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James H Catterson, Margarete M S Heck, Paul S Hartley
The vertebrate Kindlins are an evolutionarily conserved family of proteins critical for integrin signalling and cell adhesion. Kindlin-2 (KIND2) is associated with intercalated discs in mice, suggesting a role in cardiac syncytium development; however, deficiency of Kind2 leads to embryonic lethality. Morpholino knock-down of Kind2 in zebrafish has a pleiotropic effect on development that includes the heart. It therefore remains unclear whether cardiomyocyte Kind2 expression is required for cardiomyocyte junction formation and the development of normal cardiac function...
2013: PloS One
Jinhong Huang, Asako Furuya, Kanehiro Hayashi, Teiichi Furuichi
The kinase noncatalytic C-lobe domain (KIND) is a putative protein-protein interaction module. Four KIND-containing proteins, Spir-2 (actin-nuclear factor), PTPN13 (protein tyrosine phosphatase), FRMPD2 (scaffold protein) and very-KIND (v-KIND) (brain-specific Ras guanine nucleotide exchange factor), have been identified to date. Uniquely, v-KIND has two KINDs (i.e. KIND1 and KIND2), whereas the other three proteins have only one. The functional role of KIND, however, remains unclear. We previously demonstrated that v-KIND interacts with the high-molecular weight microtubule-associated protein 2 (MAP2), a dendritic microtubule-associated protein, leading to negative regulation of neuronal dendrite growth...
May 2011: FEBS Journal
J E Lai-Cheong, M Parsons, J A McGrath
The kindlins represent a class of focal adhesion proteins implicated in integrin activation. They comprise three evolutionarily conserved members, kindlin-1, kindlin-2 and kindlin-3, that share considerable sequence and structural similarities. The kindlins have a bipartite FERM (four point one protein, ezrin, radixin, moesin) domain interrupted by a pleckstrin homology domain and can bind directly to various classes of integrins as well as participate in inside-out integrin activation. They are encoded by three different genes, namely KIND1 (FERMT1; chromosome 20p12...
May 2010: International Journal of Biochemistry & Cell Biology
J E Lai-Cheong, S Ussar, K Arita, I R Hart, J A McGrath
Kindler syndrome (KS) results from pathogenic loss-of-function mutations in the KIND1 gene, which encodes kindlin-1, a focal adhesion and actin cytoskeleton-related protein. How and why abnormalities in kindlin-1 disrupt keratinocyte cell biology in KS, however, is not yet known. In this study, we identified two previously unreported binding proteins of kindlin-1: kindlin-2 and migfilin. Co-immunoprecipitation and confocal microscopy studies show that these three proteins bind to each other and colocalize at focal adhesion in HaCaT cells and normal human keratinocytes...
September 2008: Journal of Investigative Dermatology
Jinhong Huang, Asako Furuya, Teiichi Furuichi
The regulation of cytoskeletal components in the dendritic shaft core is critical for dendrite elongation and branching. Here, we report that a brain-specific Ras guanine nucleotide exchange factor (RasGEF) carrying two kinase non-catalytic C-lobe domains (KINDs), very-KIND (v-KIND), regulates microtubule-associated protein 2 (MAP2). v-KIND is expressed in developing mouse brain, predominantly in the cerebellar granule cells. v-KIND not only activates Ras small GTPases via the C-terminal RasGEF domain, but also specifically binds to MAP2 via the second KIND domain (KIND2), leading to threonine phosphorylation of MAP2...
November 5, 2007: Journal of Cell Biology
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