Molecular Dynamics of Golgi Apparatus in Mammalian Cells

The Golgi apparatus in mammalian cells is a central hub for post-translational modification, sorting and trafficking of lipids and proteins. It comprises a series of flattened cisternae organised into a compact ribbon adjacent to the microtubule organising centre. Molecular dynamics within the Golgi involve the coordinated assembly and disassembly of cisternae, mediated by tethering factors, small GTPases and cytoskeletal motors. Vesicle budding and fusion cycles ensure directional trafficking of cargo from the cis- to the trans-Golgi network, while enzyme localisation within discrete cisternal domains governs sequential processing of glycoproteins and glycolipids. The ribbon architecture is maintained through protein complexes that bridge adjacent stacks, and its dynamic remodelling underpins responses to mitotic entry, secretory demand and cellular stress. Alterations in Golgi dynamics influence cell polarity, migration and signalling by regulating the spatial distribution of key regulators. Furthermore, the Golgi stress response activates programmes to restore organelle homeostasis under increased secretory load or damage. Disruption of these dynamics is implicated in pathologies from neurodegeneration to cancer, highlighting the importance of understanding mechanisms that govern Golgi structure and function.

Research from Nature Portfolio

Recent advances have revealed that the mammalian Golgi is organised into numerous small ‘Golgi units’, each containing dynamic domains of glycosylation enzymes that rapidly redistribute along the Golgi rim. High-resolution imaging combined with precise genome editing has shown that the mobility of glycosaminoglycan-synthesising enzymes between units depends on a tethering protein, giantin, establishing a direct link between the nanoscale architecture of the Golgi and its glycosylation capacity. In addition, a proteasome-mediated quality-control mechanism has been identified on the cytosolic face of Golgi membranes. Under conditions of Golgi stress, the targeted degradation of the stacking factor GM130 by p97/VCP and the 26S proteasome triggers Golgi dispersal. This degradative pathway provides a means to regulate organelle homeostasis and represents a potential vulnerability in secretory cells.

Molecular Dynamics of Golgi Apparatus in Mammalian Cells publication trend

The graph below shows the total number of articles in molecular dynamics of golgi apparatus in mammalian cells across all publications each year (not limited to Nature Index journals).

Technical terms

Cisterna: A flattened membrane disc within the Golgi stack that carries distinct processing enzymes.

Glycosylation: Enzymatic attachment of sugar moieties to proteins or lipids in the Golgi, critical for protein folding and function.

Golgi ribbon: The laterally connected network of Golgi stacks in mammalian cells that facilitates coordinated trafficking.

Vesicle trafficking: The process of budding, transport and fusion of membrane-bound vesicles carrying cargo between organelles.

Golgi stress response: A cellular programme activating transcriptional pathways to restore Golgi homeostasis under stress.

Proteasomal degradation: Targeted breakdown of proteins by the 26S proteasome, here regulating Golgi architecture via GM130 turnover.

References

1. Dynamic movement of the Golgi unit and its glycosylation enzyme zones. Nature Communications (2024).
2. Golgi dispersal in cancer stem cells promotes chemoresistance of colorectal cancer via the Golgi stress response. Cell Death & Disease (2024).
3. TFE3, HSP47, and CREB3 pathways of the mammalian Golgi stress response. Cell Structure and Function (2017).
4. GRASPs in Golgi Structure and Function. Frontiers in Cell and Developmental Biology (2016).
5. Golgi organization is regulated by proteasomal degradation. Nature Communications (2020).