組織蛋白酶L1

組織蛋白酶L1（英語：Cathepsin L1）是人類體內由CTSL1基因編碼的蛋白質。^[3][4][5]該蛋白質是木瓜樣蛋白酶（英語：Papain-like protease），是一種溶體半胱胺酸蛋白酶，在細胞內蛋白質分解代謝中起著主要的作用。^[6][7][8][9]

組織蛋白酶L1
已知的結構 PDB 人類UniProt搜尋: PDBe RCSB PDBID列表 1CJL、​1CS8、​1ICF、​1MHW、​2NQD、​2VHS、​2XU1、​2XU3、​2XU4、​2XU5、​2YJ2、​2YJ8、​2YJ9、​2YJB、​2YJC、​3BC3、​3H89、​3H8B、​3H8C、​3HHA、​3HWN、​3IV2、​3K24、​3KSE、​3OF8、​3OF9、​4AXL、​4AXM、​5F02、​5I4H
識別號
別名	CTSL；, CATL, CTSL1, MEP, cathepsin L
外部ID	OMIM：116880 HomoloGene：129366 GeneCards：CTSL
基因位置（人類） 染色體 9號染色體[1] 基因座 9q21.33 起始 87,724,051 bp[1] 終止 87,731,469 bp[1]
RNA表現模式
查閱更多表現資料
基因本體 分子功能 • fibronectin binding • 半胱胺酸型肽酶活性 • collagen binding • histone binding • serpin family protein binding • 肽酶活性 • 血漿蛋白結合 • cysteine-type endopeptidase activity • 水解酶活性 • proteoglycan binding • serine-type endopeptidase activity 細胞組分 • 細胞外區域 • endolysosome lumen • lysosomal lumen • 溶體 • 外排體 • 細胞核 • 細胞外空間 • collagen-containing extracellular matrix • 多囊泡體 • 細胞膜 生物學過程 • macrophage apoptotic process • antigen processing and presentation • 適應性免疫 • antigen processing and presentation of exogenous peptide antigen via MHC class II • extracellular matrix disassembly • 蛋白酶解 • toll-like receptor signaling pathway • cellular response to thyroid hormone stimulus • collagen catabolic process • proteolysis involved in cellular protein catabolic process • regulation of keratinocyte differentiation Sources:Amigo / QuickGO
直系同源
物種	人類	小鼠
Entrez	1514	無資料
Ensembl	ENSG00000135047	無資料
UniProt	P07711 Q9HBQ7	無資料
mRNA​序列	NM_001257971 ​NM_001257972 ​NM_001257973 ​NM_001912 ​NM_145918 ​NM_001382757 ​NM_001382758 ​NM_001382766 ​NM_001382767 ​NM_001382768	無資料
蛋白序列	NP_001244900 ​NP_001244901 ​NP_001244902 ​NP_001903 ​NP_666023 ​NP_001369686 ​NP_001369687 ​NP_001369695 ​NP_001369696 ​NP_001369697 NP_001244902.1	無資料
基因位置​（UCSC）	Chr 9: 87.72 – 87.73 Mb	無資料
PubMed​查找	[2]	無資料
維基資料
檢視/編輯人類

作用

組織蛋白酶L1是肽酶C1（組織蛋白酶）MEROPS家族的成員。組織蛋白酶L1在包括正常溶體介導的蛋白質周轉、抗原、前蛋白加工以及細胞凋亡在內的多種過程中發揮重要的作用。^[10]其受質包括膠原蛋白、彈性蛋白和SERPINA1（英語：Alpha-1 antitrypsin），這是嗜中性球彈性蛋白酶（英語：Neutrophil elastase）活性的主要控制元素。組織蛋白酶L1與多種病理過程有關，包括肌病（英語：Myopathy）、冠狀動脈疾病中的肌原纖維（英語：Myofibril）壞死以及腎小管對蛋白尿的反應。它是由二硫鍵連接的重鏈和輕鏈組成的二聚體，均由單一蛋白質前體產生。已發現該基因至少有兩種編碼相同蛋白質的轉錄變體。^[5]

病毒進入

病毒進入細胞需要2型新冠病毒S2棘蛋白的裂解。此過程可以通過位於細胞膜上的蛋白酶——跨膜絲胺酸蛋白酶2或內溶體中的組織蛋白酶（主要是組織蛋白酶L1）來完成。^[11]羥氯喹可以抑制內溶體中組織蛋白酶L1的作用，但由於與跨膜絲胺酸蛋白酶2裂解相比，組織蛋白酶L1的裂解較小，因此羥氯喹對2型新冠病毒感染的抑制作用很小。^[11]

炎症

雖然組織蛋白酶L1通常被表徵為溶體蛋白酶，但它可以被分泌，導致病理性炎症。^[12]組織蛋白酶L1和其他木瓜樣蛋白酶在引起病理性炎症時往往由巨噬細胞和其他侵入組織的免疫細胞分泌而出。^[13]

交互作用

組織蛋白酶L1已被證明與胱抑素A有相互作用。^[14][15]

分布

組織蛋白酶L1已在許多生物體中發現，包括魚類^[16]、鳥類、哺乳動物和海綿。^[17]

參見

• 組織蛋白酶V（或稱為組織蛋白酶L2或組織蛋白酶U）
• 組織蛋白酶

參考文獻

1. GRCh38: Ensembl release 89: ENSG00000135047 - Ensembl, May 2017
2. Human PubMed Reference:. National Center for Biotechnology Information, U.S. National Library of Medicine.
3. Chauhan SS, Popescu NC, Ray D, Fleischmann R, Gottesman MM, Troen BR. Cloning, genomic organization, and chromosomal localization of human cathepsin L. J Biol Chem. Feb 1993, 268 (2): 1039–45. PMID 8419312. doi:10.1016/S0021-9258(18)54038-2 .
4. Joseph LJ, Chang LC, Stamenkovich D, Sukhatme VP. Complete nucleotide and deduced amino acid sequences of human and murine preprocathepsin L. An abundant transcript induced by transformation of fibroblasts. J Clin Invest. Jun 1988, 81 (5): 1621–9. PMC 442598 . PMID 2835398. doi:10.1172/JCI113497.
5. Entrez Gene: CTSL1 cathepsin L1.
6. Barrett AJ, Kirschke H. Cathepsin B, Cathepsin H, and cathepsin L. Methods in Enzymology. 1981,. 80 Pt C: 535–561. PMID 7043200. doi:10.1016/s0076-6879(81)80043-2.
7. Barrett AJ, Buttle DJ, Mason RW. Lysosomal cysteine proteinases. ISI Atlas of Science. Biochemistry. 1988, 1: 256–260.
8. Joseph LJ, Chang LC, Stamenkovich D, Sukhatme VP. Complete nucleotide and deduced amino acid sequences of human and murine preprocathepsin L. An abundant transcript induced by transformation of fibroblasts. The Journal of Clinical Investigation. May 1988, 81 (5): 1621–1629. PMC 442598 . PMID 2835398. doi:10.1172/JCI113497.
9. Kirschke H, Wikstrom P, Shaw E. Active center differences between cathepsins L and B: the S1 binding region. FEBS Letters. February 1988, 228 (1): 128–130. PMID 3342870. doi:10.1016/0014-5793(88)80600-8 .
10. Dickinson DP. Cysteine Peptidases of Mammals: Their Biological Roles and Potential Effects in the Oral Cavity and Other Tissues in Health and Disease. Critical Reviews in Oral Biology and Medicine. 2002, 13 (3): 238–75. PMID 12090464. doi:10.1177/154411130201300304.
11. Jackson CB, Farzan M, Chen B, Choe H. Mechanisms of SARS-CoV-2 entry into cells. Nature Reviews. Molecular Cell Biology. January 2022, 23 (1): 3–20. PMC 8491763 . PMID 34611326. doi:10.1038/s41580-021-00418-x.
12. Gomes CP, Fernandes DE, Casimiro F, da Mata GF, Passos MT, Varela P, et al. Cathepsin L in COVID-19: From Pharmacological Evidences to Genetics. Frontiers in Cellular and Infection Microbiology. 2022, 10: 589505. PMC 7753008 . PMID 33364201. doi:10.3389/fcimb.2020.589505 .
13. Berdowska I, Matusiewicz M. Cathepsin L, transmembrane peptidase/serine subfamily member 2/4, and other host proteases in COVID-19 pathogenesis - with impact on gastrointestinal tract. World Journal of Gastroenterology. October 2021, 27 (39): 6590–6600. PMC 8554394 . PMID 34754154. doi:10.3748/wjg.v27.i39.6590.
14. Majerle, Andreja; Jerala Roman. Protein inhibitors form complexes with procathepsin L and augment cleavage of the propeptide. Arch. Biochem. Biophys. Sep 2003, 417 (1): 53–8. ISSN 0003-9861. PMID 12921779. doi:10.1016/S0003-9861(03)00319-9.
15. Estrada, S; Nycander M; Hill N J; Craven C J; Waltho J P; Björk I. The role of Gly-4 of human cystatin A (stefin A) in the binding of target proteinases. Characterization by kinetic and equilibrium methods of the interactions of cystatin A Gly-4 mutants with papain, cathepsin B, and cathepsin L. Biochemistry. May 1998, 37 (20): 7551–60. ISSN 0006-2960. PMID 9585570. doi:10.1021/bi980026r.
16. Venkatesh K, Prasanth B, Rajesh P, Annie JG, Mukesh P, Jesu A. A murrel cysteine protease, cathepsin L: bioinformatics characterization, gene expression and proteolytic activity. Biologia. 2014, 39 (3): 395–406. doi:10.2478/s11756-013-0326-8 .
17. Sevenich L, Pennacchio LA, Peters C, Reinheckel T. Human cathepsin L rescues the neurodegeneration and lethality in cathepsin B/L double-deficient mice. Biological Chemistry. July 2006, 387 (7): 885–91 [2022-10-31]. PMID 16913838. S2CID 27739485. doi:10.1515/BC.2006.112. （原始內容存檔於2022-10-31）.

拓展閱讀

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• Dunn AD, Crutchfield HE, Dunn JT. Thyroglobulin processing by thyroidal proteases. Major sites of cleavage by cathepsins B, D, and L.. J. Biol. Chem. 1991, 266 (30): 20198–204. PMID 1939080. doi:10.1016/S0021-9258(18)54909-7 .
• Stearns NA, Dong JM, Pan JX, et al. Comparison of cathepsin L synthesized by normal and transformed cells at the gene, message, protein, and oligosaccharide levels.. Arch. Biochem. Biophys. 1991, 283 (2): 447–57. PMID 2275556. doi:10.1016/0003-9861(90)90666-M.
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• Kärgel HJ, Dettmer R, Etzold G, et al. Action of rat liver cathepsin L on glucagon.. Acta Biol. Med. Ger. 1982, 40 (9): 1139–43. PMID 7340337.
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外部連結

• The MEROPS online database for peptidases and their inhibitors: C01.032^{[失效連結]}
• 醫學主題詞表（MeSH）：Cathepsin+L