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RISS 인기검색어
- 검색키워드
- 저자 : Barvkar Vitthal T. (검색결과 2 건)
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Pandith Shahzad A.,Dhar Niha,Bhosale Sumedha,Barvkar Vitthal T.,Razdan Sumeer,Shah Manzoor A.,Lattoo Surrinder K. 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.2
Rheum australe (Himalayan Rhubarb, Polygonaceae), an endangered medicinal and vegetable herb owes its age-old remedying properties to the bio-active phyto-constituents viz. anthraquinones, stilbenoids, chromones and dietary flavonoids. Polyketide pathway primarily involving the intricate Type III polyketide synthases (PKSs) contributes to the biosynthesis of these phyto-constituents. In the present study, we perform a homology-based approach to isolate an 1176 bp full-length cds sequence of the RaALS gene showing an equitable level of sequence similarity to related Type III PKSs at both nucleic acid and amino acid levels. In silico characterization revealed the presence of highly conserved amino acid residues found in nearly all Type III PKSs including the conserved active-site residues, signature motif and cyclization pocket residues with an exception of Ile256 and Gly258. Docking studies established major interactions between the starter acetyl-CoA and RaALS. Copy number analysis suggested slender evolution in Type III PKS in R. australe having a single copy of RaALS gene. qRT-PCR analyses revealed corroboration between the higher expression of RaALS in leaves followed by stem and root with that of the metabolite concentration. Expression studies further showed a direct increase of RaALS transcripts with the growing metabolite accretion in relation to altitude suggesting a probable involvement of specific Type III PKS in biosynthesis of the major phyto-constituents. Furthermore, abiotic stressors viz. methyl jasmonate, salicylic acid and UV light enhanced RaALS transcription hinting towards its role in defense mechanism in R. australe and highlighting the significance of RaALS as a prospective target for metabolic engineering.
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Darshetkar Ashwini M.,Patil Swaranjali S.,Pable Anupama A.,Nadaf Altafhusain B.,Barvkar Vitthal T. 한국식물생명공학회 2024 Plant biotechnology reports Vol.18 No.1
The mitochondrial genomes possess genes of five complexes involved in respiration. Mitochondrial gene content greatly varies across eukaryotes. Frequent gene losses have been reported in the mitogenomes of halophytes. In this study, we report, assemble, and annotate complete mitochondrial genome of a halophyte Pandanus odorifer (Forssk.) Kuntze (Pandanaceae). It is a commercially important species for its essential oil. It grows naturally in coastal regions and can withstand winds as well as salt sprays. The mitogenome of P. odorifer is circular with length of 330,962 bp. The genome contains 33 protein coding genes, 3 rRNAs, and 6 tRNAs. The analysis revealed that the important respiratory genes ccmC, cox1, nad1, nad4, and nad9 were pseudogenized in mitogenome but nuclear encoded copies of cox1, nad1, and nad9 were recovered. The phylogenetic analysis placed P. odorifer sister to P. tectorius. Further, mitogenome was compared with the other monocot mitogenomes for their gene contents. Thus, the study provides first complete mitochondrial genome for the family Pandan- aceae and order Pandanales.
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