In contrast, only the final gene of the DAP pathway was found in the genomes of the symbiont-harboring trypanosomatids, and the final two found in one regular trypanosomatid examined (H. muscarum), which explains why DAP could substitute for lysine in growth media of some regular trypanosomatids.
Regular examinations will continue to examine the condition of the wall.
The gene for EC:2.5.1.49 is present in the symbiont-harboring trypanosomatids and Herpetomonas, but in none of the other regular trypanosomatids examined.
The final enzyme in the urea cycle, arginase (EC:3.5.3.1), is present in all symbiont-harboring and regular trypanosomatids examined here.
The gene for EC:2.3.1.46, the first in the pathway converting homoserine to cystathionine, is present in all symbiont-harboring trypanosomatids and Herpetomonas, but in no other regular trypanosomatid examined.
However, homoserine is produced from aspartate semialdehyde through the mediation of homocysteine methyltransferase (EC:1.1.1.3), which is universally present in the genomes of all the endosymbionts, symbiont-harboring and regular trypanosomatids examined.
EC:2.5.1.48 is present in all symbiont-harboring and regular trypanosomatids examined, plus Trypanosoma sp. and a few other Eukaryota (mostly Apicomplexa and Stramenopiles), all within a group of Acidobacteria (BSV of 94).
This pathway is present, complete in all symbiont-harboring and regular trypanosomatids examined (Additional file 3), although there are questions regarding the step catalyzed by acireductone synthase (EC:3.1.3.77, see HGT and methionine and cysteine biosynthesis).
We also found that, in addition to the standard pathway for methionine/cysteine synthesis, all symbiont-harboring and regular trypanosomatids examined had the genes to produce cysteine from serine in a simple two-step reaction, with acetylserine as an intermediate.
In addition to isoleucine, valine, and leucine biosynthesis, this enzyme also participates in the degradation of these amino acids for their use in other metabolic processes in the cell, which might explain the presence of this enzyme as the only representative of the pathway in all regular trypanosomatids examined.
Fig. 3 Scenarios C and D. 3 pico cell cases with different values of d and L. The proposed algorithm achieves to compose the set of stream sequences having a regular structure by examining certain metric values obtained from the exhaustive analyses.
