GapMind for catabolism of small carbon sources

 

Finding step aglG for trehalose catabolism in Phyllobacterium brassicacearum STM 196

4 candidates for aglG: trehalose ABC transporter, permease component 2 (AglG)

Score Gene Description Similar to Id. Cov. Bits Other hit Other id. Other bits
lo CU102_RS08095 carbohydrate ABC transporter permease ABC transporter for D-Maltose and D-Trehalose, permease component 2 (characterized) 33% 64% 138.3 ABC transporter for D-Trehalose, permease component 2 77% 420.2
lo CU102_RS20480 carbohydrate ABC transporter permease ABC transporter for D-Maltose and D-Trehalose, permease component 2 (characterized) 32% 62% 134 ABC-type transporter, integral membrane subunit, component of Trehalose porter. Also binds sucrose (Boucher and Noll, 2011). Induced by glucose and trehalose. Directly regulated by trehalose-responsive regulator TreR 39% 204.9
lo CU102_RS21030 carbohydrate ABC transporter permease Inner membrane ABC transporter permease protein (characterized, see rationale) 31% 72% 131.7 Alpha-1,4-digalacturonate porter (Nanavati et al., 2006). Regulated by pectin utilization regulon UxaR 44% 216.9
lo CU102_RS05075 carbohydrate ABC transporter permease Inner membrane ABC transporter permease protein (characterized, see rationale) 32% 63% 114 Alpha-1,4-digalacturonate porter (Nanavati et al., 2006). Regulated by pectin utilization regulon UxaR 32% 174.5

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 aglG

Or cluster all characterized aglG 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