Major vault protein explained

Major vault protein, also known as lung resistance-related protein is a protein that in humans is encoded by the MVP gene.[1] 78 copies of the protein assemble into the large compartments called vaults.

Function

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.[2] 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.[3]

Interactions

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.[4]

Major vault protein has been shown to interact with estrogen receptor alpha,[5] PTEN[6] and PARP4.[7] [8]

Further reading

Notes and References

  1. Scheffer GL, Wijngaard PL, Flens MJ, Izquierdo MA, Slovak ML, Pinedo HM, Meijer CJ, Clevers HC, Scheper RJ . The drug resistance-related protein LRP is the human major vault protein . Nature Medicine . 1 . 6 . 578–582 . June 1995 . 7585126 . 10.1038/nm0695-578 . free . 29771830 . 20.500.11755/c49e6086-ede3-4b91-ac6e-4ab9158c6cac .
  2. Berger W, Steiner E, Grusch M, Elbling L, Micksche M . Vaults and the major vault protein: novel roles in signal pathway regulation and immunity . Cellular and Molecular Life Sciences . 66 . 1 . 43–61 . January 2009 . 18759128 . 11131553 . 10.1007/s00018-008-8364-z .
  3. Web site: Entrez Gene: MVP major vault protein.
  4. Kong LB, Siva AC, Rome LH, Stewart PL . Structure of the vault, a ubiquitous celular component . Structure . 7 . 4 . 371–379 . April 1999 . 10196123 . 10.1016/s0969-2126(99)80050-1 . free .
  5. Abbondanza C, Rossi V, Roscigno A, Gallo L, Belsito A, Piluso G, Medici N, Nigro V, Molinari AM, Moncharmont B, Puca GA . Interaction of vault particles with estrogen receptor in the MCF-7 breast cancer cell . The Journal of Cell Biology . 141 . 6 . 1301–1310 . June 1998 . 9628887 . 2132791 . 10.1083/jcb.141.6.1301 .
  6. Yu Z, Fotouhi-Ardakani N, Wu L, Maoui M, Wang S, Banville D, Shen SH . PTEN associates with the vault particles in HeLa cells . The Journal of Biological Chemistry . 277 . 43 . 40247–40252 . October 2002 . 12177006 . 10.1074/jbc.M207608200 . free .
  7. van Zon A, Mossink MH, Schoester M, Scheffer GL, Scheper RJ, Sonneveld P, Wiemer EA . Structural domains of vault proteins: a role for the coiled coil domain in vault assembly . Biochemical and Biophysical Research Communications . 291 . 3 . 535–541 . March 2002 . 11855821 . 10.1006/bbrc.2002.6472 .
  8. Kickhoefer VA, Siva AC, Kedersha NL, Inman EM, Ruland C, Streuli M, Rome LH . The 193-kD vault protein, VPARP, is a novel poly(ADP-ribose) polymerase . The Journal of Cell Biology . 146 . 5 . 917–928 . September 1999 . 10477748 . 2169495 . 10.1083/jcb.146.5.917 .