» Articles » PMID: 25808494

Expression, Sorting, and Segregation of Golgi Proteins During Germ Cell Differentiation in the Testis

Abstract

The molecular basis of changes in structure, cellular location, and function of the Golgi apparatus during male germ cell differentiation is unknown. To deduce cognate Golgi proteins, we isolated germ cell Golgi fractions, and 1318 proteins were characterized, with 20 localized in situ. The most abundant protein, GL54D of unknown function, is characterized as a germ cell-specific Golgi-localized type II integral membrane glycoprotein. TM9SF3, also of unknown function, was revealed to be a universal Golgi marker for both somatic and germ cells. During acrosome formation, several Golgi proteins (GBF1, GPP34, GRASP55) localize to both the acrosome and Golgi, while GL54D, TM9SF3, and the Golgi trafficking protein TMED7/p27 are segregated from the acrosome. After acrosome formation, GL54D, TM9SF3, TMED4/p25, and TMED7/p27 continue to mark Golgi identity as it migrates away from the acrosome, while the others (GBF1, GPP34, GRASP55) remain in the acrosome and are progressively lost in later steps of differentiation. Cytoplasmic HSP70.2 and the endoplasmic reticulum luminal protein-folding enzyme PDILT are also Golgi recruited but only during acrosome formation. This resource identifies abundant Golgi proteins that are expressed differentially during mitosis, meiosis, and postacrosome Golgi migration, including the last step of differentiation.

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References
1.
Dahan S, Ahluwalia J, Wong L, Posner B, Bergeron J . Concentration of intracellular hepatic apolipoprotein E in Golgi apparatus saccular distensions and endosomes. J Cell Biol. 1994; 127(6 Pt 2):1859-69. PMC: 2120277. DOI: 10.1083/jcb.127.6.1859. View

2.
Clermont Y, RAMBOURG A, Hermo L . Trans-Golgi network (TGN) of different cell types: three-dimensional structural characteristics and variability. Anat Rec. 1995; 242(3):289-301. DOI: 10.1002/ar.1092420302. View

3.
Chayko C, ORGEBIN-CRIST M . Targeted disruption of the cation-dependent or cation-independent mannose 6-phosphate receptor does not decrease the content of acid glycosidases in the acrosome. J Androl. 2000; 21(6):944-53. View

4.
Nilsson T, Hoe M, Slusarewicz P, Rabouille C, Watson R, Hunte F . Kin recognition between medial Golgi enzymes in HeLa cells. EMBO J. 1994; 13(3):562-74. PMC: 394845. DOI: 10.1002/j.1460-2075.1994.tb06294.x. View

5.
Mamelak D, Lingwood C . The ATPase domain of hsp70 possesses a unique binding specificity for 3'-sulfogalactolipids. J Biol Chem. 2000; 276(1):449-56. DOI: 10.1074/jbc.M006732200. View