GapMind for catabolism of small carbon sources


Finding step TM0027 for D-cellobiose catabolism in Shewanella loihica PV-4

2 candidates for TM0027: cellobiose ABC transporter, ATPase component 2

Score Gene Description Similar to Id. Cov. Bits Other hit Other id. Other bits
lo Shew_2502 ABC transporter-related protein (RefSeq) TM0027, component of β-glucoside porter (Conners et al., 2005). Binds cellobiose, laminaribiose (Nanavati et al. 2006). Regulated by cellobiose-responsive repressor BglR (characterized) 35% 94% 157.1 peptide transport system ATP-binding protein sapF 51% 268.1
lo Shew_2501 oligopeptide/dipeptide ABC transporter, ATPase subunit (RefSeq) TM0027, component of β-glucoside porter (Conners et al., 2005). Binds cellobiose, laminaribiose (Nanavati et al. 2006). Regulated by cellobiose-responsive repressor BglR (characterized) 31% 97% 123.6 SapD protein, component of Peptide transporter, SapABCDF. Mutants are more sensitive than the wild type to wheat alpha-thionin and to snakin-1, which is the most abundant antimicrobial peptide from potato tubers. They were also less virulent than was the wild-type strain in potato tubers: lesion areas were 37% that of the control, and the growth rate was two orders of magnitude lower. Thus, the interaction of antimicrobial peptides from the host with the sapA-F operon from the pathogen plays a similar role in animal and in plant bacterial pathogenesis 54% 375.9

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 TM0027

Or cluster all characterized TM0027 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