Publications by authors named "Rao Sethumadhavan"

The original version of this article unfortunately contained errors in Fig. 4a. Representative image of b-actin of brain region were copied incorrectly during the preparation of the figures.

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The major candidate for multiple sulfatase deficiency is a defective formylglycine-generating enzyme (FGE). Though adequately produced, mutations in FGE stall the activation of sulfatases and prevent their activity. Missense mutations, viz.

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BCR-ABL protein is one of the most potent target to treat chronic myeloid leukemia (CML). Apart from other mutations, T315I is especially challenging as it confers resistance to all first- and second-generation tyrosine kinase inhibitors. So, a thorough study of altered behavior upon mutation is crucially needed.

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Mutations in Cu/Zn superoxide dismutase 1 (SOD1) protein are a major cause of the devastating neurodegenerative disorder Amyotrophic lateral sclerosis. Evidence suggests that SOD1 functions as a free radical scavenger in humans. However, neither the mechanism nor a cure for this neurodegenerative disease are yet known.

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Article Synopsis
  • A missense mutation (L270P) in the Wiskott-Aldrich syndrome protein (WASP) leads to its constant activation, contributing to the development of X-linked neutropenia (XLN).
  • Using all atom molecular dynamics (MD) simulations, researchers studied the structural changes in the mutated WASP, observing increased flexibility and reduced intra-molecular hydrogen bonding.
  • The decreased hydrogen bonds impair the protein's local folding, causing it to adopt a more unfolded state that enhances bonding with Cdc42, its interacting partner, due to increased conformational variability.
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Oral administration of low doses of cypermethrin to pregnant Wistar rats led to a dose-dependent differences in the induction of xenobiotic-metabolizing cytochrome P450s (CYPs) messenger RNA (mRNA) and protein in brain regions isolated from the offsprings postnatally at 3 weeks that persisted up to adulthood. Similar alterations were observed in the expression of rate-limiting enzymes of neurotransmitter synthesis in brain regions of rat offsprings. These persistent changes were associated with alterations in circulating levels of growth hormone (GH), cognitive functions, and accumulation of cypermethrin and its metabolites in brain regions of exposed offsprings.

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Oral administration of low doses (1.25, 2.5, or 5 mg/kg) of cypermethrin to pregnant Wistar rats from gestation days 5 to 21 led to dose-dependent differences in the induction of cytochrome P450 2D1 (CYP2D1) and 3A1 messenger RNA (mRNA) and protein in brain regions isolated from the offsprings postnatally at 3 weeks that persisted up to adulthood (12 weeks).

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Amyotrophic lateral sclerosis 6 (ALS6) is an autosomal recessive disorder caused by heterozygous mutation in the Fused in Sarcoma (FUS) gene. ALS6 is a neurodegenerative disorder, which affects the upper and lower motor neurons in the brain and spinal cord, resulting in fatal paralysis. ALS6 is caused by the genetic mutation in the proline/tyrosine-nuclear localization signals of the Fused in sarcoma Protein (FUS).

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Centrosomes are the vital component of cell cycle progression pathway. Recent investigations have suggested their role in regulating the immune response system. Centrosome polarization delivers secretory granules to the immunological synapse (IS).

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Genome sequencing has overflowed the databases with huge amount of SNP data. Although the amount of detected single nucleotide polymorphisms (SNPs) is rising exponentially every day, we still lag behind in characterization techniques. Implementing computational platforms to determine the pathogenecity associated with the SNPs can provide a probable solution to this problem.

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AKT1, a serine/threonine-protein kinase also known as AKT kinase, is involved in the regulation of various signalling downstream pathways including metabolism, cell proliferation, survival, growth, and angiogenesis. The AKT kinases pathway stands among the most important components of cell proliferation mechanism. Several approaches have been implemented to design an efficient drug molecule to target AKT kinases, although the promising results have not been confirmed.

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Among non-communicable diseases, cardiovascular disease (CVD) is claimed to be the leading cause of death worldwide. The chemokine (C-C Motif) receptor 5 (CCR5) gene has a strong association with the development of CVD and may culminate in myocardial infarction. In this study, its potential variations have been determined using molecular dynamics approach.

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The Polo-like kinases (Plks) are a conserved subfamily of serine-threonine protein kinases that have significant roles in cell proliferation. The serine/threonine protein kinases or polo-like kinase 1 (PLK1) exist in centrosome during interphase and is an important regulatory enzyme in cell cycle progression during M phase. Mutations in mammalian PLK1 were found to be over expressed in various human cancers and it is disrupting the binding ability of polo box domain with target peptide.

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Ras-related C3 botulinum toxin substrate 1 (RAC1) is a plasma membrane-associated small GTPase which cycles between the active GTP-bound and inactive GDP-bound states. There is wide range of evidences indicating its active participation in inducing cancer-associated phenotypes. RAC1 F28L mutation (RAC(F28L)) is a fast recycling mutation which has been implicated in several cancer associated cases.

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The computational approaches in determining disease-associated Non-synonymous single nucleotide polymorphisms (nsSNPs) have evolved very rapidly. Large number of deleterious and disease-associated nsSNP detection tools have been developed in last decade showing high prediction reliability. Despite of all these highly efficient tools, we still lack the accuracy level in determining the genotype-phenotype association of predicted nsSNPs.

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Genetic evolution corresponds to various biochemical changes that are vital development of new functional traits. Phylogenetic analysis has provided an important insight into the genetic closeness among species and their evolutionary relationships. Centromere-associated protein-E (CENP-E) protein is vital for maintaining cell cycle and checkpoint signal mechanisms are vital for recruitment process of other essential kinetochore proteins.

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Computational prediction of disease-associated non-synonymous polymorphism (nsSNP) has provided a significant platform to filter out the pathological mutations from large pool of SNP datasets at a very low cost input. Several methodologies and complementary protocols have been previously implemented and has provided significant prediction results. Although the previously implicated prediction methods were capable of investigating the most likely deleterious nsSNPs, but due to the lack of genotype-phenotype association analysis, the prediction results lacked in accuracy level.

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CK1δ (Casein kinase I isoform delta) is a member of CK1 kinase family protein that mediates neurite outgrowth and the function as brain-specific microtubule-associated protein. ATP binding kinase domain of CK1δ is essential for regulating several key cell cycle signal transduction pathways. Mutation in CK1δ protein is reported to cause cancers and affects normal brain development.

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Members of the novel SH2-containing protein (NSP3) and Crk-associated substrate (p130Cas) protein families form a multi-domain signalling platforms that mediate cell signalling process. We analysed the damaging consequences of three mutations, each from NSP3 (NSP3(L469R), NSP3(L623E), NSP3(R627E)) and p130Cas (p130Cas(F794R), p130Cas(L787E), p130Cas(D797R)) protein with respect to their native biological partners. Mutations depicted notable loss in interaction affinity towards their corresponding biological partners.

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Centrosome forms the backbone of cell cycle progression mechanism. Recent debates have occurred regarding the essentiality of centrosome in cell cycle regulation. CEP family protein is the active component of centrosome and plays a vital role in centriole biogenesis and cell cycle progression control.

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Oral administration of low doses (1.25 or 2.5 or 5 mg/kg) corresponding to 1/200th or 1/100th or 1/50th of LD50 of cypermethrin, a synthetic type II pyrethroid, to pregnant Wistar rats from gestation day 5 to 21 produced a dose-dependent increase in the expression of xenobiotic metabolizing cytochrome P450 (CYP) 1A-, 2B- and 2E1 in the brain and liver of offsprings postnatally at 3 weeks that persisted up to 12 weeks.

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Centrosomes are the key-regulating element of cell cycle progression. Aberrations in their functional mechanism lead to several cancer-related disorders. Aurora A protein is a centrosome-associated protein that regulates the centriole duplication and its abberations are associated with multiple cases of aneuploidy and cancer-related disorders.

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Determining the deleterious non-synonymous single nucleotide polymorphisms (nsSNPs), that might be involved in inducing disease-associated phenomena, is now among the most important field of computational genomic research. The rapid evolution in sequencing technologies has now outranged the limit of available sequence databases and has out-fledged the amount of SNP data that are yet to be characterized. In this article we have performed a comprehensive analysis of deleterious nsSNPs in MyH7 gene associated with cardiomyopathy cases using a set of computational platforms.

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