Bacterial Cell Division and Peptidoglycan Dynamics

Bacterial proliferation relies upon an exquisitely coordinated series of events that culminate in cell division and the remodelling of the peptidoglycan sacculus. Division begins with assembly of the Z-ring, formed by the tubulin homologue FtsZ, which recruits a suite of accessory proteins into the divisome complex. This machinery orchestrates the insertion of new peptidoglycan strands by penicillin-binding proteins, balanced by hydrolases that cleave existing bonds to allow septum formation and daughter-cell separation. Alongside septal constriction, the actin homologue MreB guides lateral cell-wall synthesis, maintaining rod-like morphology through curvature-dependent motion. Outer-membrane lipoproteins fine-tune transpeptidase activity, ensuring envelope integrity during constriction, while autolysins modulate hydrolysis to prevent lysis. Dynamic regulation of these processes underpins morphological diversity, influences antibiotic susceptibility and drives global patterns of bacterial survival in diverse environments. Understanding the interplay between cytoskeletal scaffolds, synthetic enzymes and hydrolytic factors is therefore central to both fundamental microbiology and the development of novel antimicrobial strategies.

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Bacterial Cell Division and Peptidoglycan Dynamics publication trend

The graph below shows the total number of articles in bacterial cell division and peptidoglycan dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Peptidoglycan: A mesh-like polymer of glycan strands cross-linked by peptides, forming the bacterial cell wall that confers shape and rigidity.

Divisome: A multi-protein complex assembled at mid-cell that drives septum formation and cell division.

FtsZ: A tubulin-like GTPase that polymerises into a Z-ring, serving as a scaffold for divisome assembly.

MreB: An actin homolog that forms filaments beneath the cell membrane, directing lateral peptidoglycan synthesis and determining cell shape.

Transpeptidase: An enzyme activity of penicillin-binding proteins that catalyses peptide cross-linking within peptidoglycan.

Autolysin: A cell-wall hydrolase that cleaves peptidoglycan bonds to permit growth, division and remodelling.

References

1. Architecture of the ring formed by the tubulin homologue FtsZ in bacterial cell division. eLife (2014).
2. MreB filaments align along greatest principal membrane curvature to orient cell wall synthesis. eLife (2018).
3. Regulation of Peptidoglycan Synthesis by Outer-Membrane Proteins. Cell (2010).
4. Coordination of peptidoglycan synthesis and outer membrane constriction during Escherichia coli cell division. eLife (2015).
5. Cell Wall Hydrolases in Bacteria: Insight on the Diversity of Cell Wall Amidases, Glycosidases and Peptidases Toward Peptidoglycan. Frontiers in Microbiology (2019).