[3dem] Deposition of Half-maps for Certain EM Entries to Become Mandatory
Justin Flatt
justin at rcsb.rutgers.edu
Wed Dec 15 08:37:57 PST 2021
From February 25, 2022, deposition of half-maps for single-particle,
single-particle-based helical, and sub-tomogram averaging
reconstructions to the EM Data Bank (EMDB) will become mandatory. This
change is in response to a long-standing community request to the wwPDB
EMDB Core Archive and was also a recommendation from the 2020 wwPDB
single-particle cryo-EM data-management workshop (white paper in
preparation). Several recommendations from this workshop have already
been implemented in the wwPDB OneDep system. These include improvements
to wwPDB validation reports
<http://www.wwpdb.org/news/news?year=2021#5ffc647df32c497fd6f7bf65> and
enhancements for capturing metadata via the deposition interface.
Mandatory half-maps must be unfiltered, unmasked, unsharpened, and
positioned in the same coordinate-space and orientation as the primary
map such that they superimpose. The availability of half-maps will
contribute to improved validation of EM structures as reflected in the
wwPDB validation reports.
wwPDB strongly urges developers of cryo-EM processing software for the
affected modalities to implement support for output of such half-maps
(if this is not already available).
Any queries about this policy change can be directed to info at wwpdb.org.
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