메뉴 건너뛰기




Volumn 275, Issue 5305, 1997, Pages 1475-1478

PTG, a protein phosphate 1-binding protein with a role in glycogen metabolism

Author keywords

[No Author keywords available]

Indexed keywords

BINDING PROTEIN; GLYCOGEN; INSULIN RECEPTOR; PHOSPHOPROTEIN PHOSPHATASE; CARRIER PROTEIN; COMPLEMENTARY DNA; GLYCOGEN PHOSPHORYLASE; GLYCOGEN SYNTHASE; HYBRID PROTEIN; INSULIN; PHOSPHORYLASE KINASE; PPP1R3C PROTEIN, MOUSE; SIGNAL PEPTIDE;

EID: 0030614364     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.275.5305.1475     Document Type: Article
Times cited : (251)

References (36)
  • 5
    • 0028938152 scopus 로고
    • M. J. Hubbard and P. Cohen, Trends Biochem. Sci. 18, 172 (1993); D. Mochly-Rosen, Science 268, 247 (1995).
    • (1995) Science , vol.268 , pp. 247
    • Mochly-Rosen, D.1
  • 9
    • 0027400484 scopus 로고
    • A. Donella-Deana, A. Lavoinne, O. Marin, L. A. Pinna, P. Cohen, Biochem. Biophys. Acta 1178, 189 (1993); C. Sutherland, D. G. Campbell, P. Cohen, Eur. J. Biochem. 212, 581 (1993); P. Dent et al., Nature 348, 302 (1990).
    • (1993) Eur. J. Biochem. , vol.212 , pp. 581
    • Sutherland, C.1    Campbell, D.G.2    Cohen, P.3
  • 10
    • 0025522071 scopus 로고
    • A. Donella-Deana, A. Lavoinne, O. Marin, L. A. Pinna, P. Cohen, Biochem. Biophys. Acta 1178, 189 (1993); C. Sutherland, D. G. Campbell, P. Cohen, Eur. J. Biochem. 212, 581 (1993); P. Dent et al., Nature 348, 302 (1990).
    • (1990) Nature , vol.348 , pp. 302
    • Dent, P.1
  • 11
    • 0028813922 scopus 로고
    • R. J. Wiese et al., J. Biol. Chem. 270, 3442 (1995); T. Lin and J. C. Lawrence Jr., ibid. 269, 21255 (1994); L. J. Robinson, Z. F. Razzack, J. C. Lawrence, D. E. James, ibid. 268, 26422 (1993).
    • (1995) J. Biol. Chem. , vol.270 , pp. 3442
    • Wiese, R.J.1
  • 12
    • 0027935491 scopus 로고
    • R. J. Wiese et al., J. Biol. Chem. 270, 3442 (1995); T. Lin and J. C. Lawrence Jr., ibid. 269, 21255 (1994); L. J. Robinson, Z. F. Razzack, J. C. Lawrence, D. E. James, ibid. 268, 26422 (1993).
    • (1994) J. Biol. Chem. , vol.269 , pp. 21255
    • Lin, T.1    Lawrence Jr., J.C.2
  • 15
    • 1842275608 scopus 로고    scopus 로고
    • note
    • +) mRNA (5 μg) was used to synthesize cDNA with the Stratagene cDNA synthesis kit. cDNA fragments were then ligated unidirectionally into Eco RI-Xho I-digested pGAD-GH GAL4 activation domain plasmid (Clontech, Palo Alto, CA).
  • 16
    • 1842319662 scopus 로고    scopus 로고
    • note
    • + prototrophic colonies were recovered, of which 27 were β-Gal-positive.
  • 19
    • 1842277527 scopus 로고    scopus 로고
    • J. A. Printen, M. J. Brady, A. R. Saltiel, data not shown
    • J. A. Printen, M. J. Brady, A. R. Saltiel, data not shown.
  • 21
    • 0018276872 scopus 로고
    • B. C. Reed, S. H. Kaufmann, J. C. Mackall, A. K. Student, M. D. Lane, Proc. Natl. Acad. Sci. U.S.A. 74, 4876 (1977); C. S. Rubin, A. Hirsch, C. Fung, O. M. Rosen, J. Biol. Chem. 253, 7570 (1978); A. G. de Herreros and M. J. Birnbaum, ibid. 264, 19994 (1989).
    • (1978) J. Biol. Chem. , vol.253 , pp. 7570
    • Rubin, C.S.1    Hirsch, A.2    Fung, C.3    Rosen, O.M.4
  • 22
    • 0024367936 scopus 로고
    • B. C. Reed, S. H. Kaufmann, J. C. Mackall, A. K. Student, M. D. Lane, Proc. Natl. Acad. Sci. U.S.A. 74, 4876 (1977); C. S. Rubin, A. Hirsch, C. Fung, O. M. Rosen, J. Biol. Chem. 253, 7570 (1978); A. G. de Herreros and M. J. Birnbaum, ibid. 264, 19994 (1989).
    • (1989) J. Biol. Chem. , vol.264 , pp. 19994
    • De Herreros, A.G.1    Birnbaum, M.J.2
  • 23
    • 1842266795 scopus 로고    scopus 로고
    • note
    • 2-DYKDDDDK-COOH) was introduced into pCl-neo (Promega, Madison, WI) by ligating complementary oligonudeotides into Nhe I-Eco RI-digested vector. A 1.0-kb Eco RI fragment from clone B1-1 was cloned in-frame at the Eco RI site of the resulting plasmid, producing plasmid pF-PTG. The FLAG-PTG fusion is expressed from the strong cytomegalovirus (CMV) enhancer-promoter.
  • 25
    • 1842307292 scopus 로고    scopus 로고
    • note
    • CHO-IR cells transfected with pFPTG were sonicated in PP1 homogenization buffer (9) and centrifuged at 14000g for 10 min at 4°C to remove nuclei and cell debris. FLAG-PTG was immunoprecipitated from the supernatant by incubation with 10 μg of anti-FLAG (Kodak, New Haven, CT) for 1 hour at 4°C. Immune complexes were precipitated by incubation with protein A/G-agarose for 1 hour at 4°C and washed four times with homogenization buffer before the addition of SDS-sample buffer. Immunoprecipitates and subcellular fractions were separated on SDS-polyacrylamide gels, transferred to nitrocellulose, and probed with either FLAG monoclonal antibody or with affinity-purified polyclonal antibody to PP1.
  • 26
    • 1842402127 scopus 로고    scopus 로고
    • note
    • CHO-IR cells were washed three times with ice-cold phosphate-buffered saline, scraped in homogenization buffer, and samples sonicated and centrifuged at 2500g to remove nuclei and unlysed cells. The postnuclear supernatant was removed and centrifuged for 15 min at 10,000g and 1 hour at 100,00Og to pellet plasma membranes and glycogen pellets, respectively. The final supernatant was called cytosol.
  • 27
    • 1842278476 scopus 로고    scopus 로고
    • note
    • A 1.0-kb Eco R1 fragment from clone B1-1, encoding residues 8 to 293 of PTG, was subcloned into the Eco R1 site of pGEX-5X-3 expression vector. The GST-PTG fusion protein was expressed in Escherichia coli BL21(DE3)LysS and purified by affinity chromatography on glutathione-Sepharose beads.
  • 28
    • 1842317775 scopus 로고    scopus 로고
    • note
    • 2+. At the end of the incubation period SDS-sample buffer was added, proteins were separated by SOS-PAGE, and radiolabeled phosphorylase a was visualized by autoradiography and quantitated by scintillation counting.
  • 30
    • 1842343685 scopus 로고    scopus 로고
    • note
    • Glycogen synthase, phosphorylase kinase, and PKA assays: 3T3-L1 adipocytes were lysed in 1 ml of homogenization buffer and incubated with 25 μg of fusion protein immobilized on glutathione-Sepharose beads for 1 hour at 4°C. The beads were washed four times with homogenization buffer and assayed for bound glycogen synthase in the presence of glucose-6-phosphate (9). Phosphorylase kinase activity was determined as above (21). PKA activity was determined with bacterially expressed NH2-terminal portion of RG1 (5 μg) in the presence and absence of 0.1 mM dibutyryl-cyclic AMP (dbcAMP). PP1 and PP2A: 3T3-L1 adipocytes were lysed in 1 ml of homogenization buffer and incubated as above with fusion protein. After extensive washing, the beads were assayed for phosphatase activity in the presence of 0, 3, and 500 nM okadaic acid. Activity loss between 0 and 3 nM is attributed to PP2A activity; loss between 3 and 500 nM is due to PP1 activity (2). Okadaic acid (500 nM) completely inhibited all phosphatase activity on the beads or in the starting extract.
  • 34
    • 0028170809 scopus 로고
    • S. Shenolikar and A. C. Nairn, Adv. Second Messenger Phosphoprotein Res. 23, 1 (1991); S. Shenolikar, Annu. Rev. Cell Biol. 10, 55 (1994).
    • (1994) Annu. Rev. Cell Biol. , vol.10 , pp. 55
    • Shenolikar, S.1
  • 36
    • 1842281423 scopus 로고    scopus 로고
    • We thank M. Chang for the pCl-neo/FLAG construct, A. Nairn for PP1α cDNA, and J. Lawrence for antibodies to PP1Cα and glycogen synthase
    • We thank M. Chang for the pCl-neo/FLAG construct, A. Nairn for PP1α cDNA, and J. Lawrence for antibodies to PP1Cα and glycogen synthase.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.