妊娠相關血漿蛋白A

妊娠相關血漿蛋白A(英語:pregnancy-associated plasma protein A,或Pappalysin-1,縮寫PAPP-A)是一種由人類基因 PAPPA 編碼的蛋白質,PAPP-A是一種分泌蛋白酶,其主要底物是胰島素樣生長因子結合蛋白。PAPP-A也用於唐氏綜合徵的篩查試驗。[5][6]

妊娠相關血漿蛋白A
識別號
別名PAPPA;, ASBABP2, DIPLA1, IGFBP-4ase, PAPA, PAPP-A, PAPPA1, pappalysin 1
外部IDOMIM176385 MGI97479 HomoloGene31097 GeneCardsPAPPA
基因位置(人類
9號染色體
染色體9號染色體[1]
9號染色體
妊娠相關血漿蛋白A的基因位置
妊娠相關血漿蛋白A的基因位置
基因座9q33.1起始116,153,791 bp[1]
終止116,402,321 bp[1]
RNA表達模式


查閱更多表達數據
直系同源
物種人類小鼠
Entrez
Ensembl
UniProt
mRNA​序列

​NM_002581

NM_021362

蛋白序列

NP_002572

NP_067337

基因位置​(UCSC)Chr 9: 116.15 – 116.4 MbChr 4: 65.04 – 65.28 Mb
PubMed​查找[3][4]
維基數據
檢視/編輯人類檢視/編輯小鼠

功能

基因編碼一種分泌的金屬蛋白酶,主要用於切割胰島素樣生長因子的結合蛋白(IGFBPs)。PAPP-A的蛋白水解活性在與膠原蛋白結合後被激活,參與許多局部增生過程,比如傷口癒合重塑。血漿中出現低水平的此蛋白被認為是妊娠中出現非整倍體胎兒(胎兒擁有不正常的染色體數)的生化標誌物[6],比如在唐氏綜合徵產前診斷中,低水平的PAPP-A是一個重要標誌[5]。低水平的PAPP-A也可表明胎盤存在問題,並導致不良併發症如宮內生長受限妊娠毒血症胎盤早期剝離早產乃至死產

相互作用

妊娠相關血漿蛋白A已知可與主要鹼性蛋白發生蛋白質交互作用[7][8][9]

參考文獻

  1. ^ 1.0 1.1 1.2 GRCh38: Ensembl release 89: ENSG00000182752 - Ensembl, May 2017
  2. ^ 2.0 2.1 2.2 GRCm38: Ensembl release 89: ENSMUSG00000028370 - 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. ^ 5.0 5.1 Breathnach FM, Malone FD. Screening for aneuploidy in first and second trimesters: is there an optimal paradigm?. Curr. Opin. Obstet. Gynecol. 2007, 19 (2): 176–82. PMID 17353686. doi:10.1097/GCO.0b013e3280895e00. 
  6. ^ 6.0 6.1 Entrez Gene: PAPPA pregnancy-associated plasma protein A, pappalysin 1. 
  7. ^ Overgaard MT, Haaning J, Boldt HB, Olsen IM, Laursen LS, Christiansen M, Gleich GJ, Sottrup-Jensen L, Conover CA, Oxvig C. Expression of recombinant human pregnancy-associated plasma protein-A and identification of the proform of eosinophil major basic protein as its physiological inhibitor. J. Biol. Chem. October 2000, 275 (40): 31128–33. PMID 10913121. doi:10.1074/jbc.M001384200. 
  8. ^ Overgaard MT, Sorensen ES, Stachowiak D, Boldt HB, Kristensen L, Sottrup-Jensen L, Oxvig C. Complex of pregnancy-associated plasma protein-A and the proform of eosinophil major basic protein. Disulfide structure and carbohydrate attachment. J. Biol. Chem. January 2003, 278 (4): 2106–17. PMID 12421832. doi:10.1074/jbc.M208777200. 
  9. ^ Oxvig C, Sand O, Kristensen T, Gleich GJ, Sottrup-Jensen L. Circulating human pregnancy-associated plasma protein-A is disulfide-bridged to the proform of eosinophil major basic protein. J. Biol. Chem. June 1993, 268 (17): 12243–6. PMID 7685339. 

延伸閱讀

外部連結

  • The MEROPS online database for peptidases and their inhibitors: M43.004