In contrast, more recent (terminal) snake branches have typical dN/dS ratios, indicating that strong purifying selection to conserve protein function subsequently resumed (Figures S1, S2, S3, S4, S5, S6, S7, S8).
Mitochondrial protein-coding genes normally have low rates of non-synonymous change (changes that alter amino acids) compared to synonymous change (dN/dS), due to strong purifying selection to conserve protein function [14], [15].
SIFT makes use of sequence homology and median evolutionary conservation scores to predict conserved protein function.
Consequently, we considered only protein identity that was 20% or higher as indication for functional conservation, a value that corresponds with previous reports that conserved protein function is indicated by at least 18 20% protein sequence identity [ 35].
The results demonstrated that mouse Syx1b can efficiently and functionally replace zebrafish Syx in developing embryos, indicating evolutionarily conserved protein function; and that the MO effects are specific to Syx.
Overall, there was greater amino acid conservation between DIA1 and DIA1R proteins in the central portion, which suggests this region mediates a key, conserved protein function.
Conversely, as species diverge the small number of radical mutations may be explained by the conservation of physiochemical properties, which are often conserved to maintain protein function even across evolutionary distant species [ 40].
Depending on the strain, the number of proteins of unknown function (or conserved proteins of unknown function) encoded by the strain-specific genes ranged from 73to84%4% in.
In sum, our experiments identified reproducible, genome-wide binding data for three liver-specific TFs with highly conserved protein sequences and cellular functions in matched tissues from five mouse species.
Here, we show that Drosophila Clueless (Clu), a highly conserved protein required for normal mitochondrial function, can associate with Translocase of the outer membrane (TOM) 20, Porin and PINK1, and is thus located at the mitochondrial outer membrane.
These represent highly conserved proteins of unknown function, presumably associated with cellular function, but still uncharacterized.
