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<front>
<journal-meta>
<journal-id journal-id-type="publisher">MRD</journal-id>
<journal-title-group>
<journal-title>Magnetic Resonance Discussions</journal-title>
<abbrev-journal-title abbrev-type="publisher">MRD</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Magn. Reson. Discuss.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2699-0059</issn>
<publisher><publisher-name></publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/mr-2026-3</article-id>
<title-group>
<article-title>Accelerated &lt;sup&gt;19&lt;/sup&gt;F biomolecular magic-angle spinning NMR with paramagnetic dopants</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Becker</surname>
<given-names>Lea Marie</given-names>
<ext-link>https://orcid.org/0000-0002-6401-5151</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Toscano</surname>
<given-names>Giorgia</given-names>
<ext-link>https://orcid.org/0000-0002-9712-5031</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kapitonova</surname>
<given-names>Anna</given-names>
<ext-link>https://orcid.org/0009-0002-0204-8529</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Singh</surname>
<given-names>Rajkumar</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Guillerm</surname>
<given-names>Undina</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Lichtenecker</surname>
<given-names>Roman J.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Schanda</surname>
<given-names>Paul</given-names>
<ext-link>https://orcid.org/0000-0002-9350-7606</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Institute of Organic Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria</addr-line>
</aff>
<pub-date pub-type="epub">
<day>24</day>
<month>02</month>
<year>2026</year>
</pub-date>
<volume>2026</volume>
<fpage>1</fpage>
<lpage>14</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2026 Lea Marie Becker et al.</copyright-statement>
<copyright-year>2026</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://mr.copernicus.org/preprints/mr-2026-3/">This article is available from https://mr.copernicus.org/preprints/mr-2026-3/</self-uri>
<self-uri xlink:href="https://mr.copernicus.org/preprints/mr-2026-3/mr-2026-3.pdf">The full text article is available as a PDF file from https://mr.copernicus.org/preprints/mr-2026-3/mr-2026-3.pdf</self-uri>
<abstract>
<p>The advantageous characteristics attributed to the &lt;sup&gt;19&lt;/sup&gt;F nucleus have made it a popular target for NMR once again in recent years. Aside from solution NMR, an increasing number of studies have been conducted applying solid-state magic-angle-spinning NMR to fluorine-labeled samples. Here, the high chemical shift anisotropy and strong dipolar couplings can be utilized to get structural insights into proteins and measure long distances. Despite increasing popularity and promising benefits, the sensitivity of biomolecular &lt;sup&gt;19&lt;/sup&gt;F MAS NMR often suffers from slow longitudinal &lt;em&gt;T&lt;/em&gt;&lt;sub&gt;1&lt;/sub&gt; relaxation and therefore long recycle delays. In this work, we expand paramagnetic doping, an approach commonly used to reduce proton &lt;em&gt;T&lt;/em&gt;&lt;sub&gt;1&lt;/sub&gt; relaxation times, to &lt;sup&gt;19&lt;/sup&gt;F-labeled biological samples. We study the effect of Gd(DTPA) and Gd(DTPA-BMA) on &lt;sup&gt;19&lt;/sup&gt;F and &lt;sup&gt;13&lt;/sup&gt;C &lt;em&gt;T&lt;/em&gt;&lt;sub&gt;1&lt;/sub&gt; and &lt;em&gt;T&lt;/em&gt;&lt;sub&gt;2&lt;/sub&gt; relaxation in a [5-&lt;sup&gt;19&lt;/sup&gt;F&lt;sup&gt;13&lt;/sup&gt;C]-tryptophan-labeled protein via &lt;sup&gt;19&lt;/sup&gt;F-detected MAS NMR experiments. The observed paramagnetic relaxation enhancement substantially reduces measurement times of &lt;sup&gt;19&lt;/sup&gt;F MAS NMR experiments without compromising resolution. Additionally, we report the chemical-shift assignments of all four fluorotryptophan signals in the 12 &amp;times; 39 kDa large protein using a mutagenesis approach.</p>
</abstract>
<counts><page-count count="14"/></counts>
<funding-group>
<award-group id="gs1">
<funding-source>Österreichische Akademie der Wissenschaften</funding-source>
<award-id>PR10660EAW01</award-id>
</award-group>
</funding-group>
</article-meta>
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