GapMind for catabolism of small carbon sources


Alignments for a candidate for ptsB in Escherichia coli BW25113

Align PTS system N-acetylglucosamine-specific EIIB component; PTS system GlcNAc-specific EIIB component; N-acetylglucosamine-specific phosphotransferase enzyme IIB component; GlcNAc-specific phosphotransferase enzyme IIB component; EC (characterized)
to candidate 15742 b1621 fused maltose and glucose-specific PTS enzymes: IIB component -! IIC component (NCBI)

Query= SwissProt::Q9S2H6
         (77 letters)

          Length = 530

 Score = 55.5 bits (132), Expect = 6e-13
 Identities = 38/93 (40%), Positives = 48/93 (51%), Gaps = 16/93 (17%)

           +AS  EK VAG               LGG DNI  ++ CITRLR  V D +LVN  ALK 

             A GVV++    +QVVIG     +  E+  +M

Lambda     K      H
   0.315    0.133    0.360 

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: 101
Number of extensions: 10
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: 77
Length of database: 530
Length adjustment: 20
Effective length of query: 57
Effective length of database: 510
Effective search space:    29070
Effective search space used:    29070
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: 44 (21.6 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