This family of putative lipoproteins mainly found in Proteobacteria includes GNA1162 from Neisseria meningitidis, which shows five alpha-helices and four beta-strands, three of them forming a beta-sheet [1].

1: Structure of Neisseria meningitidis lipoprotein GNA1162. Cai X, Lu J, Wu Z, Yang C, Xu H, Lin Z, Shen Y; Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013;69:362-368. PMID:23545639