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5. Draft Genome of the Liver Fluke Fasciola gigantica

Author

Tripti Pandey, Arpita Ghosh, Vivek N. Todur, Vijayakumar Rajendran, Parismita Kalita, Jupitara Kalita, Rohit Shukla, Purna B. Chetri, Harish Shukla, Amit Sonkar, Denzelle Lee Lyngdoh, Radhika Singh, Heena Khan, Joplin Nongkhlaw, Kanhu Charan Das, and Timir Tripathi

Subjects
Chemistry, QD1-999
Published
2020
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20. Draft Genome of the Liver Fluke Fasciola gigantica .

Author

Pandey T, Ghosh A, Todur VN, Rajendran V, Kalita P, Kalita J, Shukla R, Chetri PB, Shukla H, Sonkar A, Lyngdoh DL, Singh R, Khan H, Nongkhlaw J, Das KC, and Tripathi T

Abstract

Fascioliasis, a neglected foodborne disease caused by liver flukes (genus Fasciola ), affects more than 200 million people worldwide. Despite technological advances, little is known about the molecular biology and biochemistry of these flukes. We present the draft genome of Fasciola gigantica for the first time. The assembled draft genome has a size of ∼1.04 Gb with an N50 and N90 of 129 and 149 kb, respectively. A total of 20 858 genes were predicted. The de novo repeats identified in the draft genome were 46.85%. The pathway included all of the genes of glycolysis, Krebs cycle, and fatty acid metabolism but lacked the key genes of the fatty acid biosynthesis pathway. This indicates that the fatty acid required for survival of the fluke may be acquired from the host bile. It may be hypothesized that the relatively larger F. gigantica genome did not evolve through genome duplications but rather is interspersed with many repetitive elements. The genomic information will provide a comprehensive resource to facilitate the development of novel interventions for fascioliasis control., Competing Interests: The authors declare no competing financial interest., (Copyright © 2020 American Chemical Society.)

Published
2020
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21. Lanthanide(III)-Based Single-Ion Magnets.

Author

Dey A, Kalita P, and Chandrasekhar V

Abstract

Mononuclear lanthanide-based single-ion magnets (SIMs) are known since 2003 with the discovery of SIM properties in a bis-(phthalocyaninato)lanthanide complex. A recent report on [Dy(Cp ttt ) 2 ][BC 6 F 5 ] indicating that it exhibits the highest known blocking temperature (60 K) has spurred fresh interest in this area. In this article, we discuss about the various requirements of lanthanide-based SIMs along with representative examples. Specifically, we describe the complexes whose coordination numbers vary from 2 to 8. We also discuss the representative examples of organometallic lanthanide complexes that can function as molecular magnets., Competing Interests: The authors declare no competing financial interest.

Published
2018
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22. Heterometallic Octanuclear Ni II 4 Ln III 4 (Ln = Y, Gd, Tb, Dy, Ho, Er) Complexes Containing Ni II 2 Ln III 2 O 4 Distorted Cubane Motifs: Synthesis, Structure, and Magnetic Properties.

Author

Kalita P, Goura J, Herrera JM, Colacio E, and Chandrasekhar V

Abstract

The reaction of 2-methoxy-6-[{2-(2-hydroxyethylamino)ethylimino}methyl] phenol (LH 3 ) with lanthanide metal salts followed by the addition of nickel acetate allowed isolation of a family of octanuclear complexes, [Ni 4 Ln 4 (μ 2 -OH) 2 (μ 3 -OH) 4 (μ-OOCCH 3 ) 8 (LH 2 ) 4 ]·(OH) 2 · x H 2 O. Single crystal X-ray diffraction studies of these complexes reveal that their central metallic core consists of two tetranuclear [Ni 2 Ln 2 O 4 ] cubane subunits fused together by acetate and hydroxide bridges. The magnetic study of these complexes reveals a ferromagnetic interaction between the Ln III and the Ni II center. The magnitude of exchange coupling between the Ni II and Ln III center, parametrized from the magnetic data of the Gd analogue, gives J = +0.86 cm -1 . The magneto caloric effect, studied for the Ni II 4 Gd III 4 complex, shows a maximum of magnetic entropy change, -Δ S m = 22.58 J kg -1 K -1 at 3 K for an applied external field of 5 T., Competing Interests: The authors declare no competing financial interest.

Published
2018
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