Arthrospira platensis Variants: A Comparative Study Based on C-phycocyanin Gene and Protein, Habitat, and Growth Conditions

This study aimed to map the differences between Arthrospira sp. and platensis strains variants from order Oscillatoriales at gene protein levels of C-phycocyanin alpha chain via multiple alignment, phylogenetic trees species, analysis nucleotide amino acid composition studied sequences. The links gene/protein environmental features habitat or source isolation were also investigated. Phycocyanin was extracted three A. strains: an Egyptian isolate cultivated in laboratory under static conditions a highly saline medium two commercial products. French strain showed highest extraction yield but lowest purity, color intensity pigment significantly weaker than those strains. All analyzed species had GC content more 54.5% high abundance alanine, encoded exclusively by GC-biased codons, their protein. frequencies acidic acids aspartic glutamic 5.2% 5.0% on average, respectively, which slightly higher basic residues (4.3% arginine, 0.6% histidine, lysine). Data relating most revealed harsh conditions, such as alkalinity, salinity, CO2 saturation, and/or temperature. These findings may link C-phycocyanin, is one important bioactive proteins platensis, adaptation this organism associate cultivation source.