Amilin

ostrvaca amiloidnog polipeptida
Dostupne strukture
	1KUW, 2G48, 2KB8, 2L86, 3FPO, 3FR1, 3FTH, 3FTK, 3FTL, 3FTR, 3G7V, 3G7W, 3HGZ
Identifikatori
Simboli	IAPP; DAP; IAP
Vanjski ID	OMIM: 147940 MGI: 96382 HomoloGene: 36024 GeneCards: IAPP Gene
Ontologija gena
Molekularna funkcija	• receptorsko vezivanje; • hormonska aktivnost;
Celularna komponenta	• ekstracelularni region; • ekstracelularni prostor; • neuronalno ćelijsko telo;
Biološki proces	• apoptotični proces; • prenos signala; • međućelijska signalizacija;
Pregled RNK izražavanja
	podaci
Ortolozi

edit

Amilin (ostrvaca amiloidnog polipeptida, IAPP) je 37 aminokiselina dug peptidni hormon. On se izlučuje zajedno sa insulinom iz pankreasnih β-ćelija u odnosu od oko 100:1.^[1] Amilin učestvuje u glicemičkog regulaciji putem usporavanja gastričkog pražnjenja i promovisanja sitosti, čime sprećava postprandijalna nagla povišenja nivoa krvne glukoze.

Aminokiselinska sekvenca amilina sa disulfidnim mostom i mestima presecanja enzima insulin degradiranja označenim strelicama

IAPP se formira iz 89 aminokiseline duge kodirajuće sekvence. Proostvce amiloidni polipeptid (proIAPP, proamilin, amiloidni polipeptidni prekurzor, proostrvce protein) se formira u pankreasnim beta-ćelijama kao peptid sa 67 aminokiselina, 7404 Daltona težak propeptid i on podleže posttranslacionoj modifikaciji uključujući proteazno presecanje da se formira amilin.^[2]

Reference

↑ „Entrez Gene: IAPP islet amyloid polypeptide”.
↑ Higham, C. E., Hull, R. L., Lawrie, L., Shennan, K. I. H., Morris, J. F., Birch, N. P., Dochery, K., & Clark, A. (2000). Processing of synthetic pro-islet amyloid polypeptide (proIAPP) `amylin' by recombinant prohormone convertase enzymes, PC2 and PC3, in vitro.. 267. European Journal of Biochemistry. pp. 4998–5004. Arhivirano iz originala na datum 2006-03-20. Pristupljeno 2014-04-07.

Literatura

Westermark P, Andersson A, Westermark GT (2005). „Is aggregated IAPP a cause of beta-cell failure in transplanted human pancreatic islets?”. Curr. Diab. Rep. 5 (3): 184–8. DOI:10.1007/s11892-005-0007-2. PMID 15929864.
Höppener JW, Oosterwijk C, Visser-Vernooy HJ, et al. (1993). „Characterization of the human islet amyloid polypeptide/amylin gene transcripts: identification of a new polyadenylation site”. Biochem. Biophys. Res. Commun. 189 (3): 1569–77. DOI:10.1016/0006-291X(92)90255-J. PMID 1282806.
Hubbard JA, Martin SR, Chaplin LC, et al. (1991). „Solution structures of calcitonin-gene-related-peptide analogues of calcitonin-gene-related peptide and amylin”. Biochem. J. 275 (Pt 3): 785–8. PMC 1150122. PMID 2039456.
Butler PC, Chou J, Carter WB, et al. (1990). „Effects of meal ingestion on plasma amylin concentration in NIDDM and nondiabetic humans”. Diabetes 39 (6): 752–6. DOI:10.2337/diabetes.39.6.752. PMID 2189768.
van Mansfeld AD, Mosselman S, Höppener JW, et al. (1990). „Islet amyloid polypeptide: structure and upstream sequences of the IAPP gene in rat and man”. Biochim. Biophys. Acta 1087 (2): 235–40. DOI:10.1016/0167-4781(90)90210-S. PMID 2223885.
Christmanson L, Rorsman F, Stenman G, et al. (1990). „The human islet amyloid polypeptide (IAPP) gene. Organization, chromosomal localization and functional identification of a promoter region”. FEBS Lett. 267 (1): 160–6. DOI:10.1016/0014-5793(90)80314-9. PMID 2365085.
Clark A, Edwards CA, Ostle LR, et al. (1989). „Localisation of islet amyloid peptide in lipofuscin bodies and secretory granules of human B-cells and in islets of type-2 diabetic subjects”. Cell Tissue Res. 257 (1): 179–85. DOI:10.1007/BF00221649. PMID 2546670.
Nishi M, Sanke T, Seino S, et al. (1990). „Human islet amyloid polypeptide gene: complete nucleotide sequence, chromosomal localization, and evolutionary history”. Mol. Endocrinol. 3 (11): 1775–81. DOI:10.1210/mend-3-11-1775. PMID 2608057.
Mosselman S, Höppener JW, Lips CJ, Jansz HS (1989). „The complete islet amyloid polypeptide precursor is encoded by two exons”. FEBS Lett. 247 (1): 154–8. DOI:10.1016/0014-5793(89)81260-8. PMID 2651160.
Westermark P, Wernstedt C, Wilander E, et al. (1987). „Amyloid fibrils in human insulinoma and islets of Langerhans of the diabetic cat are derived from a neuropeptide-like protein also present in normal islet cells”. Proc. Natl. Acad. Sci. U.S.A. 84 (11): 3881–5. DOI:10.1073/pnas.84.11.3881. PMC 304980. PMID 3035556.
Mosselman S, Höppener JW, Zandberg J, et al. (1988). „Islet amyloid polypeptide: identification and chromosomal localization of the human gene”. FEBS Lett. 239 (2): 227–32. DOI:10.1016/0014-5793(88)80922-0. PMID 3181427.
Cooper GJ, Willis AC, Clark A, et al. (1988). „Purification and characterization of a peptide from amyloid-rich pancreases of type 2 diabetic patients”. Proc. Natl. Acad. Sci. U.S.A. 84 (23): 8628–32. DOI:10.1073/pnas.84.23.8628. PMC 299599. PMID 3317417.
Westermark P, Wernstedt C, Wilander E, Sletten K (1986). „A novel peptide in the calcitonin gene related peptide family as an amyloid fibril protein in the endocrine pancreas”. Biochem. Biophys. Res. Commun. 140 (3): 827–31. DOI:10.1016/0006-291X(86)90708-4. PMID 3535798.
Höppener JW, Verbeek JS, de Koning EJ, et al. (1994). „Chronic overproduction of islet amyloid polypeptide/amylin in transgenic mice: lysosomal localization of human islet amyloid polypeptide and lack of marked hyperglycaemia or hyperinsulinaemia”. Diabetologia 36 (12): 1258–65. DOI:10.1007/BF00400803. PMID 8307253.
Lim YA, Ittner LM, Lim YL, Götz J. (2008). „Human but not rat amylin shares neurotoxic properties with Abeta42 in long-term hippocampal and cortical cultures”. FEBS Lett 582 (15): 2188–2194. DOI:10.1016/j.febslet.2008.05.006. PMID 18486611.

Povezano

Vanjske veze

MeSH amylin
„Amylin Nucleation Site”. PDB entry 1KUW. RCSB Protein Data Bank. Arhivirano iz originala na datum 2008-04-16. Pristupljeno 28. 5. 2008.

[1] „Entrez Gene: IAPP islet amyloid polypeptide”.

[Higham-2] Higham, C. E., Hull, R. L., Lawrie, L., Shennan, K. I. H., Morris, J. F., Birch, N. P., Dochery, K., & Clark, A. (2000). Processing of synthetic pro-islet amyloid polypeptide (proIAPP) `amylin' by recombinant prohormone convertase enzymes, PC2 and PC3, in vitro.. 267. European Journal of Biochemistry. pp. 4998–5004. Arhivirano iz originala na datum 2006-03-20. Pristupljeno 2014-04-07.

[1]