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2018 ; 7
(ä): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
TANGO1 builds a machine for collagen export by recruiting and spatially
organizing COPII, tethers and membranes
#MMPMID29513218
Raote I
; Ortega-Bellido M
; Santos AJ
; Foresti O
; Zhang C
; Garcia-Parajo MF
; Campelo F
; Malhotra V
Elife
2018[Mar]; 7
(ä): ä PMID29513218
show ga
Collagen export from the endoplasmic reticulum (ER) requires TANGO1, COPII coats,
and retrograde fusion of ERGIC membranes. How do these components come together
to produce a transport carrier commensurate with the bulky cargo collagen? TANGO1
is known to form a ring that corrals COPII coats, and we show here how this ring
or fence is assembled. Our data reveal that a TANGO1 ring is organized by its
radial interaction with COPII, and lateral interactions with cTAGE5, TANGO1-short
or itself. Of particular interest is the finding that TANGO1 recruits ERGIC
membranes for collagen export via the NRZ (NBAS/RINT1/ZW10) tether complex.
Therefore, TANGO1 couples retrograde membrane flow to anterograde cargo
transport. Without the NRZ complex, the TANGO1 ring does not assemble, suggesting
its role in nucleating or stabilising this process. Thus, coordinated capture of
COPII coats, cTAGE5, TANGO1-short, and tethers by TANGO1 assembles a collagen
export machine at the ER.