Anti-SUN1 antibody [EPR6554]

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.

Activity summary

SUN1 also known as Sad1-Unc-84 homology 1 is a protein with a molecular mass of approximately 97 kDa. This protein is an important component of the nuclear envelope which helps maintain the structure of the nucleus. It is expressed in various tissues including muscle and neurons and is an integral part of the linking complex that connects the nuclear envelope to the cytoskeleton. SUN1 functions as a structural protein and contributes to the mechanical stability of the nuclear architecture.

Biological function summary

SUN1 plays significant roles in cellular functions through its interaction with other proteins. It is an essential part of the LINC (Linker of Nucleoskeleton and Cytoskeleton) complex where it interacts with KASH domain-containing proteins that span the outer nuclear membrane. This interaction is important for nuclear positioning centrosome attachment and chromosomal movement. SUN1 participates in critical processes such as DNA repair and meiotic progression influencing cell cycle regulation and genetic stability.

Pathways

SUN1 integrates into cellular communication systems by mediating mechanical signals across the nuclear-cytoplasmic boundary. It is actively involved in the nuclear envelope-endoplasmic reticulum network which is critical for nuclear-cytoskeletal coupling. The protein associates with SUN2 another member of the SUN family and they both interact with the Nesprin proteins anchoring the nucleus to the cell's structural framework. This association enables SUN1 to influence signaling pathways related to cell division and differentiation.

Associated diseases and disorders

Mutations and malfunctions within the SUN1 protein have been associated with several medical conditions. Its role is particularly noted in certain muscular dystrophies and nuclear envelopathies where mutations disrupt nuclear-cytoskeletal connections. In these pathological states SUN1 has links with proteins like Emerin which also reside at the nuclear envelope and whose dysfunction causes Emery-Dreifuss muscular dystrophy. These interconnections highlight the importance of SUN1 in maintaining cellular integrity and function particularly in muscle and nerve cells.