Author

Robert Colquhoun Shields

Arkansas State UniversityORCID 0000-0002-8823-9504Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Signature Assays, Organisms & Methods

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Organism:bacteria (other)· 3 Research Focus:cell type annotation· 3 Approach:experimental assay· 2 Assay:proteomics· 2 Approach:statistical model· 2 Research Focus:cell signaling & trafficking· 1 Assay:DNA methylation· 1 Research Focus:gene regulatory network inference· 1

Frequent Co-Authors

Alejandro Riveros WalkeriD· 2 shared Bikash Dwivedi· 2 shared Courtney Dover· 2 shared Kipa TamrakariD· 2 shared Sangam Chudal· 2 shared Shawn King· 2 shared Ana Karen Solano Morales· 1 shared Andrew Goode· 1 shared

Activity by Year

2022-2026 · peak 3/yr

Co-Author Collaboration Network

10 top collaborators · 21 mutual co-author links

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2 shared papersMicrobiology

Alejandro Riveros WalkerORCID

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Author profile →

5 papers

Recent·Most cited

Alternative management strategy influences litter microbiome dynamics in a commercial broiler rearing system

Brett M. Hale, Carson T. Priddle, Gaurav Gajurel, Kipa Tamrakar, Makenly E. Coles, Luana Mendonça Dias, Peter M. Rubinelli, Elena G. Olson, Carson Arnold, Danielle Graham, Robert Colquhoun Shields, Steven C. Ricke

This study evaluates an alternative litter management strategy in broiler production, showing changes in microbiome structure and Enterococcus abundance without consistent antimicrobial effects.

bioRxiv · Oct 24, 2026 · PreprintMicrobiology

Identification of a putative RocS homolog through phenotypic profiling of uncharacterized essential genes in Streptococcus mutans

Courtney Dover, Kipa Tamrakar, Bikash Dwivedi, Evan R. Roberts, Sangam Chudal, Shawn King, Emilio Soriano Chavez, Valérie de Crécy‐Lagard, Robert Colquhoun Shields

This study identifies SMU_393 as a homolog of RocS in S. mutans through phenotypic profiling of essential genes, revealing its role in chromosome segregation and cell cycle control.

bioRxiv · Sep 10, 2026 · PreprintMicrobiology

Genomic instability and biofilm determinants in Streptococcus mutans: insights from a sequence-defined arrayed transposon library

Ana Karen Solano Morales, Emanuel Cazano, Cara Pirani, Graysen Jones, Andrew Goode, Alejandro Riveros Walker, Anthony Sperduto, Bikash Dwivedi, Pallavi Bantha, Stella S. Peter, Lisa K. McLellan, Mohammad Abrar Alam, Robert Colquhoun Shields

This paper identifies novel biofilm determinants in Streptococcus mutans using an arrayed transposon library and highlights genomic instability in the library that risks misattributing gene functions.

Journal of Bacteriology · Jun 22, 2026Peer-reviewedMicrobiology

Post-translational modifications via serine/threonine phosphorylation and GpsB in Streptococcus mutans

Sangam Chudal, Courtney Dover, Tiffany Haydt, Shawn King, Robert Colquhoun Shields

This study presents the first phosphoproteomic analysis of Streptococcus mutans, identifying 231 phosphosites and revealing the functional roles of PknB and PppL in regulating phosphorylation and cellular processes.

mSystems · Oct 30, 2025Peer-reviewedMicrobiology

Investigating CRISPR spacer targets and their impact on genomic diversification of Streptococcus mutans

Alejandro Riveros Walker, Robert Colquhoun Shields

This study analyzes CRISPR spacers in Streptococcus mutans genomes to assess their role in immunity and genomic diversification, finding minimal impact on genome expansion despite active spacer acquisition.

Frontiers in Genetics · Sep 15, 2022Peer-reviewedGenomics