GapMind for catabolism of small carbon sources


D-glucosamine (chitosamine) catabolism in Burkholderia phytofirmans PsJN

Best path

gamP, nagB

Also see fitness data for the top candidates


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 (25 with candidates)

Or see definitions of steps

Step Description Best candidate 2nd candidate
gamP glucosamine PTS system, EII-CBA components (GamP/NagE) BPHYT_RS02745
nagB glucosamine 6-phosphate deaminase (isomerizing) BPHYT_RS02735 BPHYT_RS07410
Alternative steps:
AO353_21710 glucosaminate ABC transporter, substrate-binding component
AO353_21715 glucosaminate ABC transporter, permease component 1 BPHYT_RS08555 BPHYT_RS24040
AO353_21720 glucosaminate ABC transporter, permease component 2 BPHYT_RS08555 BPHYT_RS13290
AO353_21725 glucosaminate ABC transporter, ATPase component BPHYT_RS24035 BPHYT_RS13580
crr N-acetylglucosamine phosphotransferase system, EII-A component Crr BPHYT_RS02740
gdh quinoprotein glucose dehydrogenase BPHYT_RS08325
glc-kinase glucosamine kinase BPHYT_RS05010 BPHYT_RS19060
glucosaminate-lyase glucosaminate ammonia-lyase BPHYT_RS03115 BPHYT_RS05070
kdgA 2-keto-3-deoxygluconate-6-phosphate aldolase EC: BPHYT_RS16945 BPHYT_RS16730
kdgK 2-keto-3-deoxygluconate kinase BPHYT_RS09175 BPHYT_RS11300
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
nagA N-acetylglucosamine 6-phosphate deacetylase BPHYT_RS02730
nagEcb N-acetylglucosamine phosphotransferase system, EII-CB components BPHYT_RS02745
nagEcba N-acetylglucosamine phosphotransferase system, EII-CBA components BPHYT_RS02745
nagEIIA N-acetylglucosamine phosphotransferase system, EII-A component (PtsG/YpqE/GamP) BPHYT_RS02745 BPHYT_RS02740
nagF N-acetylglucosamine phosphotransferase system, E-I, Hpr, and EII-A components (NagF) BPHYT_RS02740 BPHYT_RS02575
nagK N-acetylglucosamine kinase BPHYT_RS05010 BPHYT_RS19060
nagP N-acetylglucosamine transporter NagP
nagPcb N-acetylglucosamine phosphotransferase system, EII-CB component NagP BPHYT_RS02745
nagX transmembrane glucosamine N-acetyltransferase NagX
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) BPHYT_RS22780 BPHYT_RS05035
ngt1 N-acetylglucosamine:H+ symporter Ngt1
ptsB N-acetylglucosamine-specific phosphotransferase system, EII-B component PtsB
ptsC N-acetylglucosamine phosphotransferase system, EII-C component PtsC BPHYT_RS02745
SLC2A2 glucosamine transporter SLC2A2
SM_b21216 ABC transporter for D-Glucosamine, ATPase component BPHYT_RS05040 BPHYT_RS17470
SM_b21219 ABC transporter for D-Glucosamine, permease component 1 BPHYT_RS35660 BPHYT_RS16105
SM_b21220 ABC transporter for D-Glucosamine, permease component 2 BPHYT_RS35665 BPHYT_RS27975
SM_b21221 ABC transporter for D-Glucosamine, substrate-binding protein
SMc02869 N-acetylglucosamine ABC transporter, ATPase component BPHYT_RS16095 BPHYT_RS35680
SMc02871 N-acetylglucosamine ABC transporter, permease component 2 BPHYT_RS22780
SMc02872 N-acetylglucosamine ABC transporter, permease component 1
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.



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 (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 the paper from 2019 on GapMind for amino acid biosynthesis, the paper from 2022 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