胱天蛋白酶6

位於4號人類染色體的基因

胱天蛋白酶6英语:Caspase 6)是人类中由CASP6基因编码的一种[5][6]许多可获得完整基因组数据的哺乳动物中都已鉴定出CASP6直向同源物[7]鸟类蜥蜴滑体动物真骨类中也存在独特的直系同源物。胱天蛋白酶6在亨廷顿舞蹈症阿茲海默症细胞凋亡[8]早期免疫反应[9][10]神经变性中具有重要功能。[11]

胱天蛋白酶6
已知的结构
PDB直系同源搜索: PDBe RCSB
识别号
别名CASP6;, MCH2, Caspase 6, CSP-6
外部IDOMIM601532 MGI1312921 HomoloGene37455 GeneCardsCASP6
基因位置(人类
4号染色体
染色体4号染色体[1]
4号染色体
胱天蛋白酶6的基因位置
胱天蛋白酶6的基因位置
基因座4q25起始109,688,622 bp[1]
终止109,703,583 bp[1]
RNA表达模式


查阅更多表达数据
直系同源
物种人类小鼠
Entrez
Ensembl
UniProt
mRNA​序列

NM_001226
​NM_032992

NM_009811

蛋白序列

NP_001217
​NP_116787

NP_033941

基因位置​(UCSC)Chr 4: 109.69 – 109.7 MbChr 3: 129.7 – 129.71 Mb
PubMed​查找[3][4]
维基数据
查看/编辑人类查看/编辑小鼠

作用

该基因编码的蛋白质是胱天蛋白酶家族的成员。胱天蛋白酶的连续激活在细胞凋亡的执行阶段发挥着核心作用。[8]胱天蛋白酶以无活性的酶原形式存在,在保守的天冬氨酸残基处经历蛋白水解加工,产生一大一小两个亚基,然后二聚化形成活性酶。该蛋白由胱天蛋白酶7810加工,被认为是胱天蛋白酶激活级联中的下游酶。胱天蛋白酶6也可以在没有胱天蛋白酶家族其他成员的情况下进行自我加工。[12]该基因的选择性剪接产生了编码不同亚型的两个转录变体。[13]

胱天蛋白酶6通过去抑制在早期免疫反应中发挥作用。它降低免疫抑制剂细胞因子白细胞介素10[9]的表达,并裂解巨噬细胞上表达的IRAK-M来抑制巨噬细胞。[10]

对于神经变性,胱天蛋白酶6可以裂解亨廷顿舞蹈症中的亨廷顿蛋白(HTT)和阿茲海默症中的前类淀粉蛋白质(APP)。这两种情况都会导致片段的蛋白质聚集[11]

相互作用

胱天蛋白酶6已被证明与胱天蛋白酶8发生相互作用[14][15][16]

参见

参考文献

  1. ^ 1.0 1.1 1.2 GRCh38: Ensembl release 89: ENSG00000138794 - Ensembl, May 2017
  2. ^ 2.0 2.1 2.2 GRCm38: Ensembl release 89: ENSMUSG00000027997 - Ensembl, May 2017
  3. ^ Human PubMed Reference:. National Center for Biotechnology Information, U.S. National Library of Medicine. 
  4. ^ Mouse PubMed Reference:. National Center for Biotechnology Information, U.S. National Library of Medicine. 
  5. ^ Tiso N, Pallavicini A, Muraro T, Zimbello R, Apolloni E, Valle G, Lanfranchi G, Danieli GA. Chromosomal localization of the human genes, CPP32, Mch2, Mch3, and Ich-1, involved in cellular apoptosis. Biochem Biophys Res Commun. Oct 1996, 225 (3): 983–9. PMID 8780721. doi:10.1006/bbrc.1996.1282. 
  6. ^ Fernandes-Alnemri T, Litwack G, Alnemri ES. Mch2, a new member of the apoptotic Ced-3/Ice cysteine protease gene family. Cancer Res. Aug 1995, 55 (13): 2737–42. PMID 7796396. 
  7. ^ OrthoMaM phylogenetic marker: CASP6 coding sequence. [2009-12-20]. (原始内容存档于2016-03-03). 
  8. ^ 8.0 8.1 Cohen, Gerald M. Caspases: the executioners of apoptosis. Biochemical Journal. 1997-08-15, 326 (1): 1–16. ISSN 0264-6021. PMC 1218630 . PMID 9337844. doi:10.1042/bj3260001 (英语). 
  9. ^ 9.0 9.1 Bartel, Alexander; Göhler, André; Hopf, Verena; Breitbach, Katrin. Caspase-6 mediates resistance against Burkholderia pseudomallei infection and influences the expression of detrimental cytokines. PLOS ONE. 2017-07-07, 12 (7): e0180203. Bibcode:2017PLoSO..1280203B. ISSN 1932-6203. PMC 5501493 . PMID 28686630. doi:10.1371/journal.pone.0180203 . 
  10. ^ 10.0 10.1 Kobayashi, Hiroshi; Nolan, Anna; Naveed, Bushra; Hoshino, Yoshihiko; Segal, Leopoldo N.; Fujita, Yoko; Rom, William N.; Weiden, Michael D. Neutrophils Activate Alveolar Macrophages by Producing Caspase-6–Mediated Cleavage of IL-1 Receptor-Associated Kinase-M. The Journal of Immunology. 2011-01-01, 186 (1): 403–410. ISSN 0022-1767. PMC 3151149 . PMID 21098228. doi:10.4049/jimmunol.1001906 (英语). 
  11. ^ 11.0 11.1 Graham, Rona K.; Ehrnhoefer, Dagmar E.; Hayden, Michael R. Caspase-6 and neurodegeneration. Trends in Neurosciences. 2011-12-01, 34 (12): 646–656 [2024-02-02]. ISSN 0166-2236. PMID 22018804. S2CID 1603684. doi:10.1016/j.tins.2011.09.001. (原始内容存档于2013-10-16) (英语). 
  12. ^ Wang XJ, Cao Q, Liu X, Wang KT, Mi W, Zhang Y, Li LF, LeBlanc AC, Su XD. Crystal structures of human caspase 6 reveal a new mechanism for intramolecular cleavage self-activation. EMBO Rep. Nov 2010, 11 (11): 841–7. PMC 2966951 . PMID 20890311. doi:10.1038/embor.2010.141. 
  13. ^ Entrez Gene: CASP6 caspase 6, apoptosis-related cysteine peptidase. 
  14. ^ Cowling V, Downward J. Caspase-6 is the direct activator of caspase-8 in the cytochrome c-induced apoptosis pathway: absolute requirement for removal of caspase-6 prodomain. Cell Death Differ. Oct 2002, 9 (10): 1046–56. PMID 12232792. doi:10.1038/sj.cdd.4401065 . 
  15. ^ Guo Y, Srinivasula SM, Druilhe A, Fernandes-Alnemri T, Alnemri ES. Caspase-2 induces apoptosis by releasing proapoptotic proteins from mitochondria. J. Biol. Chem. Apr 2002, 277 (16): 13430–7. PMID 11832478. doi:10.1074/jbc.M108029200 . 
  16. ^ Srinivasula SM, Ahmad M, Fernandes-Alnemri T, Litwack G, Alnemri ES. Molecular ordering of the Fas-apoptotic pathway: The Fas/APO-1 protease Mch5 is a CrmA-inhibitable protease that activates multiple Ced-3/ICE-like cysteine proteases. Proc. Natl. Acad. Sci. U.S.A. Dec 1996, 93 (25): 14486–91. Bibcode:1996PNAS...9314486S. PMC 26159 . PMID 8962078. doi:10.1073/pnas.93.25.14486 . 

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