9g2u

Structural highlights

Function

SHLB1_HUMAN May be required for normal outer mitochondrial membrane dynamics (PubMed:15452144). Required for coatomer-mediated retrograde transport in certain cells (By similarity). May recruit other proteins to membranes with high curvature. May promote membrane fusion (PubMed:11604418). Involved in activation of caspase-dependent apoptosis by promoting BAX/BAK1 activation (PubMed:16227588). Isoform 1 acts proapoptotic in fibroblasts (By similarity). Involved in caspase-independent apoptosis during nutrition starvation and involved in the regulation of autophagy. Activates lipid kinase activity of PIK3C3 during autophagy probably by associating with the PI3K complex II (PI3KC3-C2) (PubMed:17891140). Associated with PI3KC3-C2 during autophagy may regulate the trafficking of ATG9A from the Golgi complex to the peripheral cytoplasm for the formation of autophagosomes by inducing Golgi membrane tubulation and fragmentation (PubMed:21068542). Involved in regulation of degradative endocytic trafficking and cytokinesis, probably in the context of PI3KC3-C2 (PubMed:20643123). Isoform 2 acts antiapoptotic in neuronal cells; involved in maintenance of mitochondrial morphology and promotes neuronal viability (By similarity).[UniProtKB:Q9JK48]^{[1] [2] [3] [4] [5]}

References

1. ↑ Farsad K, Ringstad N, Takei K, Floyd SR, Rose K, De Camilli P. Generation of high curvature membranes mediated by direct endophilin bilayer interactions. J Cell Biol. 2001 Oct 15;155(2):193-200. Epub 2001 Oct 15. PMID:11604418 doi:10.1083/jcb.200107075
2. ↑ Karbowski M, Jeong SY, Youle RJ. Endophilin B1 is required for the maintenance of mitochondrial morphology. J Cell Biol. 2004 Sep 27;166(7):1027-39. doi: 10.1083/jcb.200407046. PMID:15452144 doi:http://dx.doi.org/10.1083/jcb.200407046
3. ↑ Takahashi Y, Coppola D, Matsushita N, Cualing HD, Sun M, Sato Y, Liang C, Jung JU, Cheng JQ, Mule JJ, Pledger WJ, Wang HG. Bif-1 interacts with Beclin 1 through UVRAG and regulates autophagy and tumorigenesis. Nat Cell Biol. 2007 Oct;9(10):1142-51. doi: 10.1038/ncb1634. Epub 2007 Sep 23. PMID:17891140 doi:http://dx.doi.org/10.1038/ncb1634
4. ↑ Thoresen SB, Pedersen NM, Liestol K, Stenmark H. A phosphatidylinositol 3-kinase class III sub-complex containing VPS15, VPS34, Beclin 1, UVRAG and BIF-1 regulates cytokinesis and degradative endocytic traffic. Exp Cell Res. 2010 Dec 10;316(20):3368-78. doi: 10.1016/j.yexcr.2010.07.008. Epub, 2010 Jul 17. PMID:20643123 doi:http://dx.doi.org/10.1016/j.yexcr.2010.07.008
5. ↑ Takahashi Y, Meyerkord CL, Hori T, Runkle K, Fox TE, Kester M, Loughran TP, Wang HG. Bif-1 regulates Atg9 trafficking by mediating the fission of Golgi membranes during autophagy. Autophagy. 2011 Jan;7(1):61-73. doi: 10.4161/auto.7.1.14015. Epub 2011 Jan 1. PMID:21068542 doi:http://dx.doi.org/10.4161/auto.7.1.14015