This is a family of proteins of unknown function expressed by various bacterial species. Some members of this family (e.g. Swiss:Q8Z8Z7, Swiss:Q8ZRF4) are thought to be lipoproteins. Another member of this family (Swiss:Q93SV8) is thought to be involved in photosynthesis [1]. Based on structure predictions (from AlphaFold and structural comparisons using DALI server), this family may have a lysozyme-like fold.

1: Molecular evidence for the early evolution of photosynthesis. Xiong J, Fischer WM, Inoue K, Nakahara M, Bauer CE; Science 2000;289:1724-1730. PMID:10976061