Alignments for a candidate for dctA in Escherichia coli BW25113

GapMind for catabolism of small carbon sources

Alignments for a candidate for dctA in Escherichia coli BW25113

Align Organic acid uptake porter, DctA of 444 aas and 8 - 10 putative TMSs (characterized)
to candidate 18105 b4077 glutamate/aspartate:proton symporter (NCBI)

Query= TCDB::Q848I3
         (444 letters)



>FitnessBrowser__Keio:18105
          Length = 437

 Score =  323 bits (827), Expect = 9e-93
 Identities = 171/417 (41%), Positives = 268/417 (64%), Gaps = 13/417 (3%)

Query: 10  SLYFQVIVAIAIGILLG---HFYPQTGV-----ALKPLGDGFIKLIKMVIAPIIFCTVVS 61
           SL +Q++ A+ +GILLG   H++  +        L P GD FI LIKM++ PI+  T+V 
Sbjct: 7   SLAWQILFAMVLGILLGSYLHYHSDSRDWLVVNLLSPAGDIFIHLIKMIVVPIVISTLVV 66

Query: 62  GIAGMQNMKSVGKTGGYALLYFEIVSTIALLIGLVVVNVVQPGNGMHID-VSTLDASKVA 120
           GIAG+ + K +G+ G   ++YFE+++T+A+++G+ + NV QPG G+ +  ++T+D SK  
Sbjct: 67  GIAGVGDAKQLGRIGAKTIIYFEVITTVAIILGITLANVFQPGAGVDMSQLATVDISKYQ 126

Query: 121 AYVTAGKDQS--IVGFILNVIPNTIVGAFANGDILQVLMFSVIFGFALHRLGA-YGKPVL 177
           +   A +  S  I+G IL+++P  IV + A G++L ++ FSV+FG  L  L A + +P++
Sbjct: 127 STTEAVQSSSHGIMGTILSLVPTNIVASMAKGEMLPIIFFSVLFGLGLSSLPATHREPLV 186

Query: 178 DFIDRFAHVMFNIINMIMKLAPIGALGAMAFTIGAYGVGSLVQLGQLMICFYITCVLFVL 237
                 +  MF + +M+M+ AP+G    +A T+  +G  SL  L +L++  +   + F L
Sbjct: 187 TVFRSISETMFKVTHMVMRYAPVGVFALIAVTVANFGFSSLWPLAKLVLLVHFAILFFAL 246

Query: 238 VVLGAICRAHGFSVLKLIRYIREELLIVLGTSSSESALPRMLIKMERLGAKKSVVGLVIP 297
           VVLG + R  G SV  LIR +++EL++   T+SSES LPR++ KME  GA  S+   V+P
Sbjct: 247 VVLGIVARLCGLSVWILIRILKDELILAYSTASSESVLPRIIEKMEAYGAPVSITSFVVP 306

Query: 298 TGYSFNLDGTSIYLTMAAVFIAQATDTHMDITHQITLLLVLLLSSKGAAGVTGSGFIVLA 357
           TGYSFNLDG+++Y ++AA+FIAQ     + I  +I L+L L+++SKG AGV G  F+VL 
Sbjct: 307 TGYSFNLDGSTLYQSIAAIFIAQLYGIDLSIWQEIILVLTLMVTSKGIAGVPGVSFVVLL 366

Query: 358 ATLSAVGHLPVAGLALILGIDRFMSEARALTNLVGNAVATVVVAKWVKELDEDQLQA 414
           ATL +VG +P+ GLA I G+DR +  AR   N+VGNA+A +V+AKW  + D  +  A
Sbjct: 367 ATLGSVG-IPLEGLAFIAGVDRILDMARTALNVVGNALAVLVIAKWEHKFDRKKALA 422


Lambda     K      H
   0.326    0.142    0.402 

Gapped
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: 495
Number of extensions: 23
Number of successful extensions: 5
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: 444
Length of database: 437
Length adjustment: 32
Effective length of query: 412
Effective length of database: 405
Effective search space:   166860
Effective search space used:   166860
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 15 ( 7.1 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 40 (21.6 bits)
S2: 51 (24.3 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:

ublast finds a hit to a characterized protein at above 40% identity and 80% coverage, and bits >= other bits+10.
- (Hits to curated proteins without experimental data as to their function are never considered high confidence.)
HMMer finds a hit with 80% coverage of the model, and either other identity < 40 or other coverage < 0.75.

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:

ublast finds a hit at above 40% identity and 70% coverage (ignoring otherBits).
ublast finds a hit at above 30% identity and 80% coverage, and bits >= other bits.
HMMer finds a hit (regardless of coverage or other bits).

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:

our ignorance of proteins' functions,
omissions in the gene models,
frame-shift errors in the genome sequence, or
the organism lacks the pathway.

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:

the paper from 2019 on GapMind for amino acid biosynthesis
the paper from 2022 on GapMind for carbon sources
the source code
instructions for running GapMind on your computer

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

GapMind for catabolism of small carbon sources