5to5

From Proteopedia

Jump to: navigation, search

Structure of the TPR oligomerization domain

Structural highlights

5to5 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.5Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

TPR_HUMAN Papillary or follicular thyroid carcinoma. A chromosomal aberration involving TPR has been found in papillary thyroid carcinomas (PTCs). Intrachromosomal rearrangement that links the 5'-end of the TPR gene to the protein kinase domain of NTRK1 forms the fusion protein TRK-T1. TRK-T1 is a 55 kDa protein reacting with antibodies against the carboxy terminus of the NTRK1 protein.[1] Involved in tumorigenic rearrangements with the MET.[2]

Function

TPR_HUMAN Component of the nuclear pore complex (NPC), a complex required for the trafficking across the nuclear envelope. Functions as a scaffolding element in the nuclear phase of the NPC essential for normal nucleocytoplasmic transport of proteins and mRNAs, plays a role in the establishment of nuclear-peripheral chromatin compartmentalization in interphase, and in the mitotic spindle checkpoint signaling during mitosis. Involved in the quality control and retention of unspliced mRNAs in the nucleus; in association with NUP153, regulates the nuclear export of unspliced mRNA species bearing constitutive transport element (CTE) in a NXF1- and KHDRBS1-independent manner. Negatively regulates both the association of CTE-containing mRNA with large polyribosomes and translation initiation. Does not play any role in Rev response element (RRE)-mediated export of unspliced mRNAs. Implicated in nuclear export of mRNAs transcribed from heat shock gene promoters; associates both with chromatin in the HSP70 promoter and with mRNAs transcribed from this promoter under stress-induced conditions. Modulates the nucleocytoplasmic transport of activated MAPK1/ERK2 and huntingtin/HTT and may serve as a docking site for the XPO1/CRM1-mediated nuclear export complex. According to some authors, plays a limited role in the regulation of nuclear protein export (PubMed:22253824 and PubMed:11952838). Plays also a role as a structural and functional element of the perinuclear chromatin distribution; involved in the formation and/or maintenance of NPC-associated perinuclear heterochromatin exclusion zones (HEZs). Finally, acts as a spatial regulator of the spindle-assembly checkpoint (SAC) response ensuring a timely and effective recruitment of spindle checkpoint proteins like MAD1L1 and MAD2L1 to unattached kinetochore during the metaphase-anaphase transition before chromosome congression. Its N-terminus is involved in activation of oncogenic kinases.[3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]

See Also

References

  1. ↑ Greco A, Pierotti MA, Bongarzone I, Pagliardini S, Lanzi C, Della Porta G. TRK-T1 is a novel oncogene formed by the fusion of TPR and TRK genes in human papillary thyroid carcinomas. Oncogene. 1992 Feb;7(2):237-42. PMID:1532241
  2. ↑ Soman NR, Wogan GN, Rhim JS. TPR-MET oncogenic rearrangement: detection by polymerase chain reaction amplification of the transcript and expression in human tumor cell lines. Proc Natl Acad Sci U S A. 1990 Jan;87(2):738-42. PMID:2300559
  3. ↑ Shibata S, Matsuoka Y, Yoneda Y. Nucleocytoplasmic transport of proteins and poly(A)+ RNA in reconstituted Tpr-less nuclei in living mammalian cells. Genes Cells. 2002 Apr;7(4):421-34. PMID:11952838
  4. ↑ Cornett J, Cao F, Wang CE, Ross CA, Bates GP, Li SH, Li XJ. Polyglutamine expansion of huntingtin impairs its nuclear export. Nat Genet. 2005 Feb;37(2):198-204. Epub 2005 Jan 16. PMID:15654337 doi:http://dx.doi.org/10.1038/ng1503
  5. ↑ Skaggs HS, Xing H, Wilkerson DC, Murphy LA, Hong Y, Mayhew CN, Sarge KD. HSF1-TPR interaction facilitates export of stress-induced HSP70 mRNA. J Biol Chem. 2007 Nov 23;282(47):33902-7. Epub 2007 Sep 25. PMID:17897941 doi:http://dx.doi.org/10.1074/jbc.M704054200
  6. ↑ Vomastek T, Iwanicki MP, Burack WR, Tiwari D, Kumar D, Parsons JT, Weber MJ, Nandicoori VK. Extracellular signal-regulated kinase 2 (ERK2) phosphorylation sites and docking domain on the nuclear pore complex protein Tpr cooperatively regulate ERK2-Tpr interaction. Mol Cell Biol. 2008 Nov;28(22):6954-66. doi: 10.1128/MCB.00925-08. Epub 2008 Sep , 15. PMID:18794356 doi:http://dx.doi.org/10.1128/MCB.00925-08
  7. ↑ Lee SH, Sterling H, Burlingame A, McCormick F. Tpr directly binds to Mad1 and Mad2 and is important for the Mad1-Mad2-mediated mitotic spindle checkpoint. Genes Dev. 2008 Nov 1;22(21):2926-31. doi: 10.1101/gad.1677208. PMID:18981471 doi:http://dx.doi.org/10.1101/gad.1677208
  8. ↑ Lince-Faria M, Maffini S, Orr B, Ding Y, Claudia Florindo, Sunkel CE, Tavares A, Johansen J, Johansen KM, Maiato H. Spatiotemporal control of mitosis by the conserved spindle matrix protein Megator. J Cell Biol. 2009 Mar 9;184(5):647-57. doi: 10.1083/jcb.200811012. PMID:19273613 doi:http://dx.doi.org/10.1083/jcb.200811012
  9. ↑ Nakano H, Funasaka T, Hashizume C, Wong RW. Nucleoporin translocated promoter region (Tpr) associates with dynein complex, preventing chromosome lagging formation during mitosis. J Biol Chem. 2010 Apr 2;285(14):10841-9. doi: 10.1074/jbc.M110.105890. Epub 2010 , Feb 4. PMID:20133940 doi:http://dx.doi.org/10.1074/jbc.M110.105890
  10. ↑ Krull S, Dorries J, Boysen B, Reidenbach S, Magnius L, Norder H, Thyberg J, Cordes VC. Protein Tpr is required for establishing nuclear pore-associated zones of heterochromatin exclusion. EMBO J. 2010 May 19;29(10):1659-73. doi: 10.1038/emboj.2010.54. Epub 2010 Apr 20. PMID:20407419 doi:http://dx.doi.org/10.1038/emboj.2010.54
  11. ↑ Coyle JH, Bor YC, Rekosh D, Hammarskjold ML. The Tpr protein regulates export of mRNAs with retained introns that traffic through the Nxf1 pathway. RNA. 2011 Jul;17(7):1344-56. doi: 10.1261/rna.2616111. Epub 2011 May 25. PMID:21613532 doi:http://dx.doi.org/10.1261/rna.2616111
  12. ↑ Rajanala K, Nandicoori VK. Localization of nucleoporin Tpr to the nuclear pore complex is essential for Tpr mediated regulation of the export of unspliced RNA. PLoS One. 2012;7(1):e29921. doi: 10.1371/journal.pone.0029921. Epub 2012 Jan 13. PMID:22253824 doi:http://dx.doi.org/10.1371/journal.pone.0029921
  13. ↑ Bangs P, Burke B, Powers C, Craig R, Purohit A, Doxsey S. Functional analysis of Tpr: identification of nuclear pore complex association and nuclear localization domains and a role in mRNA export. J Cell Biol. 1998 Dec 28;143(7):1801-12. PMID:9864356

Contents


PDB ID 5to5

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://proteopedia.org/wiki/index.php/5to5"
Personal tools