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Mass spectrometry proteomics detecting interaction proteins of Kindlin-2

ABSTRACT: We aim to find out the Kindlin-2 interaction proteins. We transfected plasmids Flag or Flag-Kindlin-2 to HKC cell lines and then used Flag-M2 beads to do the coimmunoprecipitation experiments and followed by NuPAGE Tris-Acetate Mini Gels detection and stained by Coomassie brilliant blue. Compared the two groups,and then we will find the proteins interact with Kindlin-2.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Epithelial Cell, Cell Culture

DISEASE(S): Disease Free

SUBMITTER: Jiagui Song

LAB HEAD: Hongquan Zhang

PROVIDER: PXD016008 | Pride | 2019-12-16

REPOSITORIES: Pride

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			Action	DRS
	MS170526-CON.raw	Raw
	MS170526-CON.xlsx	Xlsx
	MS170526-EXP.raw	Raw
	MS170526-EXP.xlsx	Xlsx

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Publications

Kindlin-2 Inhibits the Hippo Signaling Pathway by Promoting Degradation of MOB1.

Song Jiagui J Wang Tianzhuo T Chi Xiaochun X Wei Xiaofan X Xu Sidi S Yu Miao M He Huiying H Ma Ji J Li Xueying X Du Juan J Sun Xiaoran X Wang Yunling Y Zhan Jun J Zhang Hongquan H

Cell reports 20191201 11

The Hippo signaling pathway plays a key role in development and cancer progression. However, molecules that intrinsically inhibit this pathway are less well known. Here, we report that the focal adhesion molecule Kindlin-2 inhibits Hippo signaling by interacting with and degrading MOB1 and promoting the interaction between MOB1 and the E3 ligase praja2. Kindlin-2 thus inhibits the phosphorylation of LATS1 and YAP and promotes YAP translocation into the nucleus, where it activates downstream Hipp ...[more]

PMID: 31825843

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Expression data of cDNA from the ACHN control and Kindlin-2-depleting cells

Project description:Kindlin-2, an integrin-interacting FERM-domain-containing protein, has been known to play critical roles for tumor progression. However, the role of Kindlin-2 in renal cell carcinoma (RCC) progression has not been reported. We aim to investigate the role of Kindlin-2 in the progression of RCC and the underlying mechanisms. To uncover the related pathway in which Kindlin-2 is involved to promote clear cell renal cell carcinoma progression, ACHN control and Kindlin-2-depleting cells were analyzed by Affymetrix GeneChip human Gene 1.0 ST Arrays. ACHN cells were transfected with control short hairpin RNA (shRNA) or Kindlin-2 shRNA. ACHN control and Kindlin-2-depleting cells cDNAs were hybridized to Affymetrix GeneChip Human Gene 1.0 ST arrays. Data were analyzed by Expression Console 1.4.1.

2015-12-16 | E-GEOD-76020 | biostudies-arrayexpress

Expression data of cDNA from the ACHN control and Kindlin-2-depleting cells

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Loss of Kindlin-1 drives a more aggressive phenotype in cutaneous squamous cell carcinoma

Project description:Kindler syndrome (KS) is a rare genodermatosis resulting from loss-of-function mutations in FERMT1, the gene that encodes Kindlin-1. KS patients have a high propensity to develop aggressive and metastatic cutaneous squamous cell carcinoma (SCC). In this study, we show that loss of Kindlin-1 in a mouse model of cutaneous SCC leads to increased migration, invasion and degradation of collagen. Loss of Kindlin-1 increased tumor growth in vivo and in 3D spheroids, which was associated with the development of a hypoxic tumor environment and increased glycolysis. One of the most highly upregulated genes in Kindlin-1-depleted tumors was Mmp13, and the increased expression of MMP13 was responsible for driving the increased migration and invasion of the Kindlin-1-depleted SCC cells. These results provide evidence that Kindlin-1 loss in SCC can promote migration and invasion through the upregulation of MMP13, and offer novel insights into how Kindlin-1 loss leads to the development of a hypoxic environment that is permissive for tumor growth.

2023-07-14 | GSE236883 | GEO

Virus infection triggers widespread silencing of host genes by a distinct class of endogenous siRNAs in Arabidopsis

Project description:Virus infection triggers widespread silencing of host genes by a distinct class of endogenous siRNAs in Arabidopsis This study constructed and sequenced two independent small RNA libraries from the upper uninoculated leaves of (i) WT Arabidopsis plants 14 d after mock inoculation and of (ii) rdr1 rdr6 plants 14 d after infection with Fny CMV-Δ2b, and one library each from the upper uninoculated leaves of (iii) WT, (iv) rdr1, and (v) rdr6 plants 14 d after infection with TuMV-GFP. Coimmunoprecipitation with FLAG- and HA-specific antibodies was used to obtain (vi,vii) AGO1 and (viii,ix) AGO2 complexes, respectively, from the FLAG-AGO1/ago1-36 and HA-AGO2 plants 14 d after infection with Fny CMV-Δ2b for extracting total loaded small RNAs for the construction and sequencing of small RNA libraries.

2014-08-30 | E-GEOD-60929 | biostudies-arrayexpress

Mechanism of Kindlin-2 regulating invasion and metastasis of human Hepatocellular carcinoma

Project description:To explore the mechanism of Kindlin-2 regulating invasion and metastasis of human Hepatocellular carcinoma, we performed gene expression microarray analysis on Kindlin-2 knockdown LM3 cells and the control cells to compare the gene expression levels between the two groups.

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Kindlin-2 modulates PTH1R to regulate bone mass and PTH actions in bone

Project description:To investigation the role of PTH and Kindlin-2 in bone development, we performed single-cell RNA-sequencing. From Con-veh, Con-PTH, cKO-veh, cKO-PTH, we profiled more than 20k single cells, including multi-potent mesenchymal stromal cells (MSC), osteoprogenitors, osteoblasts, chondrocytes, fibroblasts, endothelial cells, smooth muscle cells, skeletal muscle cells, pericytes, and schwann cells. We found proportion of part of these cells were significant altered by PTH or Kindlin-2 loss, especially for MSC, osteoblast, chondrocyte, and fibroblast. Transcriptomic analysis revealed gene expression was dramatically regulated by PTH or Kindlin-2 loss.

2020-10-01 | GSE150291 | GEO

Gene expression profile at single cell level of mammary gland from Kindlin-2 genetically modified mouse model

Project description:During gestation, alveolar cells are derived from luminal progenitors in the mammary gland. However, the mechanism underlying luminal progenitor commitment to alveolar cells remains largely unknown. By using five genetically modified mouse lines and single cell RNA sequencing, we identified a Kindlin-2 - Stat3 - Dll1 signaling cascade in myoepithelial cells which controls the inactivation of Notch signaling in luminal cells that consequently drives luminal progenitor commitment to alveolar cells. We found that loss of Kindlin-2 in myoepithelial cells impairs mammary morphogenesis and alveologenesis, and lactation. Single-cell profiling reveals that Kindlin-2 loss significantly decreases the proportion of alveolar cells.

2023-03-07 | GSE222028 | GEO

Low kindlin-3 levels in osteoclasts of kindlin-3 hypomorphic mice result in osteopetrosis due to leaky sealing zones

Project description:Osteoclasts form special integrin-mediated adhesion structures called sealing zones that enable them to adhere to and resorb bone. Sealing zones consist mainly of densely packed podosomes tightly inter-connected by actin fibers. Their formation requires the presence of the hematopoietic integrin regulator kindlin-3. In the current study, we investigated osteoclasts and their adhesion structures in kindlin-3 hypomorphic mice expressing only 5-10% of kindlin-3. Low kindlin-3 expression reduces integrin activity, results in impaired osteoclast adhesion and signaling, and delays cell spreading. Despite these defects, in vitro generated kindlin-3-hypomorphic osteoclasts arrange their podosomes into adhesion patches and belts, which show abnormal podosome and actin organization. Remarkably, kindlin-3-hypomorphic osteoclasts form sealing zones when cultured on calcified matrix in vitro and on bone surface in vivo. However, functional assays as well as immunohistochemical staining and electron micrographs of bone sections showed that they fail to properly seal the resorption lacunae, which is required for secreted proteases to be able to digest bone matrix. This results in mild osteopetrosis. Our study reveals a new, hitherto understudied function of kindlin-3 as an essential organizer of integrin-mediated adhesion structures, such as sealing zones.

2021-11-25 | PXD026711 | Pride

Mass spectrometry-based analysis of kindlin phosphorylation, ubiquitination and interactome

Project description:Kindlin is an essential activator of integrins and thus indispensable in cell to extracellular matrix (ECM) adhesion. Kindlin abundance and functions are tightly regulated by multiple mechanisms including post-translational modifications (PTMs). Despite the critical roles of kindlin during embryonic development and pathogenesis, the knowledge of kindlin’s PTMs and interactome is far from complete. Here we analyze the phosphorylation, ubiquitination and interacting partners of kindlin in flat, firmly adherent interphase cells and round, weakly attached mitotic cells by immunoprecipitation-based mass spectrometry (IP-MS). The analysis generated potential phosphorylation and ubiquitination sites as well as interactors of kindlin and paved the way to investigate PTMs and binding partners of kindlin.

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Structural basis of human full-length kindlin-3 homotrimer in an auto-inhibited state

Project description:Kindlin-1, -2, and -3, directly bind integrin β cytoplasmic tails to regulate integrin activation and signaling. Despite their functional significance and link to several diseases, structural information on full-length kindlin proteins remains unknown. Here, we report the crystal structure of human full-length kindlin-3, which reveals a novel homotrimer state. Unlike kindlin-3 monomer, which is the major population in insect and mammalian cell expression systems, kindlin-3 trimer does not bind integrin β cytoplasmic tail as the integrin-binding pocket in the F3 sub-domain of one protomer is occluded by the PH domain of another protomer, suggesting that kindlin-3 is auto-inhibited upon trimer formation. This is also supported by functional assays in which kindlin-3 knockout K562 erythroleukemia cells re-constituted with the mutant kindlin-3 containing trimer-disrupting mutations exhibited an increase in integrin-mediated adhesion and spreading on fibronectin compared to those re-constituted with wild type kindlin-3. Taken together, our findings reveal a novel mechanism of kindlin auto-inhibition that involves its homotrimer formation.

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