<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div>Hi Justin,<div><br></div><div>Thank you for this announcement and for your efforts to make this happen. It has been great to collaborate will all at EMDB/EBI and wwPDB on this. It certainly came about thanks to the efforts of many, inspired by the various challenges and workshops that brought many together to discuss these topics.</div><div><a href="https://urldefense.com/v3/__https://www.emdataresource.org/challenges__;!!Mih3wA!Cpk6rXHVuu0gDlxssQu-SPFcCy-wHc9ssu3Rz9WSq608xsW3oh0gZZfhU8RM4n2DbWeg6EGVp76lIz2U$">https://www.emdataresource.org/challenges</a></div><div><br></div><div>As a small anecdote, the name Q-score was coined by Wah Chiu, circa 2020, at a validation workshop in Hinxton, UK, while brainstorming how to test if atoms are really resolved in the then-new atomic resolution maps that just came out from various groups.</div><div><a href="https://urldefense.com/v3/__https://www.ebi.ac.uk/pdbe/news/cryoem-archiving-and-validation-recommendations__;!!Mih3wA!Cpk6rXHVuu0gDlxssQu-SPFcCy-wHc9ssu3Rz9WSq608xsW3oh0gZZfhU8RM4n2DbWeg6EGVp2TIVGLW$">https://www.ebi.ac.uk/pdbe/news/cryoem-archiving-and-validation-recommendations</a></div><div><br></div><div>We then realized it works ok for lower resolutions too. The correlation to resolution was maybe initially surprising, then we realized it can be rather useful. Hoping this will continue to be useful as a guide for map-model fit and resolvability.</div><div><br></div><div>With kind regards,</div><div><br></div><div>Greg P.</div><div><br></div><div><br><blockquote type="cite"><div>On Sep 25, 2025, at 8:55 AM, Justin Flatt via 3dem <3dem@ncmir.ucsd.edu> wrote:</div><br class="Apple-interchange-newline"><div><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><div style="font-size: 10pt; font-family: Verdana,Geneva,sans-serif"><p><span style="white-space: nowrap;">Dear all,</span><br><br>The wwPDB is continuing to improve and expand our validation offerings with a new addition to the wwPDB PDF validation reports. Building on the success of the coordinate‑model percentile sliders, which help depositors, reviewers, and archive users assess PDB model quality in the context of the PDB archive, we are now extending this section to include a Q-score percentile slider. The new slider is the first to empower users of this report to assess model-map quality at a glance relative to the EMDB/PDB archives.<br><br>Starting October 01, newly released 3DEM entries will include the Q‑score percentile slider in its own section below the current sliders under “Overall quality at a glance.” The slider compares an entry’s average Q‑score against both the entire EMDB/PDB archive and a resolution‑similar subset. Because Q‑score correlates strongly with resolution between 1–10 Å, the percentile helps check whether a reported global resolution is reasonable; unusually low values can flag model–map fit or map quality issues. A dedicated Q‑score section supports deeper review with residue‑level mapping to the coordinate model and per‑chain tables.<br><br>In the near future, wwPDB will re-generate validation reports with Q-score slider for all existing entries in the PDB archive.<br><br>We are excited for our users to get their hands on this new validation metric. If you have any queries or feedback please let us know at <a href="mailto:info@wwpdb.org">info@wwpdb.org</a>.<br><br>Please find the full news here: <a href="https://urldefense.com/v3/__https://www.wwpdb.org/news/news?year=2025*68c9b3a1829c3fea8eaf394d__;Iw!!Mih3wA!DmzD26nwdND2Y8FsQX1esfuCAcC4AppFx54gWMKTbAUk9j8bH2QUAqBEXm37AU5qgbetrnlYqLM9wRws1ZTiAjLF$" target="_blank" rel="noopener noreferrer">https://www.wwpdb.org/news/news?year=2025#68c9b3a1829c3fea8eaf394d</a><br><br><span style="white-space: nowrap;">Best wishes,</span><br>Justin Flatt<span style="white-space: nowrap;"> on behalf of the wwPDB</span></p>
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