GapMind for catabolism of small carbon sources


D-glucuronate catabolism in Belnapia rosea CPCC 100156

Best path

dctP, dctQ, dctM, udh, gci, garL, garR, garK


Overview: Glucuronate utilization in GapMind is based on MetaCyc pathways D-glucuronate degradation II (oxidation of 5-keto-4-deoxyglucarate, link), a related pathway via 5-keto-4-deoxyglucarate aldolase (link), or degradation via fructuronate (link). GapMind also includes a variation on the oxidative pathway with a glucarolactonase, as in Pseudomonas putida. MetaCyc pathway I (via L-gulonate and xylitol, link) is not reported in prokaryotes and is not described here.

18 steps (13 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
dctP D-glucuronate TRAP transporter, solute receptor component BLR02_RS21710
dctQ D-glucuronate TRAP transporter, small permease component
dctM D-glucuronate TRAP transporter, large permease component BLR02_RS21700 BLR02_RS25115
udh D-glucuronate dehydrogenase BLR02_RS16205
gci D-glucaro-1,4-lactone cycloisomerase BLR02_RS03050 BLR02_RS06440
garL 5-dehydro-4-deoxy-D-glucarate aldolase BLR02_RS16825 BLR02_RS02000
garR tartronate semialdehyde reductase BLR02_RS17395 BLR02_RS01175
garK glycerate 2-kinase BLR02_RS05305
Alternative steps:
dopDH 2,5-dioxopentanonate dehydrogenase BLR02_RS18460 BLR02_RS07320
eda 2-keto-3-deoxygluconate 6-phosphate aldolase BLR02_RS17280 BLR02_RS16045
exuT D-glucuronate:H+ symporter ExuT
gudD D-glucarate dehydratase
kdgD 5-dehydro-4-deoxyglucarate dehydratase BLR02_RS02000 BLR02_RS20920
kdgK 2-keto-3-deoxygluconate kinase BLR02_RS17285 BLR02_RS22555
uxaC D-glucuronate isomerase
uxuA D-mannonate dehydratase BLR02_RS03050
uxuB D-mannonate dehydrogenase
uxuL D-glucaro-1,5-lactonase UxuL or UxuF BLR02_RS16110 BLR02_RS27415

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