GapMind for catabolism of small carbon sources

 

D-glucosamine (chitosamine) catabolism in Caulobacter crescentus NA1000

Best path

nagX, nagF, nagEcb, nagA, nagB

Also see fitness data for the top candidates

Rules

Overview: The canonical pathway for glucosamine utilization involves glucosamine 6-phosphate as an intermediate, as in N-acetylglucosamine utilization (link). GapMind also includes two other pathways: an oxidative pathway via glucosaminate ammonia-lyase, and a transmembrane transacetylase (NagX) pathway.

40 steps (24 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
nagX transmembrane glucosamine N-acetyltransferase NagX CCNA_00575
nagF N-acetylglucosamine phosphotransferase system, E-I, Hpr, and EII-A components (NagF) CCNA_00457 CCNA_00571
nagEcb N-acetylglucosamine phosphotransferase system, EII-CB components CCNA_00572 CCNA_00458
nagA N-acetylglucosamine 6-phosphate deacetylase CCNA_00452 CCNA_00568
nagB glucosamine 6-phosphate deaminase (isomerizing) CCNA_00453 CCNA_00569
Alternative steps:
AO353_21710 glucosaminate ABC transporter, substrate-binding component
AO353_21715 glucosaminate ABC transporter, permease component 1 CCNA_01507
AO353_21720 glucosaminate ABC transporter, permease component 2 CCNA_01507
AO353_21725 glucosaminate ABC transporter, ATPase component CCNA_01506 CCNA_02751
crr N-acetylglucosamine phosphotransferase system, EII-A component Crr CCNA_00571 CCNA_00457
gamP glucosamine PTS system, EII-CBA components (GamP/NagE) CCNA_00572 CCNA_00458
gdh quinoprotein glucose dehydrogenase CCNA_01575
glc-kinase glucosamine kinase CCNA_02133 CCNA_02549
glucosaminate-lyase glucosaminate ammonia-lyase CCNA_02964 CCNA_03013
kdgA 2-keto-3-deoxygluconate-6-phosphate aldolase EC:4.1.2.14 CCNA_00825 CCNA_01562
kdgK 2-keto-3-deoxygluconate kinase CCNA_01110 CCNA_01563
manX glucosamine PTS system, EII-AB component ManX
manY glucosamine PTS system, EII-C component ManY
manZ glucosamine PTS system, EII-D component ManZ
nag3 N-acetylglucosamine transporter nag3/nag4
nagEcba N-acetylglucosamine phosphotransferase system, EII-CBA components CCNA_00572 CCNA_00458
nagEIIA N-acetylglucosamine phosphotransferase system, EII-A component (PtsG/YpqE/GamP) CCNA_00572 CCNA_00458
nagK N-acetylglucosamine kinase CCNA_02133 CCNA_02549
nagP N-acetylglucosamine transporter NagP
nagPcb N-acetylglucosamine phosphotransferase system, EII-CB component NagP CCNA_00572 CCNA_00458
ngcE N-acetylglucosamine ABC transporter, substrate-binding component (NgcE)
ngcF N-acetylglucosamine ABC transporter, permease component 1 (NgcF)
ngcG N-acetylglucosamine ABC transporter, permease component 2 (NgcG)
ngt1 N-acetylglucosamine:H+ symporter Ngt1
ptsB N-acetylglucosamine-specific phosphotransferase system, EII-B component PtsB CCNA_00458 CCNA_00572
ptsC N-acetylglucosamine phosphotransferase system, EII-C component PtsC CCNA_00572 CCNA_00458
SLC2A2 glucosamine transporter SLC2A2
SM_b21216 ABC transporter for D-Glucosamine, ATPase component CCNA_03235 CCNA_01670
SM_b21219 ABC transporter for D-Glucosamine, permease component 1
SM_b21220 ABC transporter for D-Glucosamine, permease component 2
SM_b21221 ABC transporter for D-Glucosamine, substrate-binding protein
SMc02869 N-acetylglucosamine ABC transporter, ATPase component CCNA_03235 CCNA_01670
SMc02871 N-acetylglucosamine ABC transporter, permease component 2
SMc02872 N-acetylglucosamine ABC transporter, permease component 1 CCNA_00332
SMc02873 N-acetylglucosamine ABC transporter, substrate-binding component

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 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, 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