The bacterial cell wall in the domain Bacteria is composed of a rigid, tight-knit molecular complex called peptidoglycan. Peptidoglycan, also known as murein, is a vast polymer consisting of interlocking chains of identical peptidoglycan monomers. It functions to prevent bacterial osmotic lysis.
In order for bacteria to divide by binary fission and increase their size following division, links in the peptidoglycan must be broken, new peptidoglycan monomers must be inserted, and the peptide cross links must be resealed.
Transpeptidase enzymes reform the peptide cross-links between the rows and layers of peptidoglycan to make the wall strong.
Flash animation illustrating The Function of Transpeptidase
in Peptidoglycan Synthesis.swf by Gary E. Kaiser, Ph.D.
Professor of Microbiology,
The Community College of Baltimore County, Catonsville Campus
This work is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at http://faculty.ccbcmd.edu/~gkaiser/index.html.
Last updated: July, 2018
Please send comments and inquiries to Dr.
Gary Kaiser