Pathway of human AS3MT arsenic methylation

DS Dheeman, C Packianathan, JK Pillai… - Chemical research in …, 2014 - ACS Publications
A synthetic gene encoding human As (III) S-adenosylmethionine (SAM) methyltransferase
(hAS3MT) was expressed, and the purified enzyme was characterized. The synthetic …

Identification and structural characterization of novel cyclotide with activity against an insect pest of sugar cane

MFS Pinto, ICM Fensterseifer, L Migliolo… - Journal of Biological …, 2012 - jbc.org
Cyclotides are a family of plant-derived cyclic peptides comprising six conserved cysteine
residues connected by three intermolecular disulfide bonds that form a knotted structure …

Arsenic methylation by a novel ArsM As(III) S‐adenosylmethionine methyltransferase that requires only two conserved cysteine residues

K Huang, Y Xu, C Packianathan, F Gao… - Molecular …, 2018 - Wiley Online Library
Arsenic (As) biomethylation is an important component of the As biogeochemical cycle that
can influence As toxicity and mobility in the environment. Biomethylation of As is catalyzed …

PDE4 inhibitor eliminates breast cancer stem cells via noncanonical activation of mTOR

P Mukherjee, A Bagchi, A Banerjee… - Journal of cellular …, 2022 - Wiley Online Library
Ineffective cancer treatment is implicated in metastasis, recurrence, resistance to
chemotherapy and radiotherapy, and evasion of immune surveillance. All these failures …

Quorum quenching activity of pentacyclic triterpenoids leads to inhibition of biofilm formation by Acinetobacter baumannii

S Paul Bhattacharya, A Mitra, A Bhattacharya, A Sen - Biofouling, 2020 - Taylor & Francis
The quorum quenching (QQ) potential of three pentacyclic triterpenoids, glycyrrhetinic acid
(GRA), ursolic acid (UA) and betulinic acid (BA), representing distinct groups of compounds …

A disulfide-bond cascade mechanism for arsenic (III) S-adenosylmethionine methyltransferase

K Marapakala, C Packianathan, AA Ajees… - Biological …, 2015 - journals.iucr.org
Methylation of the toxic metalloid arsenic is widespread in nature. Members of every
kingdom have arsenic (III) S-adenosylmethionine (SAM) methyltransferase enzymes, which …

The Structure of an As(III) S-Adenosylmethionine Methyltransferase with 3-Coordinately Bound As(III) Depicts the First Step in Catalysis

C Packianathan, P Kandavelu, BP Rosen - Biochemistry, 2018 - ACS Publications
Arsenic is a ubiquitous environmental toxic substance and a Class 1 human carcinogen.
Arsenic methylation by the enzyme As (III) S-adenosylmethionine (SAM) methyltransferase …

Functional characterization of the methylarsenite‐inducible arsRM operon from Noviherbaspirillum denitrificans HC18

J Zhang, J Chen, YF Wu, X Liu… - Environmental …, 2022 - Wiley Online Library
Microbial arsenic methylation by arsenite (As (III)) S‐adenosylmethionine
methyltransferases (ArsMs) can produce the intermediate methylarsenite (MAs (III)), which is …

Genomewide Analysis of Mode of Action of the S-Adenosylmethionine Analogue Sinefungin in Leishmania infantum

A Bhattacharya, M Sharma, C Packianathan… - Msystems, 2019 - journals.asm.org
To further our understanding of one-carbon metabolism in the protozoan parasite
Leishmania, we conducted genomic screens to study how the parasite responded to …

Clustering protein environments for function prediction: finding PROSITE motifs in 3D

S Yoon, JC Ebert, EY Chung, G De Micheli… - BMC …, 2007 - Springer
Background Structural genomics initiatives are producing increasing numbers of three-
dimensional (3D) structures for which there is little functional information. Structure-based …