Kaspaza-7
Kaspaza-7, apoptozno vezana cisteinska peptidaza, znana i kao CASP7, jest protein koji je kod ljudi kodiran genom CASP7 sa hromosoma 10.
Ortolozi CASP7[5] identificirani su kod gotovo svih sisara za koje su dostupni potpuni podaci o genomu. Jedinstveni ortolozi su također prisutni u ptica, gušterova, Lissamphibia i Teleostea.
Aminokiselinska sekvenca
[uredi | uredi izvor]Dužina polipeptidnog lanca je 303 aminokiseline, a molekulska težina 34.277 Da.[5]
10 | 20 | 30 | 40 | 50 | ||||
---|---|---|---|---|---|---|---|---|
MADDQGCIEE | QGVEDSANED | SVDAKPDRSS | FVPSLFSKKK | KNVTMRSIKT | ||||
TRDRVPTYQY | NMNFEKLGKC | IIINNKNFDK | VTGMGVRNGT | DKDAEALFKC | ||||
FRSLGFDVIV | YNDCSCAKMQ | DLLKKASEED | HTNAACFACI | LLSHGEENVI | ||||
YGKDGVTPIK | DLTAHFRGDR | CKTLLEKPKL | FFIQACRGTE | LDDGIQADSG | ||||
PINDTDANPR | YKIPVEADFL | FAYSTVPGYY | SWRSPGRGSW | FVQALCSILE | ||||
EHGKDLEIMQ | ILTRVNDRVA | RHFESQSDDP | HFHEKKQIPC | VVSMLTKELY | ||||
FSQ |
Funkcija
[uredi | uredi izvor]Kaspaza-7 je član porodice proteina kaspaza (cistein [[asparaginska kiselinas|aspartat proteaza) i pokazalo se da je stražarski protein apoptoza. Sekvencijalna aktivacija kaspaza igra centralnu ulogu u fazi izvršenja ćelije apoptoza. Kaspaze postoje kao neaktivni proenzimi koji se podvrgavaju proteolitskoj obradi uzvodnim kaspazama (kapaza-8,9) na konzerviranim asparaginskim ostacima, kako bi se dobile dvije podjedinice, velika i mala, koje se dimeriziraju i formiraju aktivni enzim u obliku heterotetramer. Prekursor ove kaspaze cepaju kapazu-3, kapazu-10 i kapazu-9. Aktivira se na podražaje ćelijske smrti i inducira apoptozu. Alternativna prerada RNK rezultira u četiri varijante transkripta, kodirajući tri različite izoforme.[6]
Interakcije
[uredi | uredi izvor]Pokazalo se da kaspaza 7 u interakciji sa:
Također pogledajte
[uredi | uredi izvor]Reference
[uredi | uredi izvor]- ^ a b c GRCh38: Ensembl release 89: ENSG00000165806 - Ensembl, maj 2017
- ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000025076 - Ensembl, maj 2017
- ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ a b "OrthoMaM phylogenetic marker: CASP7 coding sequence". Arhivirano s originala, 4. 3. 2016. Pristupljeno 20. 12. 2009.
- ^ "Entrez Gene: CASP7 caspase 7, apoptosis-related cysteine peptidase".
- ^ Guo Y, Srinivasula SM, Druilhe A, Fernandes-Alnemri T, Alnemri ES (Apr 2002). "Caspase-2 induces apoptosis by releasing proapoptotic proteins from mitochondria". J. Biol. Chem. 277 (16): 13430–7. doi:10.1074/jbc.M108029200. PMID 11832478.
- ^ Srinivasula SM, Ahmad M, Fernandes-Alnemri T, Litwack G, Alnemri ES (Dec 1996). "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. 93 (25): 14486–91. Bibcode:1996PNAS...9314486S. doi:10.1073/pnas.93.25.14486. PMC 26159. PMID 8962078.
- ^ Tamm I, Wang Y, Sausville E, Scudiero DA, Vigna N, Oltersdorf T, Reed JC (Dec 1998). "IAP-family protein survivin inhibits caspase activity and apoptosis induced by Fas (CD95), Bax, caspases, and anticancer drugs". Cancer Res. 58 (23): 5315–20. PMID 9850056.
- ^ Shin S, Sung BJ, Cho YS, Kim HJ, Ha NC, Hwang JI, Chung CW, Jung YK, Oh BH (Jan 2001). "An anti-apoptotic protein human survivin is a direct inhibitor of caspase-3 and -7". Biochemistry. 40 (4): 1117–23. doi:10.1021/bi001603q. PMID 11170436.
- ^ Riedl SJ, Renatus M, Schwarzenbacher R, Zhou Q, Sun C, Fesik SW, Liddington RC, Salvesen GS (Mar 2001). "Structural basis for the inhibition of caspase-3 by XIAP". Cell. 104 (5): 791–800. doi:10.1016/S0092-8674(01)00274-4. PMID 11257232. S2CID 17915093.
- ^ Roy N, Deveraux QL, Takahashi R, Salvesen GS, Reed JC (Dec 1997). "The c-IAP-1 and c-IAP-2 proteins are direct inhibitors of specific caspases". EMBO J. 16 (23): 6914–25. doi:10.1093/emboj/16.23.6914. PMC 1170295. PMID 9384571.
- ^ Deveraux QL, Takahashi R, Salvesen GS, Reed JC (Jul 1997). "X-linked IAP is a direct inhibitor of cell-death proteases". Nature. 388 (6639): 300–4. Bibcode:1997Natur.388..300D. doi:10.1038/40901. PMID 9230442. S2CID 4395885.
- ^ Suzuki Y, Nakabayashi Y, Nakata K, Reed JC, Takahashi R (Jul 2001). "X-linked inhibitor of apoptosis protein (XIAP) inhibits caspase-3 and -7 in distinct modes". J. Biol. Chem. 276 (29): 27058–63. doi:10.1074/jbc.M102415200. PMID 11359776.
Dopunska literatura
[uredi | uredi izvor]- Cohen GM (1997). "Caspases: the executioners of apoptosis". Biochem. J. 326 (Pt 1): 1–16. doi:10.1042/bj3260001. PMC 1218630. PMID 9337844.
Vanjski linkovi
[uredi | uredi izvor]- The MEROPS online database for peptidases and their inhibitors: C14.004[mrtav link]
- P55210