Publications by authors named "Todd Barkman"

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A record-setting mitogenome in the holoparasitic plant Balanophora yakushimensis accompanied by exceptional loss of organellar DNA repair and recombination genes.
Runxian Yu, Xueke Zhi, Luis Federico Ceriotti, Elizabeth Skippington, Danny W Rice, Todd J Barkman

BMC Biol· November 2025

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Dehydrogenases in the Flavoprotein Amine Oxidoreductase Superfamily.
Javeria Akram, Tavishi Budagavi, Zhiyao Zhang, Morgan Fowler, Andrew J Gaunt, Todd J Barkman

Biochemistry· July 2025

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Ancestral evolution of oxidase activity in a class of (S)-nicotine and (S)-6-hydroxynicotine-degrading flavoenzymes.
Zhiyao Zhang, Parth R Bandivadekar, Andrew J Gaunt, Surl-Hee Ahn, Todd J Barkman

J Biol Chem· July 2025

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Yerba mate () genome provides new insights into convergent evolution of caffeine biosynthesis.
Federico A Vignale, Andrea Hernandez Garcia, Carlos P Modenutti, Ezequiel J Sosa, Lucas A Defelipe, Todd J Barkman

Elife· January 2025

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Applications of ancestral sequence reconstruction for understanding the evolution of plant specialized metabolism.
Todd J Barkman

Philos Trans R Soc Lond B Biol Sci· November 2024

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The Mutational Road not Taken: Using Ancestral Sequence Resurrection to Evaluate the Evolution of Plant Enzyme Substrate Preferences.
Emily M Catania, Nicole M Dubs, Shejal Soumen, Todd J Barkman

Genome Biol Evol· February 2024

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Analysis of histidine-tagged recombinant proteins from nickel and copper coated surfaces by direct electrospray ionization and desorption electrospray ionization mass spectrometry.
Roshan Javanshad, Christopher James Taylor, Niusha Delavari, Todd J Barkman, Frederick Stull

Rapid Commun Mass Spectrom· September 2023

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The enzyme pseudooxynicotine amine oxidase from Pseudomonas putida S16 is not an oxidase, but a dehydrogenase.
Vishakha Choudhary, Kevin Wu, Zhiyao Zhang, Mark Dulchavsky, Todd Barkman

J Biol Chem· August 2022

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A Collaborative Classroom Investigation of the Evolution of SABATH Methyltransferase Substrate Preference Shifts over 120 My of Flowering Plant History.
Nicole M Dubs, Breck R Davis, Victor de Brito, Kate C Colebrook, Ian J Tiefel, Todd J Barkman

Mol Biol Evol· March 2022

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Lifetime stress and war exposure timing may predict methylation changes at NR3C1 based on a pilot study in a warrior cohort in a small-scale society in Kenya.
Bilinda Straight, Georgiana Fisher, Belinda L Needham, Amy Naugle, Charles Olungah, Todd Barkman

Am J Hum Biol· July 2021

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Convergent Biochemical Pathways for Xanthine Alkaloid Production in Plants Evolved from Ancestral Enzymes with Different Catalytic Properties.
Andrew J O'Donnell, Ruiqi Huang, Jessica J Barboline, Todd J Barkman

Mol Biol Evol· June 2021

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Prosocial Emotion, Adolescence, and Warfare : DNA Methylation Associates with Culturally Salient Combat Variables.
Bilinda Straight, Belinda L Needham, Georgiana Onicescu, Puntipa Wanitjirattikal, Todd Barkman

Hum Nat· June 2019

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Novel genetic code and record-setting AT-richness in the highly reduced plastid genome of the holoparasitic plant .
Huei-Jiun Su, Todd J Barkman, Weilong Hao, Samuel S Jones, Julia Naumann

Proc Natl Acad Sci U S A· January 2019

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Reading between the vines: Hosts as islands for extreme holoparasitic plants.
Todd J Barkman, Matthew R Klooster, Keith D Gaddis, Brian Franzone, Sondra Calhoun

Am J Bot· September 2017

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Comparative mitogenomics indicates respiratory competence in parasitic Viscum despite loss of complex I and extreme sequence divergence, and reveals horizontal gene transfer and remarkable variation in genome size.
Elizabeth Skippington, Todd J Barkman, Danny W Rice, Jeffrey D Palmer

BMC Plant Biol· February 2017

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Miniaturized mitogenome of the parasitic plant Viscum scurruloideum is extremely divergent and dynamic and has lost all nad genes.
Elizabeth Skippington, Todd J Barkman, Danny W Rice, Jeffrey D Palmer

Proc Natl Acad Sci U S A· July 2015

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Enzyme functional evolution through improved catalysis of ancestrally nonpreferred substrates.
Ruiqi Huang, Frank Hippauf, Diana Rohrbeck, Maria Haustein, Katrin Wenke, Todd J Barkman

Proc Natl Acad Sci U S A· February 2012

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Elucidating the evolutionary history of the Southeast Asian, holoparasitic, giant-flowered Rafflesiaceae: pliocene vicariance, morphological convergence and character displacement.
Mika Bendiksby, Trond Schumacher, Galina Gussarova, Jamili Nais, Kamarudin Mat-Salleh, Todd Barkman

Mol Phylogenet Evol· November 2010

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Enzymatic, expression and structural divergences among carboxyl O-methyltransferases after gene duplication and speciation in Nicotiana.
Frank Hippauf, Elke Michalsky, Ruiqi Huang, Robert Preissner, Todd J Barkman

Plant Mol Biol· February 2010

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Evidence for escape from adaptive conflict?
Todd Barkman, Jianzhi Zhang

Nature· December 2009

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Accelerated rates of floral evolution at the upper size limit for flowers.
Todd J Barkman, Mika Bendiksby, Seok-Hong Lim, Kamarudin Mat Salleh, Jamili Nais

Curr Biol· October 2008

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Mitochondrial DNA suggests at least 11 origins of parasitism in angiosperms and reveals genomic chimerism in parasitic plants.
Todd J Barkman, Joel R McNeal, Seok-Hong Lim, Gwen Coat, Henrietta B Croom

BMC Evol Biol· December 2007

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Positive selection for single amino acid change promotes substrate discrimination of a plant volatile-producing enzyme.
Todd J Barkman, Talline R Martins, Elizabeth Sutton, John T Stout

Mol Biol Evol· June 2007

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Comparative genomic analyses of frog virus 3, type species of the genus Ranavirus (family Iridoviridae).
Wendy G H Tan, Todd J Barkman, V Gregory Chinchar, Karim Essani

Virology· May 2004

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