GapMind for catabolism of small carbon sources


Alignments for a candidate for ptsB in Escherichia coli BW25113

Align IIB aka PtsB, component of N-Acetylglucosamine (NAG) porter (PtsBC1C2)(also may facilitate xylose transport) (characterized)
to candidate 15223 b1101 fused glucose-specific PTS enzymes: IIB component/IIC component (NCBI)

Query= TCDB::Q8GBT8
         (95 letters)

          Length = 477

 Score = 73.2 bits (178), Expect = 3e-18
 Identities = 35/71 (49%), Positives = 46/71 (64%)

           A  +VA  GG ENI  ++ CITRLR  V D SKVD+A LK  GA GVV  GS +Q + GT

Query: 83  DADPIAAEIED 93
            +D +  E+++
Sbjct: 462 KSDNLKTEMDE 472

Lambda     K      H
   0.314    0.130    0.357 

Lambda     K      H
   0.267   0.0410    0.140 

Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 1
Number of Hits to DB: 111
Number of extensions: 5
Number of successful extensions: 1
Number of sequences better than 1.0e-02: 1
Number of HSP's gapped: 1
Number of HSP's successfully gapped: 1
Length of query: 95
Length of database: 477
Length adjustment: 21
Effective length of query: 74
Effective length of database: 456
Effective search space:    33744
Effective search space used:    33744
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.3 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 42 (22.0 bits)
S2: 45 (21.9 bits)

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