5ed9

Structural highlights

Function

SUN2_MOUSE Component of SUN-protein-containing multivariate complexes also called LINC complexes which link the nucleoskeleton and cytoskeleton by providing versatile outer nuclear membrane attachment sites for cytoskeletal filaments. Specifically, Syne2 and Sun2 assemble in arrays of transmembrane actin-associated nuclear (TAN) lines which are bound to F-actin cables and couple the nucleus to retrograde actin flow during actin-dependent nuclear movement. Required for interkinetic nuclear migration (INM) and essential for nucleokinesis and centrosome-nucleus coupling during radial neuronal migration in the cerebral cortex and during glial migration. Anchors chromosome movement in the prophase of meiosis and is involved in selective gene expression of coding and non-coding RNAs needed for gametogenesis. Required for telomere attachment to nuclear envelope and gametogenesis. May also function on endocytic vesicles as a receptor for Rab5-GDP and participate in the activation of Rab5.^{[1] [2] [3] [4] [5]}

References

1. ↑ Crisp M, Liu Q, Roux K, Rattner JB, Shanahan C, Burke B, Stahl PD, Hodzic D. Coupling of the nucleus and cytoplasm: role of the LINC complex. J Cell Biol. 2006 Jan 2;172(1):41-53. Epub 2005 Dec 27. PMID:16380439 doi:http://dx.doi.org/10.1083/jcb.200509124
2. ↑ Lei K, Zhang X, Ding X, Guo X, Chen M, Zhu B, Xu T, Zhuang Y, Xu R, Han M. SUN1 and SUN2 play critical but partially redundant roles in anchoring nuclei in skeletal muscle cells in mice. Proc Natl Acad Sci U S A. 2009 Jun 23;106(25):10207-12. doi:, 10.1073/pnas.0812037106. Epub 2009 Jun 9. PMID:19509342 doi:http://dx.doi.org/10.1073/pnas.0812037106
3. ↑ Ostlund C, Folker ES, Choi JC, Gomes ER, Gundersen GG, Worman HJ. Dynamics and molecular interactions of linker of nucleoskeleton and cytoskeleton (LINC) complex proteins. J Cell Sci. 2009 Nov 15;122(Pt 22):4099-108. doi: 10.1242/jcs.057075. Epub 2009, Oct 20. PMID:19843581 doi:http://dx.doi.org/10.1242/jcs.057075
4. ↑ Zhang X, Lei K, Yuan X, Wu X, Zhuang Y, Xu T, Xu R, Han M. SUN1/2 and Syne/Nesprin-1/2 complexes connect centrosome to the nucleus during neurogenesis and neuronal migration in mice. Neuron. 2009 Oct 29;64(2):173-87. doi: 10.1016/j.neuron.2009.08.018. PMID:19874786 doi:http://dx.doi.org/10.1016/j.neuron.2009.08.018
5. ↑ Luxton GW, Gomes ER, Folker ES, Vintinner E, Gundersen GG. Linear arrays of nuclear envelope proteins harness retrograde actin flow for nuclear movement. Science. 2010 Aug 20;329(5994):956-9. doi: 10.1126/science.1189072. PMID:20724637 doi:http://dx.doi.org/10.1126/science.1189072