ArticleMolecular biology of the cell2020
Flightless anchors IQGAP1 and R-ras to mediate cell extension formation and matrix remodeling.
Article in Molecular biology of the cell, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 18 citations in OpenAlex.
- Actin dynamics controlled by IqgC, a RasGAP at the crossroads between the IQGAP and fungal GAP1 families.FEBS open bio · 2026Review
- Integration of cAMP and TRPV4 Signaling to Optimize Collagen Remodeling for Management of Fibrosis.Cells · 2025Review
- The IQGAP-related RasGAP IqgC regulates cell-substratum adhesion in Dictyostelium discoideum.Cellular & molecular biology letters · 2025Article
- Article
- Coordination of actin plus-end dynamics by IQGAP1, formin, and capping protein.The Journal of cell biology · 2024Article
- Human dermal fibroblast-derived secretory proteins for regulating nerve restoration: A bioinformatic approach.Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2024Article
- IQGAP1 Regulates Actin Polymerization and Contributes to Bleomycin-Induced Lung Fibrosis.International journal of molecular sciences · 2024Article
- Coordination of actin plus-end dynamics by IQGAP1, formin, and capping protein.bioRxiv : the preprint server for biology · 2024Article
- Increased Expression of Flightless I in Cutaneous Squamous Cell Carcinoma Affects Wnt/β-Catenin Signaling Pathway.International journal of molecular sciences · 2021Article
- The Role of R-Ras Proteins in Normal and Pathologic Migration and Morphologic Change.The American journal of pathology · 2021Review
- High Endothelial Venules Accelerate Naive T Cell Recruitment by Tumor Necrosis Factor-Mediated R-Ras Upregulation.The American journal of pathology · 2021Article
- Increasing the level of cytoskeletal protein Flightless I reduces adhesion formation in a murine digital flexor tendon model.Journal of orthopaedic surgery and research · 2020Article
- Multifunctional Roles of the Actin-Binding Protein Flightless I in Inflammation, Cancer and Wound Healing.Frontiers in cell and developmental biology · 2020Review
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
Abstract
Tractional remodeling of collagen fibrils by fibroblasts requires long cell extensions that mediate fibril alignment. The formation of these cell extensions involves flightless I (FliI), an actin-binding protein that contains a leucine-rich-repeat (LRR), which binds R-ras and may regulate cdc42. We considered that FliI interacts with small GTPases and their regulators to mediate assembly of cell extensions. Mass spectrometry analyses of FliI immunoprecipitates showed abundant Ras GTPase-activating-like protein (IQGAP1), which in immunostained samples colocalized with FliI at cell adhesions. Knockdown of IQGAP1 reduced the numbers of cell extensions and the alignment of collagen fibrils. In experiments using dominant negative mutants, cdc42 activity was required for the formation of short extensions while R-ras was required for the formation of long extensions. Immunoprecipitation of wild-type and mutant constructs showed that IQGAP1 associated with cdc42 and R-ras; this association required the GAP-related domain (1004-1237 aa) of IQGAP1. In cells transfected with FliI mutants, the LRR of FliI, but not its gelsolin-like domains, mediated association with cdc42, R-ras, and IQGAP1. We conclude that FliI interacts with IQGAP1 and co-ordinates with cdc42 and R-ras to control the formation of cell extensions that enable collagen tractional remodeling.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.