Torsin-1A-interacting protein 1 is a protein that in humans is encoded by the TOR1AIP1gene.[5][6][7] More commonly known as lamina associated polypeptide 1 (LAP1), it is a type II integral membrane protein that resides in the inner nuclear membrane. The luminal domain of LAP1 interacts with Torsin A and is necessary for the ATPase activity of Torsin A. LAP1 plays a critical role in skeletal and heart muscle.[8][9] Mutations in TOR1AIP1 have been linked to muscular dystrophy and cardiomyopathy.[10][11] It's deletion from mouse hepatocytes leads to defected very-low density lipoprotein secretion and causes non-alcoholic fatty liver disease and non-alcoholic steatohepatitis[12]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Kondo Y, Kondoh J, Hayashi D, Ban T, Takagi M, Kamei Y, Tsuji L, Kim J, Yoneda Y (Jun 2002). "Molecular cloning of one isotype of human lamina-associated polypeptide 1s and a topological analysis using its deletion mutants". Biochem Biophys Res Commun. 294 (4): 770–8. doi:10.1016/S0006-291X(02)00563-6. PMID12061773.
^Shin JY, Méndez-López I, Wang Y, Hays AP, Tanji K, Lefkowitch JH, Schulze PC, Worman HJ, Dauer WT. (2013) Lamina-associated polypeptide-1 interacts with the muscular dystrophy protein emerin and is essential for skeletal muscle maintenance. Dev Cell.26:591-603. doi: 10.1016/j.devcel.2013.08.012.
^Shin JY, Le Dour C, Sera F, Iwata S, Homma S, Joseph LC, Morrow JP, Dauer WT, Worman HJ. (2014) Depletion of lamina-associated polypeptide 1 from cardiomyocytes causes cardiac dysfunction in mice. Nucleus. 5:260-459. doi: 10.4161/nucl.29227.
^Kayman-Kurekci G, Talim B, Korkusuz P, Sayar N, Sarioglu T, Oncel I, Sharafi P, Gundesli H, Balci-Hayta B, Purali N, Serdaroglu-Oflazer P, Topaloglu H, Dincer P. (2014) Mutation in TOR1AIP1 encoding LAP1B in a form of muscular dystrophy: a novel gene related to nuclear envelopathies. Neuromuscul Disord. 24:624-33. doi: 10.1016/j.nmd.2014.04.007
^Ghaoui R, Benavides T, Lek M, Waddell LB, Kaur S, North KN, MacArthur DG, Clarke NF, Cooper ST. (2016) TOR1AIP1 as a cause of cardiac failure and recessive limb-girdle muscular dystrophy. Neuromuscul Disord. 26:500-503. doi: 10.1016/j.nmd.2016.05.013.