{"id":15906,"date":"2025-06-16T12:37:10","date_gmt":"2025-06-16T16:37:10","guid":{"rendered":"https:\/\/cibmontreal.ca\/uncategorized\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\/"},"modified":"2025-10-01T15:58:59","modified_gmt":"2025-10-01T19:58:59","slug":"bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow","status":"publish","type":"post","link":"https:\/\/cibmontreal.ca\/en\/news\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\/","title":{"rendered":"Bacterial Shapeshifters: Surprising Flexibility in How Closely Related Bacteria Grow"},"content":{"rendered":"\n<p><strong>A new study from the Universit\u00e9 de Montr\u00e9al and collaborators has uncovered an unexpected diversity in how even closely related bacterial species elongate their cells, a fundamental process for their growth and survival. This discovery has significant implications for understanding bacterial evolution, adaptation, and could pave the way for new antibiotic strategies. <\/strong><\/p>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"348\" src=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/Brun_NatureComm1-1024x348.webp\" alt=\"\" class=\"wp-image-15891\" srcset=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/Brun_NatureComm1-1024x348.webp 1024w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/Brun_NatureComm1-300x102.webp 300w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/Brun_NatureComm1-768x261.webp 768w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/Brun_NatureComm1-1536x522.webp 1536w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/Brun_NatureComm1.webp 1714w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\" id=\"h-contexte\">Context<\/h2>\n\n<p>Bacteria exhibit a remarkable array of shapes and sizes, crucial for their different lifestyles and environments. A key process determining these shapes is cell elongation \u2013 how bacteria grow longer before they divide. For decades, scientists believed that the mechanisms driving cell elongation were largely conserved, especially among species that are close relatives on the evolutionary tree. Most of our understanding came from studying a few &#8220;model&#8221; bacterial species, leading to assumptions that others would behave similarly.   <\/p>\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"h-la-question\">The Problem to Solve<\/h2>\n\n<p>The research team, led by scientists at the Universit\u00e9 de Montr\u00e9al and the Institut Courtois d&#8217;innovation biom\u00e9dicale, questioned this long-held assumption. They aimed to investigate the diversity of cell elongation mechanisms in a group of closely related bacteria, the <em>Caulobacteraceae<\/em> family. The central question was: do these bacterial cousins all grow in the same way, or is there more variation \u2013 or &#8220;phenotypic plasticity&#8221; \u2013 than previously thought? Understanding this could reveal how bacteria adapt their growth strategies to different conditions and evolutionary pressures.   <\/p>\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"h-experimentations-un-apercu-des-chantiers-de-construction-bacteriens\"><strong>Experiments: A Glimpse into Bacterial Construction Sites<\/strong><\/h2>\n\n<p>To watch these tiny organisms grow, the researchers, spearheaded by first author Dr. Marie Delaby, a postdoctoral fellow at the University of Montreal, employed sophisticated imaging techniques using fluorescent D-amino acids (FDAAs). These FDAAs get incorporated into the bacterial cell wall wherever new cell wall material is being actively synthesized. By tracking where these fluorescent signals appeared over time, the scientists could map out the &#8220;construction sites&#8221; for cell elongation in different bacterial species.  <\/p>\n\n<p>They combined these cell imaging techniques with genetic analysis and phylogenetic (evolutionary relationship) studies. This multi-pronged approach allowed them to not only see how different species elongated but also to understand the genetic underpinnings and evolutionary context of these differences. <\/p>\n\n<p>Instead of a uniform method of elongation, even these closely related bacteria showed a startling variety of strategies. Some elongated from the middle outward in both directions, others only toward one end, and some began growing from one tip of the cell before switching to growth from midcell. These differences in where and how cells elongate highlight how flexible and diverse bacterial growth can be. They also investigated the localization of PBP2, a key protein involved in synthesizing the cell wall, and found that its position within the cell changed in ways that correlated with the different elongation modes. This suggested that the machinery responsible for cell growth is highly adaptable.<\/p>\n\n<p>\u00a0<\/p>\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion-une-nouvelle-appreciation-de-l-individualite-bacterienne\"><strong>Conclusion: A New Appreciation of Bacterial Individuality<\/strong><\/h2>\n\n<p>&#8220;This research might change our understanding of bacterial cell growth,&#8221; says Dr. Yves Brun, senior author of the study and Canada 150 Research Chair in Bacterial Cell Biology at the Universit\u00e9 de Montr\u00e9al and CI<sup>2<\/sup>B investigator. &#8220;We&#8217;ve shown that there&#8217;s a remarkable degree of phenotypic plasticity in how bacteria elongate, even among species we thought would be very similar. It&#8217;s clear that bacteria are much more flexible and diverse in their basic biological processes than previously appreciated.&#8221;<\/p>\n\n<h3 class=\"wp-block-heading\" id=\"h-pertinence-pour-la-sante-humaine\"><strong>Relevance to Human Health<\/strong><\/h3>\n\n<p>The mechanisms of bacterial cell wall synthesis and elongation are prime targets of some of our most effective antibiotics, such as penicillin. Discovering such unexpected diversity and plasticity in these fundamental processes has crucial implications for human health. <\/p>\n\n<p>&#8220;If different bacteria build their cell walls in varied ways, it means that antibiotics targeting these processes might have different levels of effectiveness against them,&#8221; explains Dr. Delaby. &#8220;Understanding this diversity is critical for developing new antibiotics and combating antibiotic resistance. By learning about these alternative growth strategies, we might be able to identify new, more specific targets for future drugs, or predict how bacteria become resistant.&#8221;  <\/p>\n\n<p>The study is a collaboration with Francisco Pulido and Dr. Frederic J Veyrier from the Institut National de la Recherche Scientifique (INRS) and Dr. Michael S. VanNieuwenhze from Indiana University.<\/p>\n\n<p>The full study is available in <strong>open<\/strong> access on the <a href=\"https:\/\/www.nature.com\/articles\/s41467-025-60005-y\">Nature Communications<\/a> website.<\/p>\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"401\" height=\"401\" src=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/03\/Yves-Brun-2.webp\" alt=\"\" class=\"wp-image-15802\" srcset=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/03\/Yves-Brun-2.webp 401w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/03\/Yves-Brun-2-300x300.webp 300w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/03\/Yves-Brun-2-150x150.webp 150w\" sizes=\"(max-width: 401px) 100vw, 401px\" \/><\/figure>\n\n<h3 class=\"wp-block-heading\" id=\"h-professeur-yves-brun-phd\">Professor <a href=\"https:\/\/brunlab.com\/\">Yves Brun<\/a>, PhD<\/h3>\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"667\" height=\"667\" src=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/MarieDelaby-1000x1000-1-edited.webp\" alt=\"\" class=\"wp-image-15895\" style=\"width:404px;height:auto\" srcset=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/MarieDelaby-1000x1000-1-edited.webp 667w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/MarieDelaby-1000x1000-1-edited-300x300.webp 300w, https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/MarieDelaby-1000x1000-1-edited-150x150.webp 150w\" sizes=\"(max-width: 667px) 100vw, 667px\" \/><\/figure>\n\n<h3 class=\"wp-block-heading\" id=\"h-marie-delaby-phd-chercheuse-postdoctorale\"><a href=\"https:\/\/brunlab.com\/about-us\/people\/marie-delaby\/\">Marie Delaby<\/a>, PhD. Postdoctoral Researcher <\/h3>\n\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new study from the Universit\u00e9 de Montr\u00e9al and collaborators has uncovered an unexpected diversity in how even closely related bacterial species elongate their cells, a fundamental process for their [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":16322,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[798],"tags":[],"class_list":["post-15906","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Bacterial Shapeshifters: Surprising Flexibility in How Closely Related Bacteria Grow - Institut Courtois d\u2019innovation biom\u00e9dicale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cibmontreal.ca\/en\/news\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bacterial Shapeshifters: Surprising Flexibility in How Closely Related Bacteria Grow\" \/>\n<meta property=\"og:description\" content=\"A new study from the Universit\u00e9 de Montr\u00e9al and collaborators has uncovered an unexpected diversity in how even closely related bacterial species elongate their cells, a fundamental process for their [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cibmontreal.ca\/en\/news\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\/\" \/>\n<meta property=\"og:site_name\" content=\"Institut Courtois d\u2019innovation biom\u00e9dicale\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-16T16:37:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-01T19:58:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cibmontreal.ca\/wp-content\/uploads\/2025\/06\/bacteries-2.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"2500\" \/>\n\t<meta property=\"og:image:height\" content=\"2500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Louis Dor\u00e9-Savard\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Louis Dor\u00e9-Savard\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/cibmontreal.ca\\\/en\\\/news\\\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/cibmontreal.ca\\\/en\\\/news\\\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\\\/\"},\"author\":{\"name\":\"Louis Dor\u00e9-Savard\",\"@id\":\"https:\\\/\\\/cibmontreal.ca\\\/#\\\/schema\\\/person\\\/e92f5f66bdd4de372aadd5dbd77c4386\"},\"headline\":\"Bacterial Shapeshifters: Surprising Flexibility in How Closely Related Bacteria Grow\",\"datePublished\":\"2025-06-16T16:37:10+00:00\",\"dateModified\":\"2025-10-01T19:58:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/cibmontreal.ca\\\/en\\\/news\\\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\\\/\"},\"wordCount\":710,\"image\":{\"@id\":\"https:\\\/\\\/cibmontreal.ca\\\/en\\\/news\\\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cibmontreal.ca\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/bacteries-2.webp\",\"articleSection\":[\"News\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/cibmontreal.ca\\\/en\\\/news\\\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\\\/\",\"url\":\"https:\\\/\\\/cibmontreal.ca\\\/en\\\/news\\\/bacterial-shapeshifters-surprising-flexibility-in-how-closely-related-bacteria-grow\\\/\",\"name\":\"Bacterial Shapeshifters: Surprising Flexibility in How Closely Related Bacteria Grow - 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