Itive search for orthologues of the 147 S. coelicolor TTA-containing genes (or in some cases gene clusters). We identified 19 that were widespread and frequently TTA-containing in 13 other Streptomyces genomes (Table 2). In addition, a further 10 genes or gene clusters frequently had TTA codons, even though their S. coelicolor orthologues were TTA-free (asterisks in Table 2). As 27/29 of the TTA-c
E difficult to be confident that reciprocal BLASTP hits between genomes are meaningful, particularly when the extent of amino acid identity falls well below levels that are typically seen for conserved housekeeping genes. For example, the general kind of anti-anti-sigma factor to which the BldG protein belongs is almost universally found among both Gram-positive firmicutes and actinobacteria; so t
Al best hit to rsbN is found next to nearly all bldN orthologues in actinomycete genomes; but, strikingly, the RsbN-like proteins are much more divergent than their BldN target or most other families of orthologous proteins of actinobacteria (Fig 6). We speculate that this may imply differences in the signal responsiveness of different RsbN proteins, thereby contributing to the differences between
Odon in one or another gene of the cluster.towards the start of genes that is observed in streptomycetes, and sometimes occur in conserved growthassociated genes (Chater Chandra, 2008). Interestingly, there is a strong target for BldD binding within bldA (den Hengst et al., 2010).Previously unnoticed aspects of the occurrence of conserved TTA codonsEarlier analyses had indicated that most of the
Translation (Nguyen et al., 2003; Takano et al., 2003). Translational regulation is via a very rare UUA codon in the adpA mRNA, falling between the segments encoding the two domains of AdpA. UUA is the only one of the six leucine codons to comprise only A and U residues, so the corresponding TTA codon is comparatively rare in GC-rich genomes ?it occurs in only 147 chromosomal genes in S. coelicolo
Translation (Nguyen et al., 2003; Takano et al., 2003). Translational regulation is via a very rare UUA codon in the adpA mRNA, falling between the segments encoding the two domains of AdpA. UUA is the only one of the six leucine codons to comprise only A and U residues, so the corresponding TTA codon is comparatively rare in GC-rich genomes ?it occurs in only 147 chromosomal genes in S. coelicolo
Factor (AbaA-like) Unknown Unknown SapB biosynthetic enzyme; regulator of SapB biosynthesis Possible phosphotransferase Component of conservon6/13; 7/14 9/11 6/10 8/13 8/12 9/14 8/14 3/11; 5/13 14/14 5/14 12/14 6/14 7/13 5/14 9/14 8/11 12/14 6/14 6/14 7/14 6/13 5/14 5/13 7/14 2/12; 7/12 10/12 9/(? (?(TTA) (? (TTA) (TTA) (??40040 (? 43220 (? ??49090 50850 (TTA) 51100 (TTA) 26520 19600 (? ???16190 3
Factor (AbaA-like) Unknown Unknown SapB biosynthetic enzyme; regulator of SapB biosynthesis Possible phosphotransferase Component of conservon6/13; 7/14 9/11 6/10 8/13 8/12 9/14 8/14 3/11; 5/13 14/14 5/14 12/14 6/14 7/13 5/14 9/14 8/11 12/14 6/14 6/14 7/14 6/13 5/14 5/13 7/14 2/12; 7/12 10/12 9/(? (?(TTA) (? (TTA) (TTA) (??40040 (? 43220 (? ??49090 50850 (TTA) 51100 (TTA) 26520 19600 (? ???16190 3