Alignments for a candidate for bkdA in Synechococcus elongatus PCC 7942

GapMind for catabolism of small carbon sources

Alignments for a candidate for bkdA in Synechococcus elongatus PCC 7942

Align 2-oxoisovalerate dehydrogenase subunit alpha; Branched-chain alpha-keto acid dehydrogenase E1 component alpha chain; BCKDH E1-alpha; EC 1.2.4.4 (characterized)
to candidate Synpcc7942_1944 Synpcc7942_1944 Pyruvate dehydrogenase (lipoamide)

Query= SwissProt::Q5SLR4
         (367 letters)



>FitnessBrowser__SynE:Synpcc7942_1944
          Length = 342

 Score =  176 bits (446), Expect = 8e-49
 Identities = 111/320 (34%), Positives = 163/320 (50%), Gaps = 10/320 (3%)

Query: 40  RLYRDMLAARMLDERYTILIRTGKT-SFIAPAAGHEAAQVAIAHAIRPGFDWVFPYYRDH 98
           R+Y DM+  R  +++   +   GK   F+    G EA    I  A+R   D+V   YRDH
Sbjct: 24  RIYEDMVLGRTFEDKCAEMYYRGKMFGFVHLYNGQEAVASGIIKAMRSD-DYVCSTYRDH 82

Query: 99  GLALALGIPLKELLGQMLATKADPNKGRQMPEHPGSKALNFFTVASPIASHVPPAAGAAI 158
             AL+ G+P ++++ ++   +   ++GR    H  S   N     + +A  +P A GAA 
Sbjct: 83  VHALSAGVPARQVMAELFGKETGCSRGRGGSMHLFSAEHNLLGGFAFVAEGIPVATGAAF 142

Query: 159 SMKLLRTG-------QVAVCTFGDGATSEGDWYAGINFAAVQGAPAVFIAENNFYAISVD 211
           +    R         QV  C FGDGA + G ++  +N A +   P +F+ ENN +AI + 
Sbjct: 143 TTAYRRNALGDTSADQVTACFFGDGAANNGQFFECLNMATLWKLPILFVVENNKWAIGMS 202

Query: 212 YRHQTHSPTIADKAHAFGIPGYLVDGMDVLASYYVVKEAVERARRGEGPSLVELRVYRYG 271
           +   T  P I  K  AFG+PG  VDGMDVLA   V +EA+ RAR GEGP+L+E   YR+ 
Sbjct: 203 HERATSDPEIYKKGPAFGMPGVEVDGMDVLAVRAVAQEAIARARAGEGPTLIEALTYRFR 262

Query: 272 PHSSADDDSRYRPKEEVAFWRKKDPIPRFRRFLEARGLWNEEWEEDVREEIRAELERGLK 331
            HS AD D   R KEE  FW  +DPI RF   L    L   E  + + ++I A +   ++
Sbjct: 263 GHSLADPD-ELRSKEEKEFWLARDPIKRFAAHLTEFNLATHEELKAIDKKIEALVAEAVE 321

Query: 332 EAEEAGPVPPEWMFEDVFAE 351
            A  +    PE +   ++AE
Sbjct: 322 FAISSPEPKPEELTRYIWAE 341


Lambda     K      H
   0.320    0.137    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: 350
Number of extensions: 20
Number of successful extensions: 3
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: 367
Length of database: 342
Length adjustment: 29
Effective length of query: 338
Effective length of database: 313
Effective search space:   105794
Effective search space used:   105794
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 (21.8 bits)
S2: 49 (23.5 bits)

This GapMind analysis is from Sep 17 2021. The underlying query database was built on Sep 17 2021.

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Protein sequences (fasta format)
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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