{"id":8029,"date":"2022-04-08T11:07:31","date_gmt":"2022-04-08T15:07:31","guid":{"rendered":"https:\/\/www.med.unc.edu\/pharm\/?post_type=directory&#038;p=8029"},"modified":"2025-10-29T09:03:39","modified_gmt":"2025-10-29T13:03:39","slug":"klaus-m-hahn-phd","status":"publish","type":"directory","link":"https:\/\/www.med.unc.edu\/pharm\/directory\/klaus-m-hahn-phd\/","title":{"rendered":"Klaus M. Hahn, PhD"},"content":{"rendered":"<h3><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11601 size-medium\" src=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2019\/01\/OGE-Trained-mentor-badge-webCR2-300x204.png\" alt=\"Trained Mentor Logo, Office of Graduate Education, UNC-Chapel Hill\" width=\"300\" height=\"204\" srcset=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2019\/01\/OGE-Trained-mentor-badge-webCR2-300x204.png 300w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2019\/01\/OGE-Trained-mentor-badge-webCR2-768x522.png 768w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2019\/01\/OGE-Trained-mentor-badge-webCR2-1024x696.png 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/h3>\n<h3>Research Interests<\/h3>\n<ul>\n<li>Morphodynamics, adhesion and immune signaling.<\/li>\n<li>Molecules for imaging<\/li>\n<\/ul>\n<h3>Research Synopsis<\/h3>\n<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<figure id=\"attachment_17016\" class=\"thumbnail wp-caption alignleft\" style=\"width: 320px\"><a href=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/ana-cell-frustrtated-phagocytosis-800x704-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-17016\" src=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/ana-cell-frustrtated-phagocytosis-800x704-1-300x264.jpg\" alt=\"iPalm of frustrated phagocytosis Ana Nogueira, Shiqiong Hu, Hahn lab Jesse Aaron, Leong Chew, AIC Janelia\" width=\"310\" height=\"273\" srcset=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/ana-cell-frustrtated-phagocytosis-800x704-1-300x264.jpg 300w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/ana-cell-frustrtated-phagocytosis-800x704-1-768x676.jpg 768w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/ana-cell-frustrtated-phagocytosis-800x704-1-600x528.jpg 600w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/ana-cell-frustrtated-phagocytosis-800x704-1.jpg 800w\" sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/><\/a><figcaption class=\"caption wp-caption-text\">iPalm of frustrated phagocytosis Ana Nogueira, Shiqiong Hu, Hahn lab Jesse Aaron, Leong Chew, AIC Janelia<\/figcaption><\/figure>\n<div>\n<p>Cells are not like machines with a computer chip \u201cbrain\u201d that integrates inputs and controls moving parts. They are more like transformer toys, where all parts can undergo extensive rearrangement to perform vastly different functions. The only way to understand such dynamic behavior is to study molecular actions inside living cells.<\/p>\n<\/div>\n<div>\n<p>Our lab focuses on two synergistic areas: 1) developing methods to visualize and control protein activity in live cells and animals, and 2) applying these to address basic questions re spatio-temporal control of signaling. Our biological studies center on the integration of cytoskeletal and adhesion dynamics, and phagocytosis as a model of signaling driven by mechanical force. We are extending our studies to examine the cancer microenvironment in 3D models and\u00a0<em>in vivo<\/em>.<\/p>\n<p>While addressing specific molecules for our biological studies, we produce generally applicable approaches to molecular imaging tools. These include new fluorescent biosensor designs to visualize conformational changes of endogenous proteins and to study the conformation of individual molecules in living cells. We are developing bright dyes that report protein conformational changes, and engineered domains that can be inserted into target proteins to control protein function using either light or small molecules.<\/p>\n<\/div>\n<figure id=\"attachment_17017\" class=\"thumbnail wp-caption alignright\" style=\"width: 310px\"><a href=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/transformative-publicity-figure-1000.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-17017 size-medium\" src=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/transformative-publicity-figure-1000-300x230.jpg\" alt=\"Causal analysis of circuits visualized by biosensors, courtesy Gaudenz Danuser\" width=\"300\" height=\"230\" srcset=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/transformative-publicity-figure-1000-300x230.jpg 300w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/transformative-publicity-figure-1000-768x589.jpg 768w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/transformative-publicity-figure-1000-600x460.jpg 600w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/transformative-publicity-figure-1000.jpg 1000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption class=\"caption wp-caption-text\">Causal analysis of circuits visualized by biosensors, courtesy Gaudenz Danuser<\/figcaption><\/figure>\n<p>In our biological projects, we are currently inducing macrophages to engage geometrically regular objects. Using multiplexed imaging, we simultaneously control and visualize signaling in this system. This enables us to model lines of force and molecular interactions governing target recognition and sheds light on feedback and spatio-temporal control of GTPase networks. In metastatic cells we are asking how GTPases are regulated by multiple GEFs, GDIs, and GAPs with overlapping roles, and how this is affected by the tumor microenvironment.<\/p>\n<\/div>\n<p>We are fortunate to work with collaborators whose abilities dovetail with the quantitative data on protein activation dynamics that we can provide. Working with several other investigators, including\u00a0<a href=\"https:\/\/www.utsouthwestern.edu\/labs\/danuser\/\" target=\"_blank\" rel=\"noopener\">Gaudenz Danuser<\/a>,\u00a0<a href=\"https:\/\/www.med.unc.edu\/pharm\/directory\/timothy-elston\/\" target=\"_blank\" rel=\"noopener\">Tim Elston<\/a>\u00a0 and\u00a0<a href=\"https:\/\/aps.unc.edu\/faculty-member\/superfine-richard\/\" target=\"_blank\" rel=\"noopener\">Richard Superfine<\/a>, who have been friends and collaborators for years, we can build models of signaling dynamics, apply cutting edge microscopes and use image analysis developed in part for our applications. Through synergy between the diverse expertise we all bring, we accomplish far more than the sum of the parts.<\/p>\n<p><a href=\"http:\/\/hahnlab.com\/members.html\"><strong>Check here<\/strong><\/a>\u00a0for researchers&#8217; descriptions of their ongoing projects<\/p>\n<figure id=\"attachment_17018\" class=\"thumbnail wp-caption alignnone\" style=\"width: 530px\"><a href=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-17018\" src=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3-300x112.png\" alt=\"Two biosenor cells showing Rac1 localization and activation Kraynov et al, Science 2000.\" width=\"520\" height=\"195\" srcset=\"https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3-300x112.png 300w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3-1024x384.png 1024w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3-768x288.png 768w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3-600x225.png 600w, https:\/\/www.med.unc.edu\/pharm\/wp-content\/uploads\/sites\/930\/2018\/11\/Rac1-localization-activation-labeled-1100-3.png 1100w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/a><figcaption class=\"caption wp-caption-text\">Kraynov et al, Science 2000.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<p>In case of broken links please go to\u00a0<a class=\"external-link\" href=\"http:\/\/hahnlab.com\/\"><strong>hahnlab.com<\/strong><\/a>\u00a0for Hahn lab website.<\/p>\n<h3>Recent Publications<\/h3>\n<p align=\"justify\"><strong><a class=\"external-link\" title=\"\" href=\"http:\/\/www.ncbi.nlm.nih.gov\/sites\/myncbi\/klaus.hahn.1\/bibliography\/40336082\/public\/?sort=date&amp;direction=descending\" rel=\"noopener noreferrer\">View complete list of publications in NCBI library<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Research Interests Morphodynamics, adhesion and immune signaling. Molecules for imaging Research Synopsis Cells are not like machines with a computer chip \u201cbrain\u201d that integrates inputs and controls moving parts. They are more like transformer toys, where all parts can undergo extensive rearrangement to perform vastly different functions. The only way to understand such dynamic behavior &hellip; <a href=\"https:\/\/www.med.unc.edu\/pharm\/directory\/klaus-m-hahn-phd\/\" aria-label=\"Read more about Klaus M. Hahn, PhD\">Read more<\/a><\/p>\n","protected":false},"featured_media":20146,"template":"","meta":{"_acf_changed":false,"layout":"","cellInformation":"","apiCallInformation":"","_links_to":"","_links_to_target":""},"class_list":["post-8029","directory","type-directory","status-publish","has-post-thumbnail","hentry","odd"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Klaus M. 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Thurman Distinguished Professor<\/strong>\r\n<span style=\"background-color: #007fae;color: #fff\">Accepting Rotation Students<\/span>\r\nResearch: Morphodynamics, adhesion and immune signaling. Molecules for imaging\r\nOffice: 4020 GMB\r\nPhone: <a href=\"tel:9198432775\">(919) 843-2775<\/a>\r\n<a href=\"https:\/\/hahnlab.com\/\" rel=\"noopener\">Lab Website<\/a>\r\n<a href=\"mailto:khahn@med.unc.edu\">Email<\/a>"],"_upd_no_link":[],"_upd_degree1":[],"_upd_degree2":[],"_upd_email":[[{"email_text":"khahn@med.unc.edu"}]],"_upd_phone":[[{"phone_text":"919-843-2775","phone_type":"Office Phone"}]],"_upd_address":[[{"address":{"address-1":"120 Mason Farm Rd.","address-2":"4020 Genetic Medicine","campus-box":"CB # 7365","city":"Chapel Hill","state":"NC","zip":"27599-7365"}}]],"_links":{"self":[{"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/directory\/8029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/directory"}],"about":[{"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/types\/directory"}],"version-history":[{"count":1,"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/directory\/8029\/revisions"}],"predecessor-version":[{"id":25304,"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/directory\/8029\/revisions\/25304"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/media\/20146"}],"wp:attachment":[{"href":"https:\/\/www.med.unc.edu\/pharm\/wp-json\/wp\/v2\/media?parent=8029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}