3ro3
From Proteopedia
crystal structure of LGN/mInscuteable complex
Structural highlights
Function[GPSM2_MOUSE] Plays an important role in spindle pole orientation (By similarity). Interacts and contributes to the functional activity of G(i) alpha proteins. Acts to stabilize the apical complex during neuroblast divisions. [INSC_MOUSE] May function as an adapter linking the Par3 complex to the GPSM1/GPSM2 complex. Involved in spindle orientation during mitosis it may regulate cell proliferation and differentiation in the developing nervous system. May play a role in the asymmetric division of fibroblasts and participate in the process of stratification of the squamous epithelium.[1] [2] Publication Abstract from PubMedAsymmetric cell division requires the establishment of cortical cell polarity and the orientation of the mitotic spindle along the axis of cell polarity. Evidence from invertebrates demonstrates that the Par3/Par6/aPKC and NuMA/LGN/Galphai complexes, which are thought to be physically linked by the adaptor protein mInscuteable (mInsc), play indispensable roles in this process. However, the molecular basis for the binding of LGN to NuMA and mInsc is poorly understood. The high-resolution structures of the LGN/NuMA and LGN/mInsc complexes presented here provide mechanistic insights into the distinct and highly specific interactions of the LGN TPRs with mInsc and NuMA. Structural comparisons, together with biochemical and cell biology studies, demonstrate that the interactions of NuMA and mInsc with LGN are mutually exclusive, with mInsc binding preferentially. Our results suggest that the Par3/mInsc/LGN and NuMA/LGN/Galphai complexes play sequential and partially overlapping roles in asymmetric cell division. LGN/mInsc and LGN/NuMA complex structures suggest distinct functions in asymmetric cell division for the Par3/mInsc/LGN and Galphai/LGN/NuMA pathways.,Zhu J, Wen W, Zheng Z, Shang Y, Wei Z, Xiao Z, Pan Z, Du Q, Wang W, Zhang M Mol Cell. 2011 Aug 5;43(3):418-31. PMID:21816348[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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Categories: Lk3 transgenic mice | Pan, Z | Shang, Y | Wang, W | Wei, Z | Wen, W | Zhang, M | Zhu, J | Asymmetric cell division | Protein binding
