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Volumn 275, Issue 5296, 1997, Pages 86-88

Interaction of the thiol-dependent reductase ERp57 with nascent glycoproteins

Author keywords

[No Author keywords available]

Indexed keywords

ASPARAGINE LINKED OLIGOSACCHARIDE; CALNEXIN; CALRETICULIN; CHAPERONE; GLYCOPROTEIN; OXIDOREDUCTASE; PROTEIN DISULFIDE ISOMERASE;

EID: 0031035644     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.275.5296.86     Document Type: Article
Times cited : (352)

References (32)
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    • note
    • 2-terminus.
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    • note
    • Antisera recognizing ERp57, the heavy chainbinding protein (BiP), and a 55-kD ER calciumbinding protein (ERG-55) were tested. Of these, only ERp57 was found to be cross-linked to PL62.CHO and no cross-linking products with PL62.Con were detected.
  • 16
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    • ERp57 is also known as GRP58, ERp61, ER-60, Q-2, and HIP-70 [C. F. Bennett, J. M. Balcarek, A. Varrichio, S. T. Crooke, Nature 334, 268 (1988); S. P. Srivastava, N. Chen, Y. Liu, J. L. Holtzman, J. Biol. Chem. 266,20337 (1991); N. Hirano et al., Biochem. Biophys. Res. Commun. 204, 375 (1994)].
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    • ERp57 is also known as GRP58, ERp61, ER-60, Q-2, and HIP-70 [C. F. Bennett, J. M. Balcarek, A. Varrichio, S. T. Crooke, Nature 334, 268 (1988); S. P. Srivastava, N. Chen, Y. Liu, J. L. Holtzman, J. Biol. Chem. 266,20337 (1991); N. Hirano et al., Biochem. Biophys. Res. Commun. 204, 375 (1994)].
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    • ERp57 is also known as GRP58, ERp61, ER-60, Q-2, and HIP-70 [C. F. Bennett, J. M. Balcarek, A. Varrichio, S. T. Crooke, Nature 334, 268 (1988); S. P. Srivastava, N. Chen, Y. Liu, J. L. Holtzman, J. Biol. Chem. 266,20337 (1991); N. Hirano et al., Biochem. Biophys. Res. Commun. 204, 375 (1994)].
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    • note
    • 2-terminal amino acid sequencing. The purified protein was then used to raise a rabbit polyclonal antibody. The resulting anti-ERp57 only functions for immunoprecipitation after SDS denaturation (Fig. 1B); thus, a reciprocal coimmunoprecipitation experiment (Fig. 2B) using anti-ERp57 in the first round was not possible.
  • 24
    • 0025358621 scopus 로고
    • After import of S. cerevisiae prepro-α factor cDNA (in pGEM) into microsomes, the resulting protein has three sites for N-linked glycosylation and nine lysine residues from which cross-linking may occur. Human IFN-γ has two sites for N-linked glycosylation, one cysteine residue, and 20 lysine residues. The transcription vector used was as described [N. J. Bulleid, E. Curling, R,B. Freedman, N. Jenkins, Biochem. J. 268, 777 (1990)].
    • (1990) Biochem. J. , vol.268 , pp. 777
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    • 14444284179 scopus 로고    scopus 로고
    • note
    • When the addition of SMCC to isolated microsomes was delayed for increasing lengths of time (19), the efficiency of cross-linking between PL62.CHO and ER components decreased. No loss of nascent PL62.CHO was observed over the same period. The estimated half-life for the PL62.CHO cross-linking products was 60 min for adducts with calnexin, calreticulin, and associated ERp57, and > 120 min for the adduct with PDI.
  • 29
    • 14444268130 scopus 로고    scopus 로고
    • note
    • 2, and 50 mM Hepes-KOH (pH 7.9)], which permits the oxidation of full-length prolactin, and the samples were treated with puromycin for 5 min. SMCC was added to a final concentration of 1 mM from a 50 mM stock in DMSO; samples were incubated for 10 min and then quenched by addition of 0.1 volumes of 50 mM 2-mercaptoethanol and 500 mM glycine. All reactions were carried out at the translation temperature of 26°C.
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    • (1988) Antibodies: A Laboratory Manual
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    • note
    • All of the glycosylated forms indicated in Fig. 3D were sensitive to digestion with endoglycosidase H. After import, signal sequence cleavage, and glycosylation, the major forms of PPα and IFN-γ had apparent molecular masses of 29 and 25 kD, respectively.
  • 32
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    • note
    • Supported by grants from the UK Biotechnology and Biological Sciences Research Council (BBSRC), the Human Frontier Science Program Organization (HFSPO), and the UK Medical Research Council. S.H. is a BBSRC Advanced Research Fellow. N.J.B. is a Royal Society Research Fellow. We thank C. Iwahashi for assistance with construct preparation, A. Helenius and members of his laboratory for advice and reagents, C. Stirling for S. cerevisiae prepro-α factor cDNA, J. L. Holtzman for anti-ERp57 (Q-2) serum, and several other groups that provided antisera to ER proteins.


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