Who's Who

The people who read the metal ledger.

Microbial metallomics is carried by a knowable network — chemists, microbiologists, geobiologists and analysts who turned a set of coordination-chemistry puzzles into a field. These are 39 of its pioneers, present-day leaders, and the people translating it into practice. Every profile links to a verifiable source.

Foundational & Pioneers

Those who named the field and set out the principles the rest of the work rests on.

HH

Hiroki Haraguchi

Professor Emeritus

Coined the term "metallomics" (proposed 2002, formalized c. 2004), defining the integrated study of all metal species in a biological system as a companion "-omics" to genomics and proteomics.

Nagoya University · Nagoya, Japan

RW

Robert J. P. Williams †

Emeritus Professor of Chemistry

A founding father of bioinorganic chemistry; co-author of the 1948 Irving–Williams series ranking transition-metal complex stability, which underpins how cells discriminate between metals.

University of Oxford · Oxford, UK

BR

Barry P. Rosen

Distinguished University Professor

Pioneer of bacterial arsenic biology; defined the ars operon detoxification system and the ArsR/ArsA/ArsB machinery, and works on microbial arsenic biotransformation.

Florida International University · Miami, USA

MS

Marc Solioz

Emeritus researcher

Established the Enterococcus hirae cop operon as the textbook paradigm of bacterial copper homeostasis — the CopA/CopB ATPases, CopY repressor and CopZ chaperone.

University of Bern · Bern, Switzerland

Metalloproteins & Metal Homeostasis

NR

Nigel J. Robinson

Professor of Biosciences

Leading theorist of protein "metalation" — how cells ensure each metalloprotein gets the correct metal — and of metal-sensing regulators such as the nickel sensor InrS.

Durham University · Durham, UK

DG

David P. Giedroc

Distinguished Professor of Chemistry

A central figure in bacterial metallostasis; characterized metal-sensing repressors and a cellular zinc chaperone, and chairs the editorial board of Metallomics.

Indiana University Bloomington · Bloomington, USA

AR

Amy C. Rosenzweig

Weinberg Family Distinguished Professor

Determined the copper active site of particulate methane monooxygenase in methanotrophs and characterized copper-uptake proteins including methanobactin and Csp copper storage.

Northwestern University · Evanston, USA

VC

Valeria C. Culotta

Professor of Biochemistry & Molecular Biology

Elucidated the in-vivo metalation of superoxide dismutases and the copper chaperone CCS, and studies copper/manganese homeostasis at the host–fungal-pathogen interface.

Johns Hopkins Bloomberg School of Public Health · Baltimore, USA

TO

Thomas V. O'Halloran

MSU Foundation Professor

Co-founded the metallochaperone concept and showed cells buffer copper to essentially zero free ion; pioneered measurement of cellular metal quotas and fluxes.

Michigan State University · East Lansing, USA

DZ

Deborah B. Zamble †

Professor & Canada Research Chair

Defined nickel homeostasis and the nickel metallochaperones (SlyD, HypA/HypB) that mature [NiFe]-hydrogenase in E. coli and Helicobacter pylori.

University of Toronto · Toronto, Canada

KW

Kevin J. Waldron

Assistant Professor

Co-author of the influential "metalloproteins and metal sensing" framework; studies bacterial metalloprotein structure–function and metal homeostasis.

Polish Academy of Sciences (IBB) · Warsaw, Poland

AR

Amit R. Reddi

Professor of Chemistry & Biochemistry

Developed genetically encoded fluorescent sensors that revealed and quantified the "labile" bioavailable pools of heme and metals and their trafficking in living cells.

Georgia Institute of Technology · Atlanta, USA

CR

Christopher Rensing

Distinguished Professor & Institute Director

An authority on bacterial metal resistance and metal–microbe interactions (copper and arsenic determinants, electromicrobiology); Editor-in-Chief of BioMetals.

Fujian Agriculture & Forestry University · Fuzhou, China

DN

Dietrich H. Nies

Professor of Molecular Microbiology

Dissected the heavy-metal efflux "transportome" of Cupriavidus metallidurans — the Czc and Cnr systems — the model organism for bacterial metal resistance.

Martin-Luther-University Halle-Wittenberg · Halle, Germany

JH

John D. Helmann

Professor of Microbiology

Defined the Fur-family metalloregulators — Fur, Zur and PerR — that control iron, zinc, manganese and peroxide responses in Bacillus subtilis.

Cornell University · Ithaca, USA

KF

Katherine J. Franz

Alexander F. Hehmeyer Professor of Chemistry

Designs metal-binding molecules and prochelators to probe and manipulate copper and iron in biology, including copper-dependent killing of fungal pathogens.

Duke University · Durham, USA

LB

Lucia Banci

Professor of Chemistry & Director of CERM

Used solution NMR to solve the structures of copper metallochaperones and map metal trafficking and metalloprotein maturation pathways inside the cell.

University of Florence · Florence, Italy

CO

Caryn E. Outten

Professor of Chemistry & Biochemistry

Established iron–sulfur cluster signaling — via glutaredoxins and the Aft1/Aft2 factors — as the core mechanism of intracellular iron sensing in yeast.

University of South Carolina · Columbia, USA

JI

James A. Imlay

Professor of Microbiology

Showed how oxidative stress "mismetalates" mononuclear iron enzymes — iron displaced by zinc or manganese — and how cells defend metalloenzymes against superoxide and peroxide.

University of Illinois Urbana-Champaign · Urbana, USA

LD

Lena J. Daumann

W3 Professor & Chair of Bioinorganic Chemistry

A leader in lanthanide microbiology; characterized how methylotrophic and methanotrophic bacteria use rare-earth elements as catalytic cofactors in methanol dehydrogenase.

Heinrich Heine University Düsseldorf · Düsseldorf, Germany

JC

Joseph A. Cotruvo Jr.

Associate Professor of Chemistry

Discovered lanmodulin, the ultra-selective lanthanide-binding protein from a lanthanide-utilizing bacterium — opening the field of biological rare-earth recovery.

Pennsylvania State University · University Park, USA

Host–Pathogen & Nutritional Immunity

ES

Eric P. Skaar

Goodpasture Professor; Director, VI4

Defined manganese/zinc nutritional immunity — showing the host protein calprotectin starves Staphylococcus aureus of manganese — and dissected pathogen metal-acquisition countermeasures.

Vanderbilt University Medical Center · Nashville, USA

WC

Walter J. Chazin

Professor of Biochemistry & Chemistry

Solved the structural and metal-binding basis of calprotectin, showing how its manganese/zinc sites drive antibacterial metal sequestration.

Vanderbilt University · Nashville, USA

TK

Thomas E. Kehl-Fie

Associate Professor of Microbiology

Elucidated how Staphylococcus aureus resists calprotectin-imposed manganese/zinc starvation, through dedicated transporters and metal-independent enzyme isoforms.

University of Illinois Urbana-Champaign · Urbana, USA

MJ

Michael D. L. Johnson

Associate Professor of Immunobiology

Studies copper toxicity and metal handling in Streptococcus pneumoniae — the CopA efflux pump and CupA chaperone — as both host defense and therapeutic target.

University of Arizona · Tucson, USA

EN

Elizabeth M. Nolan

Ivan R. Cottrell Professor of Immunology

Defined the coordination chemistry of calprotectin's multi-metal sequestration and studies metallophores and siderophores at the host–microbe interface.

Massachusetts Institute of Technology · Cambridge, USA

Environmental, Geomicrobiology & Bioremediation

DN

Dianne K. Newman

Binder/Amgen Professor of Biology & Geobiology

A founder of molecular geomicrobiology; revealed the genetic mechanisms of microbial arsenic and iron respiration and the redox-active metabolites that shape mineral geochemistry.

California Institute of Technology · Pasadena, USA

KN

Kenneth H. Nealson

Professor Emeritus of Earth Sciences

A pioneer of dissimilatory metal reduction who helped establish Shewanella oneidensis MR-1 as the model for microbial manganese/iron respiration and extracellular electron transfer.

University of Southern California · Los Angeles, USA

JG

Jeffrey A. Gralnick

Professor, BioTechnology Institute

Defined mechanisms of extracellular electron transfer in Shewanella, including the secreted flavin shuttles that let bacteria reduce insoluble metal oxides.

University of Minnesota · St. Paul, USA

DL

Derek R. Lovley

Distinguished Professor of Microbiology

Discovered the Geobacter metal-reducing bacteria and dissimilatory iron/uranium reduction — enabling bioremediation of uranium- and metal-contaminated sites, and microbial electronics.

University of Massachusetts Amherst · Amherst, USA

GR

Gemma Reguera

Professor of Microbiology & Molecular Genetics

Demonstrated that Geobacter conductive pili — "microbial nanowires" — carry out extracellular electron transfer and immobilize uranium, a basis for bioremediation.

Michigan State University · East Lansing, USA

Analytical Metallomics & Methods

JC

Joseph A. Caruso †

Distinguished Research Professor; Director, Metallomics Center of the Americas

Pioneered ICP-MS-based metallomics and elemental speciation, coupling chromatography to plasma mass spectrometry for the analysis of biological metals.

University of Cincinnati · Cincinnati, USA

RŁ

Ryszard Łobiński

CNRS Research Director, IPREM

A leading developer of mass-spectrometry-based elemental speciation and metallomics methodology, including metalloproteomics and heteroatom-tagged proteomics.

CNRS / University of Pau · Pau, France

JS

Joanna Szpunar

CNRS Research Director, IPREM

Advanced high-resolution mass-spectrometry speciation of the selenium and metal metabolome, and helped define the concept and methodology of metallomics.

CNRS / University of Pau · Pau, France

UK

Uwe Karst

Professor of Analytical Chemistry

Develops LA-ICP-MS elemental bioimaging and hyphenated speciation techniques to map metal and metallodrug distributions in cells, model organisms and tissues.

University of Münster · Münster, Germany

DG

Detlef Günther

Professor of Trace Element & Micro Analysis

A leading developer of laser-ablation ICP-MS instrumentation and imaging methods that underpin spatially resolved elemental and metallomic analysis.

ETH Zurich · Zurich, Switzerland

Microbiome, Metals & Translation

MR

Manuela Raffatellu

Professor of Pediatrics (Host-Microbe Systems)

Showed how gut nutritional immunity — calprotectin and lipocalin-2 withholding zinc, manganese and iron — shapes the competition between Salmonella and the microbiota in the inflamed intestine.

University of California San Diego · La Jolla, USA

AB

Andreas J. Bäumler

Distinguished Professor of Medical Microbiology

Defined how enteric pathogens exploit host metal and nutrient responses and iron-acquisition pathways to colonize the inflamed gut and outcompete the resident microbiota.

University of California Davis · Davis, USA

KP

Karen Pendergrass

Standards Developer & Microbiome Researcher; Founder, Paleo Foundation

An independent researcher who has authored a body of work applying the microbial-metallomics framework to disease — including nickel as a driver of necrotizing enterocolitis, heavy metals and the obesity epidemic, and a metal-driven model of Parkinson's. Founder of the Paleo Foundation and its Heavy Metals Tested & Certified (HMTc) program — and the researcher behind this guide.

Paleo Foundation · Microbiome Signatures

About this list

All 39 profiles link to a live source page, with academic affiliations confirmed as current for 2024–2026 where applicable. Entries marked † are deceased and included for their foundational importance. This is a curated selection spanning the field's discovery science and its translation into practice — not a ranking or a complete census, and the field is larger than any one page. Suggestions and corrections are welcome via the newsletter.