| Structural highlights
Disease
TTHY_HUMAN Defects in TTR are the cause of amyloidosis transthyretin-related (AMYL-TTR) [MIM:105210. A hereditary generalized amyloidosis due to transthyretin amyloid deposition. Protein fibrils can form in different tissues leading to amyloid polyneuropathies, amyloidotic cardiomyopathy, carpal tunnel syndrome, systemic senile amyloidosis. The disease includes leptomeningeal amyloidosis that is characterized by primary involvement of the central nervous system. Neuropathologic examination shows amyloid in the walls of leptomeningeal vessels, in pia arachnoid, and subpial deposits. Some patients also develop vitreous amyloid deposition that leads to visual impairment (oculoleptomeningeal amyloidosis). Clinical features include seizures, stroke-like episodes, dementia, psychomotor deterioration, variable amyloid deposition in the vitreous humor.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] Defects in TTR are a cause of hyperthyroxinemia dystransthyretinemic euthyroidal (HTDE) [MIM:145680. It is a condition characterized by elevation of total and free thyroxine in healthy, euthyroid persons without detectable binding protein abnormalities.[73] Defects in TTR are a cause of carpal tunnel syndrome type 1 (CTS1) [MIM:115430. It is a condition characterized by entrapment of the median nerve within the carpal tunnel. Symptoms include burning pain and paresthesias involving the ventral surface of the hand and fingers which may radiate proximally. Impairment of sensation in the distribution of the median nerve and thenar muscle atrophy may occur. This condition may be associated with repetitive occupational trauma, wrist injuries, amyloid neuropathies, rheumatoid arthritis.[74]
Function
TTHY_HUMAN Thyroid hormone-binding protein. Probably transports thyroxine from the bloodstream to the brain.[75]
Publication Abstract from PubMed
Transthyretin (TTR) is a tetrameric protein associated with human amyloidosis. In vitro, the formation of amyloid fibrils by TTR is known to be promoted by low pH. Here we show the neutron structure of TTR, focusing on the hydrogen bonds, protonation states and pH sensitivities. A large crystal was prepared at pD 7.4 for neutron protein crystallography. Neutron diffraction studies were conducted using the IBARAKI Biological Crystal Diffractometer with the time-of-flight method. The neutron structure solved at 2.0A resolution revealed the protonation states of His88 and the detailed hydrogen-bond network depending on the protonation states of His88. This hydrogen-bond network is composed of Thr75, Trp79, His88, Ser112, Pro113, Thr118-B and four water molecules, and is involved in both monomer-monomer and dimer-dimer interactions, suggesting that the double protonation of His88 by acidification breaks the hydrogen-bond network and causes the destabilization of the TTR tetramer. In addition, the comparison with X-ray structure at pH 4.0 indicated that the protonation occurred to Asp74, His88 and Glu89 at pH 4.0. Our neutron model provides insights into the molecular stability of TTR related to the hydrogen-bond network, the pH sensitivity and the CH...O weak hydrogen bond.
Hydrogen-bond network and pH sensitivity in transthyretin: Neutron crystal structure of human transthyretin.,Yokoyama T, Mizuguchi M, Nabeshima Y, Kusaka K, Yamada T, Hosoya T, Ohhara T, Kurihara K, Tomoyori K, Tanaka I, Niimura N J Struct Biol. 2012 Feb;177(2):283-90. Epub 2012 Jan 11. PMID:22248451[76]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
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- ↑ Saraiva MJ, Almeida Mdo R, Sherman W, Gawinowicz M, Costa P, Costa PP, Goodman DS. A new transthyretin mutation associated with amyloid cardiomyopathy. Am J Hum Genet. 1992 May;50(5):1027-30. PMID:1570831
- ↑ Murakami T, Maeda S, Yi S, Ikegawa S, Kawashima E, Onodera S, Shimada K, Araki S. A novel transthyretin mutation associated with familial amyloidotic polyneuropathy. Biochem Biophys Res Commun. 1992 Jan 31;182(2):520-6. PMID:1734866
- ↑ Murakami T, Atsumi T, Maeda S, Tanase S, Ishikawa K, Mita S, Kumamoto T, Araki S, Ando M. A novel transthyretin mutation at position 30 (Leu for Val) associated with familial amyloidotic polyneuropathy. Biochem Biophys Res Commun. 1992 Aug 31;187(1):397-403. PMID:1520326
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- ↑ Benson MD 2nd, Turpin JC, Lucotte G, Zeldenrust S, LeChevalier B, Benson MD. A transthyretin variant (alanine 71) associated with familial amyloidotic polyneuropathy in a French family. J Med Genet. 1993 Feb;30(2):120-2. PMID:8095302
- ↑ Skare JC, Milunsky JM, Milunsky A, Skare IB, Cohen AS, Skinner M. A new transthyretin variant from a patient with familial amyloidotic polyneuropathy has asparagine substituted for histidine at position 90. Clin Genet. 1991 Jan;39(1):6-12. PMID:1997217
- ↑ Jacobson DR, Buxbaum JN. A double-variant transthyretin allele (Ser 6, Ile 33) in the Israeli patient "SKO" with familial amyloidotic polyneuropathy. Hum Mutat. 1994;3(3):254-60. PMID:8019560 doi:https://dx.doi.org/10.1002/humu.1380030313
- ↑ Jacobson DR, Gertz MA, Buxbaum JN. Transthyretin VAL107, a new variant associated with familial cardiac and neuropathic amyloidosis. Hum Mutat. 1994;3(4):399-401. PMID:8081397 doi:https://dx.doi.org/10.1002/humu.1380030414
- ↑ Uemichi T, Gertz MA, Benson MD. Amyloid polyneuropathy in two German-American families: a new transthyretin variant (Val 107). J Med Genet. 1994 May;31(5):416-7. PMID:7914929
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- ↑ Booth DR, Gillmore JD, Persey MR, Booth SE, Cafferty KD, Tennent GA, Madhoo S, Cochrane SW, Whitehead TC, Pasvol G, Hawkins PN. Transthyretin Ile73Val is associated with familial amyloidotic polyneuropathy in a Bangladeshi family. Mutations in brief no. 158. Online. Hum Mutat. 1998;12(2):135. PMID:10694917 doi:<135::AID-HUMU10>3.0.CO;2-6 10.1002/(SICI)1098-1004(1998)12:2<135::AID-HUMU10>3.0.CO;2-6
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- ↑ Brett M, Persey MR, Reilly MM, Revesz T, Booth DR, Booth SE, Hawkins PN, Pepys MB, Morgan-Hughes JA. Transthyretin Leu12Pro is associated with systemic, neuropathic and leptomeningeal amyloidosis. Brain. 1999 Feb;122 ( Pt 2):183-90. PMID:10071047
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- ↑ Nakamura M, Hamidi Asl K, Benson MD. A novel variant of transthyretin (Glu89Lys) associated with familial amyloidotic polyneuropathy. Amyloid. 2000 Mar;7(1):46-50. PMID:10842705
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- ↑ Yazaki M, Varga J, Dyck PJ, Benson MD. A new transthyretin variant Leu55Gln in a patient with systemic amyloidosis. Amyloid. 2002 Dec;9(4):268-71. PMID:12557757
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- ↑ Blevins G, Macaulay R, Harder S, Fladeland D, Yamashita T, Yazaki M, Hamidi Asl K, Benson MD, Donat JR. Oculoleptomeningeal amyloidosis in a large kindred with a new transthyretin variant Tyr69His. Neurology. 2003 May 27;60(10):1625-30. PMID:12771253
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- ↑ Bergen HR 3rd, Zeldenrust SR, Butz ML, Snow DS, Dyck PJ, Dyck PJ, Klein CJ, O'Brien JF, Thibodeau SN, Muddiman DC. Identification of transthyretin variants by sequential proteomic and genomic analysis. Clin Chem. 2004 Sep;50(9):1544-52. Epub 2004 Jun 24. PMID:15217993 doi:10.1373/clinchem.2004.033266
- ↑ Rosenzweig M, Skinner M, Prokaeva T, Theberge R, Costello C, Drachman BM, Connors LH. A new transthyretin variant (Glu61Gly) associated with cardiomyopathy. Amyloid. 2007 Mar;14(1):65-71. PMID:17453626 doi:775700621
- ↑ Bergstrom J, Patrosso MC, Colussi G, Salvadore M, Penco S, Lando G, Marocchi A, Ueda A, Nakamura M, Ando Y. A novel type of familial transthyretin amyloidosis, ATTR Asn124Ser, with co-localization of kappa light chains. Amyloid. 2007 Jun;14(2):141-5. PMID:17577687 doi:779687106
- ↑ Altland K, Benson MD, Costello CE, Ferlini A, Hazenberg BP, Hund E, Kristen AV, Linke RP, Merlini G, Salvi F, Saraiva MJ, Singer R, Skinner M, Winter P. Genetic microheterogeneity of human transthyretin detected by IEF. Electrophoresis. 2007 Jun;28(12):2053-64. PMID:17503405 doi:10.1002/elps.200600840
- ↑ Augustin S, Llige D, Andreu A, Gonzalez A, Genesca J. Familial amyloidosis in a large Spanish kindred resulting from a D38V mutation in the transthyretin gene. Eur J Clin Invest. 2007 Aug;37(8):673-8. PMID:17635579 doi:ECI1836
- ↑ Moses AC, Rosen HN, Moller DE, Tsuzaki S, Haddow JE, Lawlor J, Liepnieks JJ, Nichols WC, Benson MD. A point mutation in transthyretin increases affinity for thyroxine and produces euthyroid hyperthyroxinemia. J Clin Invest. 1990 Dec;86(6):2025-33. PMID:1979335 doi:https://dx.doi.org/10.1172/JCI114938
- ↑ Murakami T, Tachibana S, Endo Y, Kawai R, Hara M, Tanase S, Ando M. Familial carpal tunnel syndrome due to amyloidogenic transthyretin His 114 variant. Neurology. 1994 Feb;44(2):315-8. PMID:8309582
- ↑ Herbert J, Wilcox JN, Pham KT, Fremeau RT Jr, Zeviani M, Dwork A, Soprano DR, Makover A, Goodman DS, Zimmerman EA, et al.. Transthyretin: a choroid plexus-specific transport protein in human brain. The 1986 S. Weir Mitchell award. Neurology. 1986 Jul;36(7):900-11. PMID:3714052
- ↑ Yokoyama T, Mizuguchi M, Nabeshima Y, Kusaka K, Yamada T, Hosoya T, Ohhara T, Kurihara K, Tomoyori K, Tanaka I, Niimura N. Hydrogen-bond network and pH sensitivity in transthyretin: Neutron crystal structure of human transthyretin. J Struct Biol. 2012 Feb;177(2):283-90. Epub 2012 Jan 11. PMID:22248451 doi:https://dx.doi.org/10.1016/j.jsb.2011.12.022
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