Author

Brian K. Hammer

Georgia Institute of TechnologyORCID 0000-0002-3767-6034Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Microbiology· 3 Biophysics· 1

Signature Assays, Organisms & Methods

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Approach:experimental assay· 3 Organism:bacteria (other)· 2 Assay:whole-genome sequencing· 2 Research Focus:benchmarking· 1 Research Focus:cell-cell communication· 1 Research Focus:database / resource· 1 Research Focus:gene regulatory network inference· 1 Research Focus:host-pathogen & immune response· 1

Frequent Co-Authors

Christopher ZhangiD· 3 shared Peter J. YunkeriD· 2 shared Raymond CopelandiD· 2 shared Aawaz R. Pokhrel· 1 shared Gabi SteinbachiD· 1 shared Hayley HassleriD· 1 shared Isabel K. CalimlimiD· 1 shared Lauren SpeareiD· 1 shared

Activity by Year

2025-2026 · peak 2/yr

Co-Author Collaboration Network

10 top collaborators · 19 mutual co-author links

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Focal author (center)Selected co-authorORCID co-authorUnlinked name

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3 shared papersMicrobiology

Christopher ZhangORCID

Mutual co-authors in cluster

Author profile →

4 papers

Recent·Most cited

41% of Gram-negative bacteria encode a Type Six Secretion System

Christopher Zhang, Hayley Hassler, William Ratcliff, Lauren Speare, Brian K Hammer

The paper quantifies T6SS prevalence in Gram-negative bacteria using genome analysis and finds it is present in 41% of well-sampled genera.

bioRxiv · Nov 9, 2026 · PreprintMicrobiology

Establishing genetic tractability in Jeongeupia sacculi HS-3: disruption of rpoS hinders biofilm formation

Zachary Beddingfield, Isabel K. Calimlim, Christopher Zhang, Brian K. Hammer

This study establishes genetic tractability in Jeongeupia sacculi HS-3 by disrupting rpoS, showing it regulates biofilm formation under low-nutrient conditions but not general stress survival.

bioRxiv · Oct 10, 2026 · PreprintMicrobiology

Higher levels of antibiotic resistance are less competitive: the hidden ecological cost of no-metabolic cost resistance

Miles T. Wetherington, Raymond Copeland, Christopher Zhang, Brian K. Hammer, Peter J. Yunker

This study shows that highly antibiotic-resistant bacteria can inadvertently help susceptible strains survive, revealing an ecological cost to extreme resistance that limits its spread.

bioRxiv · Dec 15, 2025 · PreprintMicrobiology

Cell-substrate friction controls biofilm development

Aawaz R. Pokhrel, Raymond Copeland, Maryam Hejri, Tom E. R. Belpaire, Gabi Steinbach, Siu Lung Ng, Brian K. Hammer, Peter J. Yunker

This study shows that increasing cell-substrate friction increases biofilm contact angle and decreases horizontal expansion rate.

bioRxiv · Jul 11, 2025 · PreprintBiophysics