GapMind for catabolism of small carbon sources

 

Finding step tctA for citrate catabolism in Devosia chinhatensis IPL18

4 candidates for tctA: citrate/Na+ symporter, large transmembrane component TctA

Score Gene Description Similar to Id. Cov. Bits Other hit Other id. Other bits
hi VE26_RS03650 tripartite tricarboxylate transporter TctA Citrate uptake transporter, membrane subunit, component of Pmf-dependent citrate uptake porter, TctABC (characterized) 46% 98% 459.1 Large transmembrane protein of the aromatic acids transporter, component of Terephthalate (TPA) aromatic acid uptake transport system, TpiBA/TphC 44% 431.8
med VE26_RS11730 tripartite tricarboxylate transporter permease Tricarboxylate transport membrane protein TctA (characterized) 42% 97% 394.4 Large transmembrane protein of the aromatic acids transporter, component of Terephthalate (TPA) aromatic acid uptake transport system, TpiBA/TphC 51% 524.6
med VE26_RS15260 tripartite tricarboxylate transporter permease TctA, component of The tricarboxylate transporter, TctABC (characterized) 41% 98% 389 Large transmembrane protein of the aromatic acids transporter, component of Terephthalate (TPA) aromatic acid uptake transport system, TpiBA/TphC 63% 635.6
med VE26_RS14870 transporter TctA, component of The tricarboxylate transporter, TctABC (characterized) 34% 98% 320.1 Large transmembrane protein of the aromatic acids transporter, component of Terephthalate (TPA) aromatic acid uptake transport system, TpiBA/TphC 36% 302.8

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.

Definition of step tctA

Or cluster all characterized tctA proteins

This GapMind analysis is from Sep 24 2021. The underlying query database was built on Sep 17 2021.

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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