AO356_13150 AO356_28705
patD gamma-aminobutyraldehyde dehydrogenase AO356_06315 AO356_06290
POT1 putrescine:H+ symporter POT1
potE putrescine:H+ symporter PotE
puo putrescine oxidase
puuP putrescine:H+ symporter PuuP/PlaP AO356_01520
TPO1 putrescine transporter TPO1
UGA4 putrescine transporter UGA4

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.



Related tools

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 against a database of manually-curated proteins (most of which are experimentally characterized) or by using HMMer. 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. 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