GapMind for Amino acid biosynthesis

 

Finding step hisN for L-histidine biosynthesis in Synechococcus elongatus PCC 7942

Manual classification of gap: novel
Rationale: Synpcc7942_1763 could be a diverged histidinol-phosphate phosphatase, but it is not required for growth. (This is a strictly autotrophic organism.) This implies that there is another novel histidinol phosphatase (and the function of Synpcc7942_1763 remains uncertain).

4 candidates for hisN: histidinol-phosphate phosphatase

Score Gene Description Similar to Id. Cov. Bits Other hit Other id. Other bits
med Synpcc7942_1763 inositol monophosphate family protein Histidinol-phosphatase; HolPase; Histidinol-phosphate phosphatase; EC 3.1.3.15 (characterized) 30% 87% 84.7 inositol-phosphate phosphatase (EC 3.1.3.25); L-galactose 1-phosphate phosphatase (EC 3.1.3.93) 33% 75.5
lo Synpcc7942_0125 imidazoleglycerol-phosphate dehydratase Histidine biosynthesis bifunctional protein HisB; EC 3.1.3.15; EC 4.2.1.19 (characterized) 47% 50% 183 Imidazoleglycerol-phosphate dehydratase 1, chloroplastic; IGPD 1; Protein HISTIDINE BIOSYNTHESIS 5A; EC 4.2.1.19 66% 265.8
lo Synpcc7942_2582 myo-inositol-1(or 4)-monophosphatase Histidinol-phosphatase; HolPase; EC 3.1.3.15; Histidinol-phosphate phosphatase (uncharacterized) 33% 93% 105.9 inositol-phosphate phosphatase (EC 3.1.3.25) 41% 196.4
lo Synpcc7942_B2619 carbonic anhydrase, putative histidinol-phosphatase (EC 3.1.3.15) (characterized) 31% 89% 95.5 Beta-carbonic anhydrase 1; Beta-CA 1; Carbonate dehydratase 1; mtCA 1; EC 4.2.1.1 40% 123.6

Confidence: high confidence medium confidence low confidence
? – known gap: despite the lack of a good candidate for this step, this organism (or a related organism) performs the pathway

Also see fitness data for the candidates

Definition of step hisN

Or cluster all characterized hisN proteins

Known gaps in related organisms

This GapMind analysis is from Mar 30 2021. The underlying query database was built on Mar 30 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 against a database of manually-curated proteins (most of which are experimentally characterized) or by using HMMer. 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. 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 the paper from 2019 on GapMind for amino acid biosynthesis, or view the source code, or see 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