词条 | Translationally-controlled tumor protein |
释义 |
TCTP protein Is also referred to as Q23,[5] P21,[6] P23,[7] Histamine releasing factor(HRF),[8] and fortilin.[9] TCTP is a multifunctional and highly conserved protein that existed ubiquitously in different eukaryote species and distributed widely in various tissues and cell types.[10] Human translationally controlled tumor protein (hTCTP) is a growth-related, calcium-binding protein.[11] HistoryTranslationally controlled tumor protein was first discovered in 1989 as a cDNA sequence obtained from a human mammary carcinoma cDNA library with proves derived from the translationally controlled, growth-related mouse tumor protein TCTP.[12] TCTP was originally described as a growth related protein of tumor cells. Its mRNA accumulates in translationally repressed postpolysomal mRNP-complexes.[13] Research in 1997 shown that TCTP is not a tumor- or tissue-specific protein, but is expressed ubiquitously from plants to mammals[14][15][16][17] CharacteristicsTCTP is a 20–25 kDa protein abundantly and ubiquitously expressed in the cell.[11] The protein is transcribed in more that 500 different tissues and cell types, hTCTP gene is one of the top 10 most ubiquitously expressed genes in humans by examining 1753 libraries from kinds of tissues,[18] but differed considerably in their quantity and ratio of expression, the expression is lower in kidney and renal cells.[14] This indicates an extensive transcriptional control and involvement of tissue-specific factors.[19] The majority of publications established TCTP to be a cytoplasmic protein but nuclear localisation has also been reported, as well as extracellular activity, however the process of secretion has not been found.[19] FunctionThe abundance and ubiquity indicate that TCTP may have important primary functions. However, a large number of cellular and biochemical functions have been found since 1980s. Most of these functions can be classified into three groups.[11] Growth-relatedTCTP has properties of a tubulin binding protein that associates with microtubules in a cell cycle-dependent manner.[20][21] The transient overexpression of TCTP in HeLa cells prevented them from undergoing etoposide-induced apoptosis.[9] Expressing TCTP in U2OS (Human Bone Osteosarcoma Epithelial Cells) protected them from cell death induced by etoposide over various concentrations and durations of exposure.[9] TCTP overexpression inhibited caspase-3-like activity as assessed by the cleavage of fluorogenic substrate.[9] Expression levels of TCTP were down-regulated at the mRNA and protein levels during tumor suppression and by the activation of p53 and Siah-1 very well known anti-tumor genes.[22][23] Down-regulation of TCTP can induce tumor reversion, and in combination with some drugs that decrease the level of TCTP and will lead to kill tumor cells.[24] TCTP knockdown in primary mammary tumor cells, results in increased p53 expression and a decreased number of stem-like cancer cells.[25] Reducing TCTP (dTCTP) levels in Drosophila reduces cell size, cell number and organ size, which mimicsDrosophila Rheb (dRheb) mutant phenotypes; Human TCTP (hTCTP) shows similar biochemical properties compared to dTCTP Immunity-relatedTCTP caused histamine release from the human basophils of a subpopulation of donors, and this release was dependent on IgE.[8][26] The expression of TCTP is regulated at two distinct levels, depletion of the ER calcium causes an increase in TCTP mRNA abundance, increased cytosolic calcium concentrations regulate gene expression at the post-transcriptional level.[14][27][28] Downregulation of the protein levels by siRNA in HTR-8/SVneo (Homo sapiens placenta cells) was associated with a reduced cellular calcium-uptake activity and buffering capacity.[19] Cancer-relatedTranslationally-controlled tumor protein has a role in tumor reversion and development.[29][30] Translationally Controlled Tumor Protein (TCTP/tpt1) is a regulator of the cancer stem cell compartment,[31] the tumor reversion,[32][33] tumor progression and certain forms of inflammatory diseases.[8] Moreover, TCTP was described as a pro-survival protein antagonizing BAX function [34] StructureSequence alignment of TCTP sequences from more than 30 different species reveals a high degree of conservation over a long period of evolution.[19] The solution structure of TCTP from yeast, Schizosaccharomyces pombe has been determined by NMR spectroscopy which indicated that this protein is structurally similar to two small guanine nucleotide-free chaperones, namely Mss4 and Dss4.[35] TCTP and Mss4/Dss4 are now therefore structurally grouped into one protein superfamily.[19] Translationally Controlled Tumor Protein (TCTP) is involved in a wide range of molecular interactions with biological and nonbiological partners of various chemical compositions such as proteins, peptides, nucleic acids, carbohydrates, or small molecules. TCTP is therefore an important and versatile binding platform. Many of these protein–protein interactions have been validated, albeit only few received an in-depth structural characterization. In TCTP/tpt1 - Remodeling Signaling from Stem Cell to Disease, focus is on the structural analysis of TCTP and the review of the available literature regarding its interaction network from a structural perspective. [36] InteractionsTCTP has been shown to interact with:
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^{{cite journal | vauthors = Amson R, Pece S, Lespagnol A, Vyas R, Mazzarol G, Tosoni D, Colaluca I, Viale G, Rodrigues-Ferreira S, Wynendaele J, Chaloin O, Hoebeke J, Marine JC, Di Fiore PP, Telerman A | title = Reciprocal repression between P53 and TCTP | language = en | journal = Nature Medicine | volume = 18 | issue = 1 | pages = 91–9 | date = January 2012 | pmid = 22157679 | doi = 10.1038/nm.2546 }} 26. ^{{cite journal | vauthors = Bheekha-Escura R, MacGlashan DW, Langdon JM, MacDonald SM | title = Human recombinant histamine-releasing factor activates human eosinophils and the eosinophilic cell line, AML14-3D10 | journal = Blood | volume = 96 | issue = 6 | pages = 2191–8 | date = September 2000 | pmid = 10979965 }} 27. ^{{cite journal | vauthors = Xu A, Bellamy AR, Taylor JA | title = Expression of translationally controlled tumour protein is regulated by calcium at both the transcriptional and post-transcriptional level | journal = The Biochemical Journal | volume = 342 | issue = 3 | pages = 683–9 | date = September 1999 | pmid = 10477280 | pmc = 1220510 | doi=10.1042/0264-6021:3420683}} 28. ^{{cite journal | vauthors = Haghighat NG, Ruben L | title = Purification of novel calcium binding proteins from Trypanosoma brucei: properties of 22-, 24- and 38-kilodalton proteins | journal = Molecular and Biochemical Parasitology | volume = 51 | issue = 1 | pages = 99–110 | date = March 1992 | pmid = 1565142 | doi=10.1016/0166-6851(92)90205-x}} 29. ^{{cite journal | vauthors = Hsu YC, Chern JJ, Cai Y, Liu M, Choi KW | title = Drosophila TCTP is essential for growth and proliferation through regulation of dRheb GTPase | journal = Nature | volume = 445 | issue = 7129 | pages = 785–8 | year = 2007 | pmid = 17301792 | doi = 10.1038/nature05528 }} 30. ^{{cite journal | vauthors = Tuynder M, Susini L, Prieur S, Besse S, Fiucci G, Amson R, Telerman A | title = Biological models and genes of tumor reversion: cellular reprogramming through tpt1/TCTP and SIAH-1 | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 99 | issue = 23 | pages = 14976–81 | year = 2002 | pmid = 12399545 | pmc = 137530 | doi = 10.1073/pnas.222470799 }} 31. ^{{cite journal | vauthors = Amson R, Pece S, Lespagnol A, Vyas R, Mazzarol G, Tosoni D, Colaluca I, Viale G, Rodrigues-Ferreira S, Wynendaele J, Chaloin O, Hoebeke J, Marine JC, Di Fiore PP, Telerman A | title = Reciprocal repression between P53 and TCTP | journal = Nature Medicine | volume = 18 | issue = 1 | pages = 91–9 | date = December 2011 | pmid = 22157679 | doi = 10.1038/nm.2546 }} 32. ^{{cite journal | vauthors = Tuynder M, Susini L, Prieur S, Besse S, Fiucci G, Amson R, Telerman A | title = Biological models and genes of tumor reversion: cellular reprogramming through tpt1/TCTP and SIAH-1 | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 99 | issue = 23 | pages = 14976–81 | date = November 2002 | pmid = 12399545 | doi = 10.1073/pnas.222470799 | pmc=137530}} 33. ^{{cite journal | vauthors = Tuynder M, Fiucci G, Prieur S, Lespagnol A, Géant A, Beaucourt S, Duflaut D, Besse S, Susini L, Cavarelli J, Moras D, Amson R, Telerman A | title = Translationally controlled tumor protein is a target of tumor reversion | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 101 | issue = 43 | pages = 15364–9 | date = October 2004 | pmid = 15489264 | doi = 10.1073/pnas.0406776101 | pmc=523462}} 34. ^1 {{cite journal | vauthors = Susini L, Besse S, Duflaut D, Lespagnol A, Beekman C, Fiucci G, Atkinson AR, Busso D, Poussin P, Marine JC, Martinou JC, Cavarelli J, Moras D, Amson R, Telerman A | title = TCTP protects from apoptotic cell death by antagonizing bax function | journal = Cell Death and Differentiation | volume = 15 | issue = 8 | pages = 1211–20 | date = August 2008 | pmid = 18274553 | doi = 10.1038/cdd.2008.18 |authorlink1 = Laurent Susini }} 35. ^{{cite journal | vauthors = Thaw P, Baxter NJ, Hounslow AM, Price C, Waltho JP, Craven CJ | title = Structure of TCTP reveals unexpected relationship with guanine nucleotide-free chaperones | journal = Nature Structural Biology | volume = 8 | issue = 8 | pages = 701–4 | date = August 2001 | pmid = 11473261 | doi = 10.1038/90415 }} 36. ^{{cite book | vauthors = Telerman A, Amson R | title = TCTP/tpt1 - Remodeling Signaling from Stem Cell to Disease | journal = Results and Problems in Cell Differentiation | volume = vol 64 | pages = 9–46 | doi = 10.1007/978-3-319-67591-6_2| pmid = 29149402 | year = 2017 | isbn = 978-3-319-67590-9 }} 37. ^{{cite journal | vauthors = Liu H, Peng HW, Cheng YS, Yuan HS, Yang-Yen HF | title = Stabilization and enhancement of the antiapoptotic activity of mcl-1 by TCTP | journal = Molecular and Cellular Biology | volume = 25 | issue = 8 | pages = 3117–26 | date = April 2005 | pmid = 15798198 | doi = 10.1128/MCB.25.8.3117-3126.2005 | pmc=1069602}} 38. ^{{cite journal | vauthors = Thébault S, Agez M, Chi X, Stojko J, Cura V, Telerman SB, Maillet L, Gautier F, Billas-Massobrio I, Birck C, Troffer-Charlier N, Karafin T, Honoré J, Senff-Ribeiro A, Montessuit S, Johnson CM, Juin P, Cianférani S, Martinou JC, Andrews DW, Amson R, Telerman A, Cavarelli J | title = TCTP contains a BH3-like domain, which instead of inhibiting, activates Bcl-xL | journal = Scientific Reports | volume = 6 | pages = 19725 | date = January 2016 | pmid = 26813996 | doi = 10.1038/srep19725 | pmc=4728560}} Further reading{{refbegin|33em}}
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