Is that between pREB7 and pREB8, with 29 of pREB7 (or 38 of pREB8) nucleotides sharing 75 identity. The matching regions range from 100 to 8,500 bp with an average of 1,800 bp. Several plasmids also share a few very large homologous regions ( 10 kbp) but do not share a significant global sequence identity. The internal homology between all A. marina plasmids exceeds that seen between its plasmi
Oteins including the plant and Prochlorococcus enzymes responsible for the synthesis of Chl b from chlorophyllide a, chlorophyllide a oxygenase (CAO) (Fig. 2) (31). Five putative proteins containing a CAO-type Rieske-FeS motif are encoded by A. marina. Most of the candidate genes in A. marina fall into orthologous clusters with other hypothetical cyanobacterial proteins (Fig. 2). Only one protein,
R plants also synthesize both - and -carotene; however, -carotene is used primarily as a precursor of lutein, and only -carotene is found in reaction centers. Future biochemical work may indicate whether a preferential interaction between Chl d and -carotene (rather than -carotene) could account for its exclusivity in the reaction center. The chromosome of A. marina codes for 11 proteins predicted
E homologs to all known chlorophyll a biosynthesis genes. The two proteins responsible for the biosynthesis of Chl a from protoporphyrin IX, magnesium-protoporphyrin IX monomethyl ester oxidative cyclase (AcsF) and chlorophyll synthase (ChlG) (30), are highly homologous to those in other cyanobacteria, including a common conserved duplication of acsF. This indicates that Chl d is likely synthesize
R plants also synthesize both - and -carotene; however, -carotene is used primarily as a precursor of lutein, and only -carotene is found in reaction centers. Future biochemical work may indicate whether a preferential interaction between Chl d and -carotene (rather than -carotene) could account for its exclusivity in the reaction center. The chromosome of A. marina codes for 11 proteins predicted
Itrogen cycles in each of these environments where they modify their morphology, metabolism, and light-harvesting systems for survival in their respective niches. To date, genomes of 55 cyanobacterial strains in 21 genera have been completed or are under construction (National Center for Biotechnology Information). These cyanobacterial genomes are diverse in size, ranging from 1.66 to 9.1 Mbp. The
Tegory (rings 1 and 2), deviation from average GC content (ring 3), and GC skew (ring 4). All plasmids are represented at 10 scale for visualization except pREB9 at 500. Color codes are as follows: turquoise, small-molecule biosynthesis; yellow, central or intermediary metabolism; orange, energy metabolism; red, signal transduction; light blue, DNA metabolism; blue, transcription; purple, protein
Tegory (rings 1 and 2), deviation from average GC content (ring 3), and GC skew (ring 4). All plasmids are represented at 10 scale for visualization except pREB9 at 500. Color codes are as follows: turquoise, small-molecule biosynthesis; yellow, central or intermediary metabolism; orange, energy metabolism; red, signal transduction; light blue, DNA metabolism; blue, transcription; purple, protein