1
|
Hanna J, Ramani S, Williams T, Anaya R, Campion N, Lopez E, Williams R, McIntire J, Tran N, Reyna V, Zeng J, Miller S, Pancar A, Qiu Z, Lee M. Three alleles in the pat-3 locus of Caenorhabditis elegans: mutations in the membrane-distal NPxY phosphotyrosine motif. MICROPUBLICATION BIOLOGY 2020; 2020:10.17912/micropub.biology.000291. [PMID: 32821887 PMCID: PMC7431279 DOI: 10.17912/micropub.biology.000291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jacob Hanna
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Shiva Ramani
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Teja Williams
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Ryan Anaya
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Neil Campion
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Evan Lopez
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Raj Williams
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Joe McIntire
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Nicholas Tran
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Victoria Reyna
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Jingmei Zeng
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Shailyn Miller
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Amar Pancar
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Zhongqiang Qiu
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A
| | - Myeongwoo Lee
- Department of Biology, Baylor University, Waco, Texas 76798, U.S.A.,
Correspondence to: Myeongwoo Lee ()
| |
Collapse
|
2
|
Qiu Z, Sheesley P, Ahn JH, Yu EJ, Lee M. A Novel Mutation in an NPXY Motif of β Integrin Reveals Phenotypes Similar to him-4/hemicentin. Front Cell Dev Biol 2019; 7:247. [PMID: 31720287 PMCID: PMC6827421 DOI: 10.3389/fcell.2019.00247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 10/08/2019] [Indexed: 11/13/2022] Open
Abstract
Integrin, an αβ heterodimeric cell surface receptor for the extracellular matrix (ECM), carries two tyrosine phosphorylation motifs in the cytoplasmic tail of the β subunit. NPXY (Asn-Pro-x-Tyr) is a conserved tyrosine phosphorylation motif that binds to the phospho-tyrosine binding (PTB) domain. We generated a tyrosine to glutamic acid (E) mutation to modify tyrosine (Y) into a negatively charged amino NPXY in the βpat-3 integrin of Caenorhabditis elegans. The transgenic rescue animal displayed defects in gonad migration and tail morphology. Also, the mutant animals produced a high number of males, suggesting that the Y to E mutation in βpat-3 integrin causes a phenotype similar to that of Him mutant. Further analyses revealed that males of pat-3(Y804E) and him-4/hemicentin share additional phenotypes such as abnormal gonad and unsuccessful mating. A pat-3 transgenic rescue mutant with a non-polar phenylalanine (F) in NPXY, pat-3(Y792/804F), suppressed the high male number, defective mating, inviable zygote, and the abnormal gonad of him-4 mutants, indicating that Y to F mutation in both NPXY motifs suppressed the him-4 phenotypes. This finding supports the idea that the ECM determines the activation state in integrin NPXY motifs; him-4/hemicentin may directly or indirectly interact with integrins and maintain the NPXY non-charged. Our findings provide new insight into a suppressive role of an ECM molecule in integrin NPXY phosphorylation.
Collapse
Affiliation(s)
| | | | | | | | - Myeongwoo Lee
- Department of Biology, Baylor University, Waco, TX, United States
| |
Collapse
|
3
|
Kihira S, Yu EJ, Cunningham J, Cram EJ, Lee M. A novel mutation in β integrin reveals an integrin-mediated interaction between the extracellular matrix and cki-1/p27KIP1. PLoS One 2012; 7:e42425. [PMID: 22879977 PMCID: PMC3412830 DOI: 10.1371/journal.pone.0042425] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 07/09/2012] [Indexed: 01/20/2023] Open
Abstract
The cell-extracellular matrix (ECM) interaction plays an essential role in maintaining tissue shapes and regulates cell behaviors such as cell adhesion, differentiation and proliferation. The mechanism by which the ECM influences the cell cycle in vivo is poorly understood. Here we demonstrate that the β integrin PAT-3 regulates the localization and expression of CKI-1, a C. elegans homologue of the cyclin dependent kinase inhibitor p27(KIP1). In nematodes expressing wild type PAT-3, CKI-1::GFP localizes primarily to nucleoli in hypodermal cells, whereas in animals expressing mutant pat-3 with a defective splice junction, CKI-1::GFP appears clumped and disorganized in nucleoplasm. RNAi analysis links cell adhesion genes to the regulation of CKI-1. RNAi of unc-52/perlecan, ina-1/α integrin, pat-4/ILK, and unc-97/PINCH resulted in abnormal CKI-1::GFP localization. Additional RNAi experiments revealed that the SCF E3 ubiquitin-ligase complex genes, skpt-1/SKP2, cul-1/CUL1 and lin-23/F-box, are required for the proper localization and expression of CKI-1, suggesting that integrin signaling and SCF E3 ligase work together to regulate the cellular distribution of CKI-1. These data also suggest that integrin plays a major role in maintaining proper CKI-1/p27(KIP1) levels in the cell. Perturbed integrin signaling may lead to the inhibition of SCF ligase activity, mislocalization and elevation of CKI-1/p27(KIP1). These results suggest that adhesion signaling is crucial for cell cycle regulation in vivo.
Collapse
Affiliation(s)
- Shingo Kihira
- Department of Biology, Baylor University, Waco, Texas, United States of America
| | - Eun Jeong Yu
- Department of Biology, Baylor University, Waco, Texas, United States of America
| | - Jessica Cunningham
- Department of Biology, Baylor University, Waco, Texas, United States of America
| | - Erin J. Cram
- Department of Biology, Northeastern University, Boston, Massachusetts, United States of America
| | - Myeongwoo Lee
- Department of Biology, Baylor University, Waco, Texas, United States of America
| |
Collapse
|
4
|
Wong MC, Schwarzbauer JE. Gonad morphogenesis and distal tip cell migration in the Caenorhabditis elegans hermaphrodite. WILEY INTERDISCIPLINARY REVIEWS. DEVELOPMENTAL BIOLOGY 2012; 1:519-31. [PMID: 23559979 PMCID: PMC3614366 DOI: 10.1002/wdev.45] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cell migration and morphogenesis are key events in tissue development and organogenesis. In Caenorhabditis elegans, the migratory path of the distal tip cells determines the morphology of the hermaphroditic gonad. The distal tip cells undergo a series of migratory phases interspersed with turns to form the gonad. A wide variety of genes have been identified as crucial to this process, from genes that encode components and modifiers of the extracellular matrix to signaling proteins and transcriptional regulators. The connections between extracellular and transmembrane protein functions and intracellular pathways are essential for distal tip cell migration, and the integration of this information governs gonad morphogenesis and determines gonad size and shape.
Collapse
Affiliation(s)
- Ming-Ching Wong
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| | | |
Collapse
|
5
|
Pines M, Fairchild MJ, Tanentzapf G. Distinct regulatory mechanisms control integrin adhesive processes during tissue morphogenesis. Dev Dyn 2011; 240:36-51. [PMID: 21089076 DOI: 10.1002/dvdy.22488] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Cell adhesion must be precisely regulated to enable both dynamic morphogenetic processes and the subsequent transition to stable tissue maintenance. Integrins link the intracellular cytoskeleton and extracellular matrix, relaying bidirectional signals across the plasma membrane. In vitro studies have demonstrated that multiple mechanisms control integrin-mediated adhesion; however, their roles during development are poorly understood. We used mutations that activate or deactivate specific functions of vertebrate β-integrins in vitro to investigate how perturbing Drosophila βPS-integrin regulation in developing embryos regulation affects tissue morphogenesis and maintenance. We found that morphogenetic processes use various β-integrin regulatory mechanisms to differing degrees and that conformational changes associated with outside-in activation are essential for developmental integrin functions. Long-term adhesion is also sensitive to integrin dysregulation, suggesting integrins must be continuously regulated to support stable tissue maintenance. Altogether, in vivo phenotypic analyses allowed us to identify the importance of various β-integrin regulatory mechanisms during different morphogenetic processes.
Collapse
Affiliation(s)
- Mary Pines
- Department of Cellular and Physiological Sciences, University of British Columbia, Life Sciences Institute, Vancouver, BC, Canada
| | | | | |
Collapse
|