肌聯蛋白

Ttn
已知的結構
PDB	人類UniProt搜尋: PDBe RCSB
PDBID列表
	4UOW、1BPV、1G1C、1NCT、1NCU、1TIT、1TIU、1TKI、1TNM、1TNN、1WAA、1YA5、2A38、2BK8、2F8V、2ILL、2J8H、2J8O、2NZI、2RQ8、2WP3、2WWK、2WWM、2Y9R、3KNB、3LCY、3LPW、3PUC、3Q5O、3QP3、4C4K、4JNW、4O00、4QEG、5BS0
識別號
別名	；titin1100001C23Rik2310036G12Rik2310057K23Rik2310074I15RikAF006999AV006427D330041I19RikD830007G01RikL56mdmshru
外部ID	HomoloGene：130650 GeneCards：[1]
EC number	2.7.11.1
基因位置（人類）
染色體	2號染色體
終止	76,982,547 bp
基因本體
分子功能	• 轉移酶活性; • 核苷酸結合; • calcium ion binding; • 蛋白激酶活性; • actinin binding; • muscle alpha-actinin binding; • structural molecule activity conferring elasticity; • 金屬離子結合; • telethonin binding; • 蛋白酶結合; • 蛋白質自締合; • actin filament binding; • 蛋白質絲氨酸/蘇氨酸激酶活性; • 激酶活性; • 血漿蛋白結合; • 相同蛋白質結合; • 酶結合; • protein tyrosine kinase activity; • structural constituent of muscle; • ATP結合; • protein kinase binding; • calmodulin binding; • structural constituent of cytoskeleton; • ankyrin binding;
細胞組分	• 細胞質; • 細胞質基質; • I band; • striated muscle thin filament; • condensed nuclear chromosome; • 細胞外區域; • Z discdkac; • muscle myosin complex; • 外排體; • 細胞核; • M band; • 肌節; • A band; • 肌原纖維;
生物學過程	• sarcomerogenesis; • 肌肉收縮; • mitotic chromosome condensation; • cardiac muscle contraction; • 磷酸化; • cardiac muscle hypertrophy; • platelet degranulation; • cardiac muscle tissue morphogenesis; • skeletal muscle thin filament assembly; • detection of muscle stretch; • response to calcium ion; • cardiac myofibril assembly; • protein phosphorylation; • muscle filament sliding; • regulation of protein kinase activity; • regulation of catalytic activity; • sarcomere organization; • skeletal muscle myosin thick filament assembly; • striated muscle contraction; • peptidyl-tyrosine phosphorylation; • positive regulation of gene expression; • protein kinase A signaling; • positive regulation of protein secretion; • somitogenesis; • ventricular system development; • in utero embryonic development; • heart morphogenesis; • striated muscle cell development; • heart growth; • adult heart development; • forward locomotion; • 心臟發育; • regulation of relaxation of cardiac muscle; • actin filament organization; • striated muscle myosin thick filament assembly;
	Sources:Amigo / QuickGO
直系同源
	22138
	無數據
	ENSMUSG00000051747
	無數據
	Q8WZ42
	無數據
	NM_011652; NM_028004
	無數據
NP_001243779; NP_001254479; NP_003310; NP_596869; NP_596870;
	NP_597676; NP_597681; NP_035782; NP_082280; NP_001372637
	無數據
	維基數據
檢視/編輯人類

肌聯蛋白（英語：titin，源自古希臘神話中的泰坦，形容其結構的巨大程度^[2]。又稱 connectin），又稱肌巨蛋白，是人體中是由肌聯蛋白基因（TTN）編碼的蛋白質。^[3]^[4]肌聯蛋白是已知最巨大的蛋白質，為肌肉收縮的彈性元件。它由244個結構域以及之間的肽序列連接組成。^[5]這些結構域在蛋白拉伸時去摺疊，而在張力去除後重新摺疊。^[6]

肌聯蛋白是已知最大的蛋白質^[7]，同時肌聯蛋白基因也擁有已知的單基因中最多的外顯子（363個）。^[8]

肌聯蛋白對橫紋肌的收縮很重要，它橫跨肌節從Z線到M線的區域，同粗肌絲的裝配和位置固定有關。在這個基因的突變能引起肌肉疾病，例如肢帶型肌營養不良。^[9]

另見

名稱獨特的化學物質列表

參考文獻

^ Human PubMed Reference:. National Center for Biotechnology Information, U.S. National Library of Medicine.
^ Wang K, McClure J, Tu A. Titin: major myofibrillar components of striated muscle. Proceedings of the National Academy of Sciences of the United States of America. August 1979, 76 (8): 3698–702. Bibcode:1979PNAS...76.3698W. PMC 383900 . PMID 291034. doi:10.1073/pnas.76.8.3698 .
^ Entrez Gene: TTN titin. （原始內容存檔於2010-03-07）.
^ Labeit S, Barlow DP, Gautel M, Gibson T, Holt J, Hsieh CL, Francke U, Leonard K, Wardale J, Whiting A. A regular pattern of two types of 100-residue motif in the sequence of titin. Nature. May 1990, 345 (6272): 273–6. PMID 2129545. doi:10.1038/345273a0.
^ Labeit S, Kolmerer B. Titins: giant proteins in charge of muscle ultrastructure and elasticity. Science. October 1995, 270 (5234): 293–6. PMID 7569978. doi:10.1126/science.270.5234.293.
^ Minajeva A, Kulke M, Fernandez JM, Linke WA. Unfolding of titin domains explains the viscoelastic behavior of skeletal myofibrils. Biophys. J. March 2001, 80 (3): 1442–51. PMC 1301335 . PMID 11222304. doi:10.1016/S0006-3495(01)76116-4.
^ Opitz CA, Kulke M, Leake MC, Neagoe C, Hinssen H, Hajjar RJ, Linke WA. Damped elastic recoil of the titin spring in myofibrils of human myocardium. Proc. Natl. Acad. Sci. U.S.A. October 2003, 100 (22): 12688–93. PMC 240679 . PMID 14563922. doi:10.1073/pnas.2133733100.
^ Bang ML, Centner T, Fornoff F, Geach AJ, Gotthardt M, McNabb M, Witt CC, Labeit D, Gregorio CC, Granzier H, Labeit S. The complete gene sequence of titin, expression of an unusual approximately 700-kDa titin isoform, and its interaction with obscurin identify a novel Z-line to I-band linking system. Circ. Res. November 2001, 89 (11): 1065–72. PMID 11717165. doi:10.1161/hh2301.100981.
^ Finsterer J. Klinik und Genetik der Gliedergürteldystrophien. Nervenarzt. December, 75 (12): 1153–66. doi:10.1007/s00115-004-1769-5. 請檢查|date=中的日期值 (幫助)

[1] Human PubMed Reference:. National Center for Biotechnology Information, U.S. National Library of Medicine.

[Wang_1979-2] Wang K, McClure J, Tu A. Titin: major myofibrillar components of striated muscle. Proceedings of the National Academy of Sciences of the United States of America. August 1979, 76 (8): 3698–702. Bibcode:1979PNAS...76.3698W. PMC 383900 . PMID 291034. doi:10.1073/pnas.76.8.3698 .

[Entrez_7273-3] Entrez Gene: TTN titin. （原始內容存檔於2010-03-07）.

[pmid2129545-4] Labeit S, Barlow DP, Gautel M, Gibson T, Holt J, Hsieh CL, Francke U, Leonard K, Wardale J, Whiting A. A regular pattern of two types of 100-residue motif in the sequence of titin. Nature. May 1990, 345 (6272): 273–6. PMID 2129545. doi:10.1038/345273a0.

[pmid7569978-5] Labeit S, Kolmerer B. Titins: giant proteins in charge of muscle ultrastructure and elasticity. Science. October 1995, 270 (5234): 293–6. PMID 7569978. doi:10.1126/science.270.5234.293.

[pmid11222304-6] Minajeva A, Kulke M, Fernandez JM, Linke WA. Unfolding of titin domains explains the viscoelastic behavior of skeletal myofibrils. Biophys. J. March 2001, 80 (3): 1442–51. PMC 1301335 . PMID 11222304. doi:10.1016/S0006-3495(01)76116-4.

[pmid14563922-7] Opitz CA, Kulke M, Leake MC, Neagoe C, Hinssen H, Hajjar RJ, Linke WA. Damped elastic recoil of the titin spring in myofibrils of human myocardium. Proc. Natl. Acad. Sci. U.S.A. October 2003, 100 (22): 12688–93. PMC 240679 . PMID 14563922. doi:10.1073/pnas.2133733100.

[pmid11717165-8] Bang ML, Centner T, Fornoff F, Geach AJ, Gotthardt M, McNabb M, Witt CC, Labeit D, Gregorio CC, Granzier H, Labeit S. The complete gene sequence of titin, expression of an unusual approximately 700-kDa titin isoform, and its interaction with obscurin identify a novel Z-line to I-band linking system. Circ. Res. November 2001, 89 (11): 1065–72. PMID 11717165. doi:10.1161/hh2301.100981.

[Gliedergürteldystrophie-9] Finsterer J. Klinik und Genetik der Gliedergürteldystrophien. Nervenarzt. December, 75 (12): 1153–66. doi:10.1007/s00115-004-1769-5. 請檢查|date=中的日期值 (幫助)

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