ERGIC2
Protein 2 endoplazmatskoretikulumsko-Golgijevog intermedijarnog odjeljka (ERGIC2), znan i kao PTX1, CDA14 ili Erv41,[5] je gen koji se kod ljudi nalazi na hromosomu 12, sekvenca p11. Kodira protein od 377 aminokiselinskih ostataka.
Biološka funkcija proteina ERGIC2 nije poznata, iako je u početku identificiran kao potencijalni supresor tumora raka prostate,[6] i pokazalo se da izaziva zaustavljanje rasta ćelija i starenje, da suzbija stvaranje kolonija u mehkom agaru i da smanjuje invazivni potencijal ćelijske linije raka prostate kod ljudi (ćelije PC-3).[7] Sada se vjeruje da je to šaperonska molekula uključena u promet proteina između endoplazmatskog retikuluma-Golgijevog srednjeg odjeljka (ERGIC) i Golgijevog aparata. Protein sadrži dva hidrofobna transmembranska domena koji pomažu učvršćivanje molekula na membrani endoplazmatskog retikuluma (ER), tako da se njegov veliki lumenski domen orijentira unutar lumena ER, a i na N– i na C-kraju su okrenuti prema citosolu. ERGIC2 tvori kompleks s dva druga proteina, ERGIC3 i ERGIC32, što rezultira šatlom za promet proteina između ER i Golgijevog aparata.[8] Pokazalo se da stupa u interakciju s brojnim proteinima, kao što su beta-amiloid,[9] proteinski elongacijski faktor 1 alfa,[10] i otoferlin.[11] Stoga može imati važnu ulogu u ćelijskim funkcijama, osim što je sastavni dio šatla za promet proteina. Nedavno je prijavljen varijantni transkript ERGIC2.[12]
Ima deleciju četiri baze na spoju egzona 8 i 9, što rezultira mutacijom pomaka okvira nakon 189. kodona. Varijanta transkripta kodira krnji protein od 215 ostataka, koji gubi 45% lumenskog i transmembranskog domena, u blizini C-kraja. Time se učinkovito ukida njegova funkcija transportera proteina. Slična varijanta zabilježena je i kod armadila. Dakle, ovo nije slučajna mutacija. Funkcija ovog krnjeg proteina nije poznata.
Aminokiselinska sekvenca
[uredi | uredi izvor]Dužina polipeptidnog lanca je 377 aminokiselina, a molekulska težina 42.549 Da.[13]
10 | 20 | 30 | 40 | 50 | ||||
---|---|---|---|---|---|---|---|---|
MRRLNRKKTL | SLVKELDAFP | KVPESYVETS | ASGGTVSLIA | FTTMALLTIM | ||||
EFSVYQDTWM | KYEYEVDKDF | SSKLRINIDI | TVAMKCQYVG | ADVLDLAETM | ||||
VASADGLVYE | PTVFDLSPQQ | KEWQRMLQLI | QSRLQEEHSL | QDVIFKSAFK | ||||
STSTALPPRE | DDSSQSPNAC | RIHGHLYVNK | VAGNFHITVG | KAIPHPRGHA | ||||
HLAALVNHES | YNFSHRIDHL | SFGELVPAII | NPLDGTEKIA | IDHNQMFQYF | ||||
ITVVPTKLHT | YKISADTHQF | SVTERERIIN | HAAGSHGVSG | IFMKYDLSSL | ||||
MVTVTEEHMP | FWQFFVRLCG | IVGGIFSTTG | MLHGIGKFIV | EIICCRFRLG | ||||
SYKPVNSVPF | EDGHTDNHLP | LLENNTH |
- Simboli
C: Cistein
D: Asparaginska kiselina
E: Glutaminska kiselina
F: Fenilalanin
G: Glicin
H: Histidin
I: Izoleucin
K: Lizin
L: Leucin
M: Metionin
N: Asparagin
P: Prolin
Q: Glutamin
R: Arginin
S: Serin
T: Treonin
V: Valin
W: Triptofan
Y: Tirozin
Reference
[uredi | uredi izvor]- ^ a b c GRCh38: Ensembl release 89: ENSG00000087502 - Ensembl, maj 2017
- ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000030304 - 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.
- ^ "Entrez Gene: ERGIC2 ERGIC and golgi 2".
- ^ Kwok SC, Liu X, Daskal I (2001). "Molecular cloning, expression, localization, and gene organization of PTX1, a human nuclear protein that is downregulated in prostate cancer". DNA Cell Biol. 20 (6): 349–57. doi:10.1089/10445490152122460. PMID 11445006.
- ^ Liu X, Daskal I, Kwok SC (2003). "Effects of PTX1 expression on growth and tumorigenicity of the prostate cancer cell line PC-3". DNA Cell Biol. 22 (7): 469–74. doi:10.1089/104454903322247343. PMID 12932305.
- ^ Breuza L, Halbeisen R, Jenö P, et al. (2004). "Proteomics of endoplasmic reticulum-Golgi intermediate compartment (ERGIC) membranes from brefeldin A-treated HepG2 cells identifies ERGIC-32, a new cycling protein that interacts with human Erv46". J. Biol. Chem. 279 (45): 47242–53. doi:10.1074/jbc.M406644200. PMID 15308636.
- ^ Nelson TJ, Alkon DL (2007). "Protection against beta-amyloid-induced apoptosis by peptides interacting with beta-amyloid". J Biol Chem. 282 (43): 31238–49. doi:10.1074/jbc.M705558200. PMID 17761669.
- ^ Yang YF, Chou MY, Fan CY, Chen SF, Lyu PC, Liu CC, Tseng TL (2008). "The possible interaction of CDA14 and protein elongation factor 1alpha". Biochim Biophys Acta. 1784 (2): 312–8. doi:10.1016/j.bbapap.2007.10.006. PMID 17980171.
- ^ Zak M, Breß A, Brandt N, Franz C, Ruth P, Pfister M, Knipper M, Blin N (2012). "Ergic2, a brain specific interacting partner of otoferlin". Cell Physiol Biochem. 29 (5–6): 941–8. doi:10.1159/000188338. PMID 22613993.
- ^ Kwok SC, Kumar S, Dai G (2014). "Characterization of a variant ERGIC2 transcript". DNA Cell Biol. 33 (2): 73–78. doi:10.1089/dna.2013.2225. PMID 24303950.
- ^ "UniProt, Q96RQ1". Pristupljeno 9. 8. 2021.
Dopunska literatura
[uredi | uredi izvor]- Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
- Bonaldo MF, Lennon G, Soares MB (1997). "Normalization and subtraction: two approaches to facilitate gene discovery". Genome Res. 6 (9): 791–806. doi:10.1101/gr.6.9.791. PMID 8889548.
- Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
- Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
- Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
- Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
- Kwok SC, Liu X, Mangel P, Daskal I (2006). "PTX1(ERGIC2)-VP22 fusion protein upregulates interferon-beta in prostate cancer cell line PC-3". DNA Cell Biol. 25 (9): 523–9. doi:10.1089/dna.2006.25.523. PMID 16989575.