Finding step KDF-hydrolase for L-fucose catabolism in Phyllobacterium brassicacearum STM 196
4 candidates for KDF-hydrolase: 2,4-diketo-3-deoxy-L-fuconate hydrolase
| Score | Gene | Description | Similar to | Id. | Cov. | Bits | Other hit | Other id. | Other bits |
|---|
| hi | CU102_RS28865 | fumarylacetoacetate hydrolase family protein | L-2,4-diketo-3-deoxyrhamnonate hydrolase; 2,4-dioxopentanoate hydrolase (characterized) | 85% | 100% | 495.4 | 2,4-dihydroxy-5-methyl-6-oxohexa-2,4-dienoate isomerase | 36% | 173.7 |
| hi | CU102_RS18365 | fumarylacetoacetate hydrolase family protein | L-2,4-diketo-3-deoxyrhamnonate hydrolase; 2,4-dioxopentanoate hydrolase (characterized) | 75% | 99% | 427.6 | 2,4-dihydroxy-5-methyl-6-oxohexa-2,4-dienoate isomerase | 36% | 175.6 |
| med | CU102_RS04165 | fumarylacetoacetate hydrolase family protein | L-2,4-diketo-3-deoxyrhamnonate hydrolase; 2,4-dioxopentanoate hydrolase (characterized) | 35% | 90% | 131.7 | Acylpyruvase FAHD1, mitochondrial; Fumarylacetoacetate hydrolase domain-containing protein 1; Oxaloacetate decarboxylase; OAA decarboxylase; EC 3.7.1.5; EC 4.1.1.112 | 34% | 106.7 |
| lo | CU102_RS25705 | fumarylacetoacetate hydrolase family protein | 2-keto-4-pentenoate hydratase/2-oxohepta-3-ene-1,7-dioic acid hydratase (Catechol pathway) protein; EC 4.2.1.80 (characterized, see rationale) | 32% | 75% | 109 | 3-fumarylpyruvate hydrolase (EC 3.7.1.20) | 53% | 261.2 |
Confidence: high confidence medium confidence low confidence
transporter – transporters and PTS systems are shaded because predicting their specificity is particularly challenging.
GapMind searches the predicted proteins for candidates by using ublast (a fast alternative to protein BLAST) to find similarities to characterized proteins or by using HMMer to find similarities to enzyme models (usually from TIGRFams). For alignments to characterized proteins (from ublast), scores of 44 bits correspond to an expectation value (E) of about 0.001.
Definition of step KDF-hydrolase
- UniProt sequence A0A2E7P912: SubName: Full=FAA hydrolase family protein {ECO:0000313|EMBL:MBO18215.1};
- Curated sequence BPHYT_RS34210: 2,4-diketo-3-deoxy-L-rhamnonate hydrolase (EC 3.7.1.-)
- Curated sequence SM_b21112: L-2,4-diketo-3-deoxyrhamnonate hydrolase; 2,4-dioxopentanoate hydrolase
- UniProt sequence D8INW0: SubName: Full=2-keto-4-pentenoate hydratase/2-oxohepta-3-ene-1,7-dioic acid hydratase (Catechol pathway) protein {ECO:0000313|EMBL:ADJ62780.1}; EC=4.2.1.80 {ECO:0000313|EMBL:ADJ62780.1};
- Ignore hits to Q39BA7 when looking for 'other' hits (Ureidoglycolate lyase; UGL; Ureidoglycolase; Ureidoglycolatase; Ureidoglycolate hydrolase; EC 4.3.2.3)
- Curated sequence MONOMER-16233: L-2-keto-3-deoxyrhamnonate 4-dehydrogenase subunit (EC 1.1.1.401)
- Comment: C785_RS20550 (A0A2E7P912) was shown to be a L-2-keto-3-deoxyfuconate (L-KDF) hydrolase by PMC6336799. HSERO_RS06355 (D8INW0) is important for fucose utilization. Q39BA7 is rather closely related but is reported to be a ureidoglycolate lyase. metacyc MONOMER-16233 is misannotated as a dehydrogenase in MetaCyc -- it is the hydrolase.
Or cluster all characterized KDF-hydrolase proteins
This GapMind analysis is from Sep 24 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:
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