GapMind for catabolism of small carbon sources

 

L-tryptophan catabolism in Caulobacter crescentus NA1000

Best path

aroP, tnaA

Rules

Overview: Tryptophan degradation in GapMind is based on MetaCyc degradation pathways I via anthranilate (link), II via pyruvate (link), or IX via 3-hydroxyanthranilate (link). Pathway XII (link) overlaps with pathway I and is also represented. The other MetaCyc pathways do not yield fixed carbon or are not reported in prokaryotes, and are not included. For example, pathway IV yields indole-3-lactate, which could potentially be oxidized to indole-3-acetate, which has a known catabolic pathway, but no prokaryotes are known to consume tryptophan this way. Pathway VIII yields tryptophol (also known as indole-3-ethanol), which could potentially be oxidized to indole-3-acetate and consumed. Pathways X and XIII yield indole-3-propionate, which may spontaneously oxidize to kynurate, but kynurate catabolism is not reported.

47 steps (20 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
aroP tryptophan:H+ symporter AroP
tnaA tryptophanase
Alternative steps:
ackA acetate kinase
acs acetyl-CoA synthetase, AMP-forming CCNA_03696 CCNA_01889
adh acetaldehyde dehydrogenase (not acylating) CCNA_03695 CCNA_03242
ald-dh-CoA acetaldehyde dehydrogenase, acylating
andAa anthranilate 1,2-dioxygenase (deaminating, decarboxylating), ferredoxin--NAD(+) reductase component AndAa CCNA_03640 CCNA_00651
andAb anthranilate 1,2-dioxygenase (deaminating, decarboxylating), ferredoxin subunit AndAb
andAc anthranilate 1,2-dioxygenase (deaminating, decarboxylating), large subunit AndAc
andAd athranilate 1,2-dioxygenase (deaminating, decarboxylating), small subunit AndAd
antA anthranilate 1,2-dioxygenase (deaminating, decarboxylating), large subunit AntA
antB anthranilate 1,2-dioxygenase (deaminating, decarboxylating), small subunit AntB
antC anthranilate 1,2-dioxygenase (deaminating, decarboxylating), electron transfer component AntC
catA catechol 1,2-dioxygenase CCNA_02491
catB muconate cycloisomerase
catC muconolactone isomerase
catI 3-oxoadipate CoA-transferase subunit A (CatI)
catJ 3-oxoadipate CoA-transferase subunit B (CatJ)
ecfA1 energy-coupling factor transporter, ATPase 1 (A1) component CCNA_02751 CCNA_03235
ecfA2 energy-coupling factor transporter, ATPase 2 (A2) component CCNA_02751 CCNA_01670
ecfT energy-coupling factor transporter, transmembrane (T) component
hpaH anthranilate 3-monooxygenase (hydroxylase), FADH2-dependent
kyn kynureninase
kynA tryptophan 2,3-dioxygenase CCNA_02980
kynB kynurenine formamidase
mhpD 2-hydroxypentadienoate hydratase
mhpE 4-hydroxy-2-oxovalerate aldolase CCNA_01610
nbaC 3-hydroxyanthranilate 3,4-dioxygenase
nbaD 2-amino-3-carboxymuconate-6-semialdehyde decarboxylase
nbaE 2-aminomuconate 6-semialdehyde dehydrogenase CCNA_03243 CCNA_03695
nbaF 2-aminomuconate deaminase CCNA_02696 CCNA_01906
nbaG 2-oxo-3-hexenedioate decarboxylase CCNA_01577
pcaD 3-oxoadipate enol-lactone hydrolase CCNA_02494
pcaF succinyl-CoA:acetyl-CoA C-succinyltransferase CCNA_02490 CCNA_01168
pcaI 3-oxoadipate CoA-transferase subunit A (PcaI) CCNA_00206 CCNA_02488
pcaJ 3-oxoadipate CoA-transferase subunit B (PcaJ) CCNA_02489 CCNA_00207
praB 2-hydroxymuconate 6-semialdehyde dehydrogenase CCNA_03243 CCNA_03695
praC 2-hydroxymuconate tautomerase CCNA_03070
praD 2-oxohex-3-enedioate decarboxylase CCNA_01577
pta phosphate acetyltransferase CCNA_03663 CCNA_02704
sibC L-kynurenine 3-monooxygenase
TAT tryptophan permease
tnaB tryptophan:H+ symporter TnaB
tnaT tryptophan:Na+ symporter TnaT
trpP energy-coupling factor transporter, tryptophan-specific (S) component TrpP
xylE catechol 2,3-dioxygenase
xylF 2-hydroxymuconate semialdehyde hydrolase CCNA_02478

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.

Links

Downloads

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