/usr/include/libpwiz/pwiz/data/proteome/ is in libpwiz-dev 3.0.4624-6ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libpwiz/pwiz/data/proteome/AminoAcid.hpp
/usr/include/libpwiz/pwiz/data/proteome/DefaultReaderList.hpp
/usr/include/libpwiz/pwiz/data/proteome/Diff.hpp
/usr/include/libpwiz/pwiz/data/proteome/Digestion.hpp
/usr/include/libpwiz/pwiz/data/proteome/Modification.hpp
/usr/include/libpwiz/pwiz/data/proteome/Peptide.hpp
/usr/include/libpwiz/pwiz/data/proteome/ProteinListCache.hpp
/usr/include/libpwiz/pwiz/data/proteome/ProteinListWrapper.hpp
/usr/include/libpwiz/pwiz/data/proteome/ProteomeData.hpp
/usr/include/libpwiz/pwiz/data/proteome/ProteomeDataFile.hpp
/usr/include/libpwiz/pwiz/data/proteome/Reader.hpp
/usr/include/libpwiz/pwiz/data/proteome/Reader_FASTA.hpp
/usr/include/libpwiz/pwiz/data/proteome/Serializer_FASTA.hpp
/usr/include/libpwiz/pwiz/data/proteome/TextWriter.hpp
/usr/include/libpwiz/pwiz/data/proteome/Version.hpp
/usr/include/libpwiz/pwiz/data/proteome/examples.hpp