Major vault protein, also known as lung resistance-related protein is a protein that in humans is encoded by the MVPgene.[5][6] 78 copies of the protein assemble into the large compartments called vaults.
This gene encodes the major vault protein which is a lung infection resistance-related protein. Vaults are multi-subunit structures that may be involved in nucleo-cytoplasmic transport. Major vault protein comprises 70% of vaults which also contain vPARP and TEP1.[7] This protein mediates drug resistance, perhaps via a transport process. It is widely distributed in normal tissues and overexpressed in multidrug-resistant cancer cells. The protein overexpression is a potentially useful marker of clinical drug resistance. This gene produces two transcripts by using two alternative exon 2 sequences; however, the open reading frames are the same in both transcripts.[6]
Major vault protein coimmunoprecipitates with the human estrogen receptor and treatment with estradiol increases major vault protein associated with the estrogen receptor in nuclear extracts.[8]
^van Zon A, Mossink MH, Schoester M, Scheffer GL, Scheper RJ, Sonneveld P, et al. (March 2002). "Structural domains of vault proteins: a role for the coiled coil domain in vault assembly". Biochemical and Biophysical Research Communications. 291 (3): 535–541. doi:10.1006/bbrc.2002.6472. PMID11855821.
Izquierdo MA, Scheffer GL, Flens MJ, Schroeijers AB, van der Valk P, Scheper RJ (June 1996). "Major vault protein LRP-related multidrug resistance". European Journal of Cancer. 32A (6): 979–984. doi:10.1016/0959-8049(96)00053-6. PMID8763338.
Slovak ML, Ho JP, Cole SP, Deeley RG, Greenberger L, de Vries EG, et al. (October 1995). "The LRP gene encoding a major vault protein associated with drug resistance maps proximal to MRP on chromosome 16: evidence that chromosome breakage plays a key role in MRP or LRP gene amplification". Cancer Research. 55 (19): 4214–4219. PMID7671223.
Sugawara I, Akiyama S, Scheper RJ, Itoyama S (January 1997). "Lung resistance protein (LRP) expression in human normal tissues in comparison with that of MDR1 and MRP". Cancer Letters. 112 (1): 23–31. doi:10.1016/S0304-3835(96)04542-9. PMID9029166.
Lange C, Walther W, Schwabe H, Stein U (November 2000). "Cloning and initial analysis of the human multidrug resistance-related MVP/LRP gene promoter". Biochemical and Biophysical Research Communications. 278 (1): 125–133. doi:10.1006/bbrc.2000.3782. PMID11071864.
van Zon A, Mossink MH, Schoester M, Scheffer GL, Scheper RJ, Sonneveld P, et al. (March 2002). "Structural domains of vault proteins: a role for the coiled coil domain in vault assembly". Biochemical and Biophysical Research Communications. 291 (3): 535–541. doi:10.1006/bbrc.2002.6472. PMID11855821.
Zhao Y, Yu L, Wang Q, Lou F, Pu J (March 2002). "[The relationship between expression of lung resistance-related protein gene or multidrug resistance-associated protein gene and prognosis in newly diagnosed acute leukemia]". Zhonghua Nei Ke Za Zhi. 41 (3): 183–185. PMID11940320.
van den Heuvel-Eibrink MM, Wiemer EA, Prins A, Meijerink JP, Vossebeld PJ, van der Holt B, et al. (May 2002). "Increased expression of the breast cancer resistance protein (BCRP) in relapsed or refractory acute myeloid leukemia (AML)". Leukemia. 16 (5): 833–839. doi:10.1038/sj.leu.2402496. PMID11986944. S2CID24297761.