Alignments for a candidate for leuD in Escherichia coli BW25113

GapMind for Amino acid biosynthesis

Alignments for a candidate for leuD in Escherichia coli BW25113

Align 3-isopropylmalate dehydratase subunit LeuD (EC 4.2.1.33) (characterized)
to candidate 14217 b0071 isopropylmalate isomerase small subunit (NCBI)

Query= ecocyc::LEUD-MONOMER
         (201 letters)



>FitnessBrowser__Keio:14217
          Length = 201

 Score =  413 bits (1061), Expect = e-120
 Identities = 201/201 (100%), Positives = 201/201 (100%)

Query: 1   MAEKFIKHTGLVVPLDAANVDTDAIIPKQFLQKVTRTGFGAHLFNDWRFLDEKGQQPNPD 60
           MAEKFIKHTGLVVPLDAANVDTDAIIPKQFLQKVTRTGFGAHLFNDWRFLDEKGQQPNPD
Sbjct: 1   MAEKFIKHTGLVVPLDAANVDTDAIIPKQFLQKVTRTGFGAHLFNDWRFLDEKGQQPNPD 60

Query: 61  FVLNFPQYQGASILLARENFGCGSSREHAPWALTDYGFKVVIAPSFADIFYGNSFNNQLL 120
           FVLNFPQYQGASILLARENFGCGSSREHAPWALTDYGFKVVIAPSFADIFYGNSFNNQLL
Sbjct: 61  FVLNFPQYQGASILLARENFGCGSSREHAPWALTDYGFKVVIAPSFADIFYGNSFNNQLL 120

Query: 121 PVKLSDAEVDELFALVKANPGIHFDVDLEAQEVKAGEKTYRFTIDAFRRHCMMNGLDSIG 180
           PVKLSDAEVDELFALVKANPGIHFDVDLEAQEVKAGEKTYRFTIDAFRRHCMMNGLDSIG
Sbjct: 121 PVKLSDAEVDELFALVKANPGIHFDVDLEAQEVKAGEKTYRFTIDAFRRHCMMNGLDSIG 180

Query: 181 LTLQHDDAIAAYEAKQPAFMN 201
           LTLQHDDAIAAYEAKQPAFMN
Sbjct: 181 LTLQHDDAIAAYEAKQPAFMN 201


Lambda     K      H
   0.322    0.138    0.421 

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: 279
Number of extensions: 3
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: 201
Length of database: 201
Length adjustment: 21
Effective length of query: 180
Effective length of database: 180
Effective search space:    32400
Effective search space used:    32400
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 45 (21.9 bits)

Align candidate 14217 b0071 (isopropylmalate isomerase small subunit (NCBI))
to HMM TIGR00171 (leuD: 3-isopropylmalate dehydratase, small subunit (EC 4.2.1.33))

# hmmsearch :: search profile(s) against a sequence database
# HMMER 3.3.1 (Jul 2020); http://hmmer.org/
# Copyright (C) 2020 Howard Hughes Medical Institute.
# Freely distributed under the BSD open source license.
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# query HMM file:                  ../tmp/path.aa/TIGR00171.hmm
# target sequence database:        /tmp/gapView.8943.genome.faa
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Query:       TIGR00171  [M=188]
Accession:   TIGR00171
Description: leuD: 3-isopropylmalate dehydratase, small subunit
Scores for complete sequences (score includes all domains):
   --- full sequence ---   --- best 1 domain ---    -#dom-
    E-value  score  bias    E-value  score  bias    exp  N  Sequence                       Description
    ------- ------ -----    ------- ------ -----   ---- --  --------                       -----------
   1.2e-107  343.9   0.0   1.3e-107  343.8   0.0    1.0  1  lcl|FitnessBrowser__Keio:14217  b0071 isopropylmalate isomerase 


Domain annotation for each sequence (and alignments):
>> lcl|FitnessBrowser__Keio:14217  b0071 isopropylmalate isomerase small subunit (NCBI)
   #    score  bias  c-Evalue  i-Evalue hmmfrom  hmm to    alifrom  ali to    envfrom  env to     acc
 ---   ------ ----- --------- --------- ------- -------    ------- -------    ------- -------    ----
   1 !  343.8   0.0  1.3e-107  1.3e-107       2     188 .]       3     189 ..       1     189 [. 0.99

  Alignments for each domain:
  == domain 1  score: 343.8 bits;  conditional E-value: 1.3e-107
                       TIGR00171   2 kefkkltGlvvpldkanvdtdaiipkqflkkikrtGfgkhlfyewryldekGkepnpefvlnvpqyqgasillarenfG 80 
                                     ++f+k+tGlvvpld+anvdtdaiipkqfl+k++rtGfg+hlf++wr+ldekG++pnp+fvln+pqyqgasillarenfG
  lcl|FitnessBrowser__Keio:14217   3 EKFIKHTGLVVPLDAANVDTDAIIPKQFLQKVTRTGFGAHLFNDWRFLDEKGQQPNPDFVLNFPQYQGASILLARENFG 81 
                                     45***************************************************************************** PP

                       TIGR00171  81 cGssrehapwalkdyGfkviiapsfadifynnsfkngllpirlseeeveellalvk.nkglkltvdleaqkvkdsegkv 158
                                     cGssrehapwal+dyGfkv+iapsfadify+nsf+n+llp++ls++ev+el+alvk n+g++++vdleaq+vk++e k+
  lcl|FitnessBrowser__Keio:14217  82 CGSSREHAPWALTDYGFKVVIAPSFADIFYGNSFNNQLLPVKLSDAEVDELFALVKaNPGIHFDVDLEAQEVKAGE-KT 159
                                     *******************************************************99*******************.** PP

                       TIGR00171 159 ysfeidefrkhcllnGldeigltlqkedei 188
                                     y+f+id+fr+hc++nGld+igltlq++d+i
  lcl|FitnessBrowser__Keio:14217 160 YRFTIDAFRRHCMMNGLDSIGLTLQHDDAI 189
                                     ****************************97 PP



Internal pipeline statistics summary:
-------------------------------------
Query model(s):                            1  (188 nodes)
Target sequences:                          1  (201 residues searched)
Passed MSV filter:                         1  (1); expected 0.0 (0.02)
Passed bias filter:                        1  (1); expected 0.0 (0.02)
Passed Vit filter:                         1  (1); expected 0.0 (0.001)
Passed Fwd filter:                         1  (1); expected 0.0 (1e-05)
Initial search space (Z):                  1  [actual number of targets]
Domain search space  (domZ):               1  [number of targets reported over threshold]
# CPU time: 0.01u 0.00s 00:00:00.01 Elapsed: 00:00:00.00
# Mc/sec: 7.82
//
[ok]

This GapMind analysis is from Apr 09 2024. The underlying query database was built on Apr 09 2024.

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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
changes to Amino acid biosynthesis since the publication.

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 Amino acid biosynthesis