<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><h2 class=""><span style="font-style: normal; font-weight: normal;" class="">wwPDB News 4/20/2021</span></h2><h2 class="">Future Planning: Entries with extended PDB and CCD ID codes will be distributed in PDBx/mmCIF format only</h2><p class="">wwPDB, in collaboration with the <a href="https://www.wwpdb.org/task/mmcif" class="">PDBx/mmCIF Working Group</a>,
has set plans to extend the length of ID codes for PDB and Chemical
Component Dictionary (CCD) ID entries in the future. Entries containing
these extended IDs will not be supported by the legacy PDB file format.</p><p class="">CCD
entries are currently identified by unique three-character alphanumeric
codes. At current growth rates, we anticipate running out of available
new codes in the next three to four years. At this point, the wwPDB will
issue four-character alphanumeric codes for CCD IDs in the OneDep
system. Due to constraints of the legacy PDB file format, entries
containing these new, four character ID codes will only be distributed
in PDBx/mmCIF format. The wwPDB will begin implementation of extended
CCD ID codes in 2022.</p><div class="">In addition, wwPDB also plans extended PDB ID length to eight
characters prefixed by ‘PDB’, e.g., pdb_00001abc. Each PDB ID has a
corresponding Digital Object Identifier (DOI), often required for
manuscript submission to journals and described in publications by the
structure authors. Both extended PDB IDs and corresponding PDB DOIs,
along with existing four character PDB IDs, will be included in the
PDBx/mmCIF formatted files for all new entries by Fall 2021.</div></div><div class=""><p class="">For
example, PDB entry 1ABC will also have the extended PDB ID
(pdb_00001abc) and the corresponding PDB DOI (10.2210/pdb1abc/pdb)
listed in the _database_2 PDBx/mmCIF category.</p><p class=""><tt class=""> loop_<br class=""> _database_2.database_id <br class="">_database_2.database_code<br class=""> _database_2.pdbx_database_accession<br class=""> _database_2.pdbx_DOI<br class=""> PDB 1abc pdb_00001abc 10.2210/pdb1abc/pdb <br class="">WWPDB D_1xxxxxxxxx ? ? </tt></p><p class="">Once
four-character PDB IDs are all consumed, newly-deposited PDB entries
will only be issued extended PDB ID codes, and entries will only be
distributed in PDBx/mmCIF format.</p><p class="">wwPDB is asking PDB users and related software developers to review code and begin to remove such limitations for the future.</p></div><div class=""><br class=""></div><div class="">Source:</div><div class=""><a href="https://www.wwpdb.org/news/news?year=2021#607760112786e73a79c76f9d" class="">https://www.wwpdb.org/news/news?year=2021#607760112786e73a79c76f9d</a></div><div class=""><br class=""></div><div class=""><br class=""></div><br class=""><div class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Cathy Lawson</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Institute for Quantitative Biomedicine</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Rutgers University</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><a href="mailto:cathy.lawson@rcsb.org" class="">cathy.lawson@rcsb.org</a></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">848 445 5494</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class=""></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline">
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