Charged multivesicular body protein 2b is a protein that in humans is encoded by the CHMP2Bgene.[1][2] It forms part of one of the endosomal sorting complexes required for transport (ESCRT) - specifically ESCRT-III - which are a series of complexes involved in cell membrane remodelling. CHMP2B forms long chains that spiral around the neck of a budding vesicle. Along with the other components of ESCRT-III, CHMP2B constricts the neck of the vesicle just before it is cleaved away from the membrane.
Mutations of this gene cause chromosome 3-linked frontotemporal dementia (FTD3), which has been described in several members of one Danish family [2]. In a study of French families with several forms of frontotemporal dementia, it was found to be a relatively rare cause.[3]
References
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↑Ghanim M, Guillot-Noel L, Pasquier F, Jornea L, Deramecourt V, Dubois B, Le Ber I, Brice A (July 2010). "CHMP2B mutations are rare in French families with frontotemporal lobar degeneration". J Neurol. 257 (12): 2032–6. doi:10.1007/s00415-010-5655-8. PMID20625756.
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Cannon A, Baker M, Boeve B, et al. (2006). "CHMP2B mutations are not a common cause of frontotemporal lobar degeneration". Neurosci. Lett. 398 (1–2): 83–4. doi:10.1016/j.neulet.2005.12.056. PMID16431024.