Polyhydroxyalkanoate accumulation in Streptomyces coelicolor affected by SCO7613 gene region

Creative Commons License

Demir Oksuz Z., Doruk T., Yağcı N., Tunca Gedik S.

TURKISH JOURNAL OF BIOLOGY, cilt.45, sa.3, ss.275-286, 2021 (SCI-Expanded) identifier identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.3906/biy-2011-16
  • Dergi Adı: TURKISH JOURNAL OF BIOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, Veterinary Science Database, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.275-286
  • Anahtar Kelimeler: Streptomyces coelicolor, SCO7613, polyhydroxyalkanoate synthase, phaC, glycerol, BIOSYNTHESIS, SYNTHASES, ACID
  • Karadeniz Teknik Üniversitesi Adresli: Hayır

Özet

Polyhydroxyalkanoate (PHA) is stored as an important carbon and energy source in bacterial cells. For biomedical applications, gram-positive bacteria can be better sources of PHAs, since they lack outer membrane lipopolysaccharide. Although gram-positive Streptomyces coelicolor A3(2) has been indicated as a high potential PHA producer, phaC gene that encodes the key enzyme PHA synthase in the metabolic pathway is not determined in its genome. BLAST search results of the GenBank database argued that SCO7613 could specify a putative polyhydroxyalkanoate synthase (PhaC) responsible for PHA biosynthesis. Deduced amino acid sequence of SC07613 showed the presence of conserved lipase box like sequence, (55)(5)GASAG(555), in which serine residue was present as the active nucleophile. Present study describes deletion of putative S. coelicolor phaC gene via PCR dependent method. We showed that SCO7613 is not an essential gene in S. coelicolor and its deletion affected PHA accumulation negatively although it is not ceased. Transcomplementation abolished the mutant phenotype, demonstrating that the decrease in PHA resulted from the deletion of SCO7613.