The Golgin GMAP210/TRIP11 anchors IFT20 to the Golgi complex.

Publisher: Public Library of Science Country of Publication: United States NLM ID: 101239074 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1553-7404 (Electronic) Linking ISSN: 15537390 NLM ISO Abbreviation: PLoS Genet Subsets: MEDLINE

Original Publication: San Francisco, CA : Public Library of Science, c2005-

Carrier Proteins/*metabolism ; Golgi Apparatus/*metabolism ; Nuclear Proteins/*metabolism; Animals ; Binding Sites ; Carrier Proteins/chemistry ; Carrier Proteins/genetics ; Cell Line ; Cells, Cultured ; Cilia/metabolism ; Cytoskeletal Proteins ; Golgi Apparatus/chemistry ; Golgi Apparatus/genetics ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Transgenic ; Nuclear Proteins/chemistry ; Nuclear Proteins/genetics ; Protein Binding ; Protein Transport

Eukaryotic cells often use proteins localized to the ciliary membrane to monitor the extracellular environment. The mechanism by which proteins are sorted, specifically to this subdomain of the plasma membrane, is almost completely unknown. Previously, we showed that the IFT20 subunit of the intraflagellar transport particle is localized to the Golgi complex, in addition to the cilium and centrosome, and hypothesized that the Golgi pool of IFT20 plays a role in sorting proteins to the ciliary membrane. Here, we show that IFT20 is anchored to the Golgi complex by the golgin protein GMAP210/Trip11. Mice lacking GMAP210 die at birth with a pleiotropic phenotype that includes growth restriction, ventricular septal defects of the heart, omphalocele, and lung hypoplasia. Cells lacking GMAP210 have normal Golgi structure, but IFT20 is no longer localized to this organelle. GMAP210 is not absolutely required for ciliary assembly, but cilia on GMAP210 mutant cells are shorter than normal and have reduced amounts of the membrane protein polycystin-2 localized to them. This work suggests that GMAP210 and IFT20 function together at the Golgi in the sorting or transport of proteins destined for the ciliary membrane.
Competing Interests: The authors have declared that no competing interests exist.

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GM060992 United States GM NIGMS NIH HHS; P30 DK032520 United States DK NIDDK NIH HHS; DK32520 United States DK NIDDK NIH HHS; Z01 HL005701 United States ImNIH Intramural NIH HHS; R01 GM060992 United States GM NIGMS NIH HHS

0 (Carrier Proteins)
0 (Cytoskeletal Proteins)
0 (Ift20 protein, mouse)
0 (Nuclear Proteins)
0 (TRIP11 protein, mouse)

Date Created: 20081230 Date Completed: 20090127 Latest Revision: 20221109

20250114

PMC2602600

10.1371/journal.pgen.1000315

19112494