Timopoetin je protein uključen u indukciju CD90 u timusu. Gen timopoetina (TMPO) kodira tri alternativno prerađene iRNK koje kodiraju proteine od 75 kDa (alfa), 51 kDa (beta) i 39 kDa (gama) koji se sveprisutno ispoljavaju u svim ćelijama. Ljudski gen TMPO nalazi se na hromosomskoj poziciji 12q22 i sastoji se od osam egzona.
Kratke činjenice TMPO, Dostupne strukture ...
Zatvori
Gen TMPO, kod ljudi kodira polipeptid 2 povezan sa laminom (LAP2), izoforme beta/ gama.[5][6] LAP2 je protein unutrašnje jedarne membrane (IN).[7]
TMPO alfa prisutan je difuzno eksprimiran u ćelijskoom jedru, dok su TMPO beta i gama lokalizirani u jedarnoj membrani. TMPO beta je ljudski homolog mišjeg proteina LAP2. LAP2 igra ulogu u regulaciji jedarne arhitekture vezanjem lamina B1 i hromosome. Ova interakcija je regulirana fosforilacijom tokom mitoze. S obzirom na jedarnu lokalizaciju tri izoforme TMPO, malo je vjerojatno da ovi proteini imaju bilo kakvu ulogu u indukciji CD90.
U timusu nastaje nekoliko tvari s hormonskim djelovanjem, od kojih su poznatiji timozini i timopoetin, ali njihova funkcija još nije posve razjašnjena.Misli se da te tvari vjerojatno reguliraju mnogobrojne fiziološke procese, kao što su diferencijacija timocita, regulacija funkcije limfocita u perifernim limfnim organima, djelovanje na nervni i endokrini sistem, obnavljanje oštećenih krvnih sudova.
Pokazano je da timopoetin međureagira sa Brijerom za faktor integracije 1,[8] AKAP8L,[9][10] LMNB1[11][12] and LMNA.[13][14]
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- Goldstein G, Schlesinger DH, Audhya T (Jun 1994). "Isolation and complete amino acid sequence of human thymopoietin and splenin". Proceedings of the National Academy of Sciences of the United States of America. 91 (13): 6249. doi:10.1073/pnas.91.13.6249. PMC 44176. PMID 8016147.
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- Andersson B, Wentland MA, Ricafrente JY, Liu W, Gibbs RA (Apr 1996). "A "double adaptor" method for improved shotgun library construction". Analytical Biochemistry. 236 (1): 107–13. doi:10.1006/abio.1996.0138. PMID 8619474.
- Berger R, Theodor L, Shoham J, Gokkel E, Brok-Simoni F, Avraham KB, Copeland NG, Jenkins NA, Rechavi G, Simon AJ (maj 1996). "The characterization and localization of the mouse thymopoietin/lamina-associated polypeptide 2 gene and its alternatively spliced products". Genome Research. 6 (5): 361–70. doi:10.1101/gr.6.5.361. PMID 8743987.
- Yu W, Andersson B, Worley KC, Muzny DM, Ding Y, Liu W, Ricafrente JY, Wentland MA, Lennon G, Gibbs RA (Apr 1997). "Large-scale concatenation cDNA sequencing". Genome Research. 7 (4): 353–8. doi:10.1101/gr.7.4.353. PMC 139146. PMID 9110174.
- Furukawa K, Fritze CE, Gerace L (Feb 1998). "The major nuclear envelope targeting domain of LAP2 coincides with its lamin binding region but is distinct from its chromatin interaction domain". The Journal of Biological Chemistry. 273 (7): 4213–9. doi:10.1074/jbc.273.7.4213. PMID 9461618.
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- Dechat T, Gotzmann J, Stockinger A, Harris CA, Talle MA, Siekierka JJ, Foisner R (Aug 1998). "Detergent-salt resistance of LAP2alpha in interphase nuclei and phosphorylation-dependent association with chromosomes early in nuclear assembly implies functions in nuclear structure dynamics". The EMBO Journal. 17 (16): 4887–902. doi:10.1093/emboj/17.16.4887. PMC 1170818. PMID 9707448.
- Furukawa K (Aug 1999). "LAP2 binding protein 1 (L2BP1/BAF) is a candidate mediator of LAP2-chromatin interaction". Journal of Cell Science. 112 ( Pt 15) (15): 2485–92. PMID 10393804.
- Weber PJ, Eckhard CP, Gonser S, Otto H, Folkers G, Beck-Sickinger AG (Jun 1999). "On the role of thymopoietins in cell proliferation. Immunochemical evidence for new members of the human thymopoietin family". Biological Chemistry. 380 (6): 653–60. doi:10.1515/BC.1999.081. PMID 10430029.
- Dechat T, Korbei B, Vaughan OA, Vlcek S, Hutchison CJ, Foisner R (Oct 2000). "Lamina-associated polypeptide 2alpha binds intranuclear A-type lamins". Journal of Cell Science. 113 Pt 19 (19): 3473–84. PMID 10984438.
- Martins SB, Eide T, Steen RL, Jahnsen T, Skålhegg BS, Collas P (Nov 2000). "HA95 is a protein of the chromatin and nuclear matrix regulating nuclear envelope dynamics". Journal of Cell Science. 113 Pt 21 (21): 3703–13. PMID 11034899.