GapMind for catabolism of small carbon sources


Finding step proV for L-proline catabolism in Shewanella sp. ANA-3

4 candidates for proV: proline ABC transporter, ATPase component ProV

Score Gene Description Similar to Id. Cov. Bits Other hit Other id. Other bits
lo Shewana3_3096 spermidine/putrescine ABC transporter ATPase subunit (RefSeq) Glycine betaine/proline betaine transport system ATP-binding protein ProV (characterized) 42% 57% 178.7 PotG aka B0855, component of Putrescine porter 63% 439.5
lo Shewana3_3192 sulfate ABC transporter, ATPase subunit (RefSeq) glycine betaine/l-proline transport atp-binding protein prov (characterized) 38% 64% 168.3 CysA aka B2422, component of Sulfate/thiosulfate porter 57% 364.4
lo Shewana3_0880 ABC transporter related (RefSeq) Glycine betaine/proline betaine transport system ATP-binding protein ProV (characterized) 37% 66% 160.2 Glutamine ABC transporter ATP-binding protein, component of Glutamine transporter, GlnQP. Takes up glutamine, asparagine and glutamate which compete for each other for binding both substrate and the transmembrane protein constituent of the system (Fulyani et al. 2015). Tandem substrate binding domains (SBDs) differ in substrate specificity and affinity, allowing cells to efficiently accumulate different amino acids via a single ABC transporter. Analysis revealed the roles of individual residues in determining the substrate affinity 66% 308.5
lo Shewana3_0678 ABC transporter related (RefSeq) glycine betaine/l-proline transport atp-binding protein prov (characterized) 36% 63% 152.1 Intermembrane phospholipid transport system ATP-binding protein MlaF; EC 7.6.2.- 65% 363.2

Confidence: high confidence medium confidence low confidence
transporter – transporters and PTS systems are shaded because predicting their specificity is particularly challenging.

GapMind searches the predicted proteins for candidates by using ublast (a fast alternative to protein BLAST) to find similarities to characterized proteins or by using HMMer to find similarities to enzyme models (usually from TIGRFams). For alignments to characterized proteins (from ublast), scores of 44 bits correspond to an expectation value (E) of about 0.001.

Also see fitness data for the candidates

Definition of step proV

Or cluster all characterized proV proteins

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 (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