A component of the bacterial microcompartment (BMC) shell dedicated to ethanolamine degradation. Each homohexamer has a central pore with an opening of up to 9.0 Angstroms. Expression of the eut operon may allow this bacteria to use ethanolamine as a carbon, nitrogen and energy source. The pore probably allows metabolite passage into and out of the BMC. Amine and polyamine degradation; ethanolamine degradation. Homohexamer; has a positively charged pore 9 Angstroms in diameter. The hexamers pack into a two-dimensional array (PubMed:23144756). May interact with EutQ (By similarity). Belongs to the bacterial microcompartments protein family.