This domain is found in TTHB210 protein present in Thermus thermophilus. TTHB210 is a Sigma-E factor regulated gene product that forms a homodecamer. This domain is chain G and can be classified with chains A, C, E and I based on its folds [1].

1: Crystal structure of hypothetical protein TTHB210, controlled by the sigma(E) /anti-sigma(E) regulatory system in Thermus thermophilus HB8, reveals a novel homodecamer. Agari Y, Kuramitsu S, Shinkai A; Proteins. 2012;80:958-962. PMID:22231934