Candidatus Nanoclepta

St. John, Reysenbach (2023). Bergey's Manual of Systematics of Archaea and Bacteria
Names (1)
Abstract'ta. Gr. masc. n. nânos, a dwarf; Gr. masc. n. kleptês, a thief; N.L. masc. n. Nanoclepta, a small thief, a small organism that steals from its host. Nanoarchaeota / Nanobdellia / Nanobdellales / Nanobdellaceae / Candidatus Nanoclepta The genus Candidatus Nanoclepta currently comprises a single species, Candidatus Nanoclepta minutus Ncl‐1, an anaerobic hyperthermophile (optimal growth observed from 80 to 85°C) cultivated from a New Zealand hot spring. Cells are ultra‐small cocci (∼200 nm) with archaeal flagella and are cultivated in near‐neutral pH conditions (pH ∼6.0). Like several other Nanoarchaeota , Ca . N. minutus cells are epibionts on the surface of a host from the Crenarchaeota . Although this symbiosis is obligate for Ca . N. minutus, the relationship is not required for the host, Zestosphaera tikiterensis NZ3 T , which can survive as a free‐living organism. Ca . N. minutus has a highly reduced genome (∼0.58 Mb) with minimal biosynthetic potential and no detected ATP synthase genes, and Ca . Nanoclepta cells likely rely on their host for many metabolic precursors. DNA G + C content (mol%) : 32.2 (genome analysis). Type species : Candidatus Nanoclepta minutus St. John et al. 2019a.
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