GapMind for catabolism of small carbon sources

 

L-tryptophan catabolism in Halobacillus alkaliphilus FP5

Best path

trpP, ecfA1, ecfA2, ecfT, 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 (21 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
trpP energy-coupling factor transporter, tryptophan-specific (S) component TrpP BMZ06_RS17760
ecfA1 energy-coupling factor transporter, ATPase 1 (A1) component BMZ06_RS12835 BMZ06_RS12840
ecfA2 energy-coupling factor transporter, ATPase 2 (A2) component BMZ06_RS12840 BMZ06_RS12835
ecfT energy-coupling factor transporter, transmembrane (T) component BMZ06_RS12845
tnaA tryptophanase
Alternative steps:
ackA acetate kinase BMZ06_RS18185 BMZ06_RS13245
acs acetyl-CoA synthetase, AMP-forming BMZ06_RS17975 BMZ06_RS02730
adh acetaldehyde dehydrogenase (not acylating) BMZ06_RS08010 BMZ06_RS19550
ald-dh-CoA acetaldehyde dehydrogenase, acylating
andAa anthranilate 1,2-dioxygenase (deaminating, decarboxylating), ferredoxin--NAD(+) reductase component AndAa
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
aroP tryptophan:H+ symporter AroP BMZ06_RS01185
catA catechol 1,2-dioxygenase
catB muconate cycloisomerase BMZ06_RS08385
catC muconolactone isomerase
catI 3-oxoadipate CoA-transferase subunit A (CatI)
catJ 3-oxoadipate CoA-transferase subunit B (CatJ)
hpaH anthranilate 3-monooxygenase (hydroxylase), FADH2-dependent BMZ06_RS06070 BMZ06_RS09400
kyn kynureninase BMZ06_RS13070
kynA tryptophan 2,3-dioxygenase BMZ06_RS07785
kynB kynurenine formamidase BMZ06_RS13075 BMZ06_RS08670
mhpD 2-hydroxypentadienoate hydratase
mhpE 4-hydroxy-2-oxovalerate aldolase
nbaC 3-hydroxyanthranilate 3,4-dioxygenase
nbaD 2-amino-3-carboxymuconate-6-semialdehyde decarboxylase
nbaE 2-aminomuconate 6-semialdehyde dehydrogenase BMZ06_RS06075 BMZ06_RS18260
nbaF 2-aminomuconate deaminase BMZ06_RS08340
nbaG 2-oxo-3-hexenedioate decarboxylase
pcaD 3-oxoadipate enol-lactone hydrolase
pcaF succinyl-CoA:acetyl-CoA C-succinyltransferase BMZ06_RS07240 BMZ06_RS07305
pcaI 3-oxoadipate CoA-transferase subunit A (PcaI) BMZ06_RS15430 BMZ06_RS18670
pcaJ 3-oxoadipate CoA-transferase subunit B (PcaJ) BMZ06_RS15425 BMZ06_RS18665
praB 2-hydroxymuconate 6-semialdehyde dehydrogenase BMZ06_RS06075 BMZ06_RS18260
praC 2-hydroxymuconate tautomerase
praD 2-oxohex-3-enedioate decarboxylase
pta phosphate acetyltransferase BMZ06_RS06610 BMZ06_RS01085
sibC L-kynurenine 3-monooxygenase
TAT tryptophan permease
tnaB tryptophan:H+ symporter TnaB
tnaT tryptophan:Na+ symporter TnaT
xylE catechol 2,3-dioxygenase BMZ06_RS02010 BMZ06_RS06065
xylF 2-hydroxymuconate semialdehyde hydrolase

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 24 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:

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