Mannose 6-Phosphate Receptors Regulate the Formation of Clathrin-coated Vesicles in the TGN
Mannose 6-Phosphate Receptors Regulate the Formation of Clathrin-coated Vesicles in the TGN
复制标题
甘露糖 6-磷酸受体调节 TGN 中网格蛋白包被囊泡的形成
作者:
R. L. Borgne;B. Hoflack
The transport of the two mannose 6-phosphate receptors (MPRs) from the secretory pathway to the endocytic pathway is mediated by carrier vesicles coated with the AP-1 Golgi-specific assembly protein and clathrin. Using an in vitro assay that reconstitutes the ARF-1–dependent translocation of cytosolic AP-1 onto membranes of the TGN, we have previously reported that the MPRs are key components for the efficient recruitment of AP-1 (Le Borgne, R., G. Griffiths, and B. Hoflack. 1996. J. Biol. Chem. 271:2162–2170). Using a polyclonal antibody against the mouse γ-adaptin, we have now examined the steady state distribution of AP-1 after subcellular fractionation of mouse fibroblasts lacking both MPRs or reexpressing physiological levels of either MPR. We report that the amount of AP-1 bound to membranes and associated with clathrin-coated vesicles depends on the expression level of the MPRs and on the integrity of their cytoplasmic domains. Thus, these results indicate that the concentration of the MPRs, i.e., the major transmembrane proteins sorted toward the endosomes, determines the number of clathrin-coated vesicles formed in the TGN.
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影响因子:
11.4
作者:
JACKSON, MR;NILSSON, T;PETERSON, PA
通讯作者:
PETERSON, PA
DOI:
10.1016/s0021-9258(18)41533-5
发表时间:
1993-10
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
H. J. Chen;J. Remmler;J. Delaney;D. Messner;P. Lobel
通讯作者:
H. J. Chen;J. Remmler;J. Delaney;D. Messner;P. Lobel
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Johnson,KF;Kornfeld,S
通讯作者:
Kornfeld,S
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Balch,WE;Kahn,RA;Schwaninger,R
通讯作者:
Schwaninger,R