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Ray DM, Flood JR, David Y. Harnessing Split-Inteins as a Tool for the Selective Modification of Surface Receptors in Live Cells. Chembiochem 2023; 24:e202200487. [PMID: 36178424 PMCID: PMC9977608 DOI: 10.1002/cbic.202200487] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/29/2022] [Indexed: 02/04/2023]
Abstract
Biochemical studies of integral membrane proteins are often hampered by low purification yields and technical limitations such as aggregation causing in vitro manipulations to be challenging. The ability of controlling proteins in live cells bypasses these limitations while broadening the scope of accessible questions owing to the proteins being in their native environment. Here we take advantage of the intein biorthogonality to mammalian systems, site specificity, fast kinetics, and auto-processing nature as an attractive option for modifying surface proteins. Using EGFR as a model, we demonstrate that the split-intein pair AvaN /NpuC can be used to efficiently and specifically modify target membrane proteins with a synthetic adduct for downstream live cell application.
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Affiliation(s)
- Devin M Ray
- Tri-Institutional PhD Program in Chemical Biology, New York, NY, 10065, USA
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
- Tri-Institutional MD-PhD Program, New York, NY 10065, USA
| | - Julia R Flood
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Yael David
- Tri-Institutional PhD Program in Chemical Biology, New York, NY, 10065, USA
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
- Department of Pharmacology, Weill Cornell Medical College, New York, NY 10065, USA
- Department of Physiology, Biophysics and Systems Biology, Weill Cornell Medical College, New York, NY, 10065, USA
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Ray DM, Flood JR, David Y. Harnessing Split‐Inteins as a Tool for the Selective Modification of Surface Receptors in Live Cells. Chembiochem 2022. [DOI: 10.1002/cbic.202200654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Devin M. Ray
- Tri-Institutional PhD Program in Chemical Biology New York NY, 10065 USA
- Chemical Biology Program Memorial Sloan Kettering Cancer Center New York NY, 10065 USA
- Tri-Institutional MD-PhD Program New York NY 10065 USA
| | - Julia R. Flood
- Chemical Biology Program Memorial Sloan Kettering Cancer Center New York NY, 10065 USA
| | - Yael David
- Tri-Institutional PhD Program in Chemical Biology New York NY, 10065 USA
- Chemical Biology Program Memorial Sloan Kettering Cancer Center New York NY, 10065 USA
- Department of Pharmacology Weill Cornell Medical College New York NY 10065 USA
- Department of Physiology Biophysics and Systems Biology Weill Cornell Medical College New York NY, 10065 USA
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Abstract
Because of their long half-lives and highly nucleophilic tails, histones are particularly susceptible to accumulating nonenzymatic covalent modifications, such as glycation. The resulting modifications can have profound effects on cellular physiology due to the regulatory role histones play in all DNA-templated processes; however, the complexity of Maillard chemistry on proteins makes tracking and enriching for glycated proteins a challenging task. Here, we characterize glyoxal (GO) modifications on histones using quantitative proteomics and an aniline-derived GO-reactive probe. In addition, we leverage this chemistry to demonstrate that the glycation regulatory proteins DJ-1 and GLO1 reduce levels of histone GO adducts. Finally, we employ a two-round pull-down method to enrich histone H3 GO glycation and map these adducts to specific chromatin regions.
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Affiliation(s)
- Devin M. Ray
- Tri-Institutional MD-PhD Program, New York, New York 10065, United States
- Tri-Institutional PhD Program in Chemical Biology, New York, New York 10065, United States
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Erin Q. Jennings
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Igor Maksimovic
- Tri-Institutional PhD Program in Chemical Biology, New York, New York 10065, United States
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Xander Chai
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - James J. Galligan
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Yael David
- Tri-Institutional PhD Program in Chemical Biology, New York, New York 10065, United States
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
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Bulut E, Shoemaker T, Karakaya J, Ray DM, Mealy MA, Levy M, Izbudak I. MRI Predictors of Recurrence and Outcome after Acute Transverse Myelitis of Unidentified Etiology. AJNR Am J Neuroradiol 2019; 40:1427-1432. [PMID: 31296526 DOI: 10.3174/ajnr.a6121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 06/06/2019] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND PURPOSE The early prediction of recurrence after an initial event of transverse myelitis helps to guide preventive treatment and optimize outcomes. Our aim was to identify MR imaging findings predictive of relapse and poor outcome in patients with acute transverse myelitis of unidentified etiology. MATERIALS AND METHODS Spinal MRIs of 77 patients (mean age, 36.3 ± 20 years) diagnosed with acute transverse myelitis were evaluated retrospectively. Only the patients for whom an underlying cause of myelitis could not be identified within 3 months of symptom onset were included. Initial spinal MR images of patients were examined in terms of lesion extent, location and distribution, brain stem extension, cord expansion, T1 signal, contrast enhancement, and the presence of bright spotty lesions and the owl's eyes sign. The relapse rates and Kurtzke Expanded Disability Status Scale scores at least 1 year (range, 1-14 years) after a myelitis attack were also recorded. Associations of MR imaging findings with clinical variables were studied with univariate associations and binary log-linear regression. Differences were considered significant for P values < .05. RESULTS Twenty-seven patients (35.1%) eventually developed recurrent disease. Binary logistic regression revealed 3 main significant predictors of recurrence: cord expansion (OR, 5.30; 95% CI, 1.33-21.11), contrast enhancement (OR, 5.05; 95% CI, 1.25-20.34), and bright spotty lesions (OR, 3.63; 95% CI, 1.06-12.43). None of the imaging variables showed significant correlation with the disability scores. CONCLUSIONS Cord expansion, contrast enhancement, and the presence of bright spotty lesions could be used as early MR imaging predictors of relapse in patients with acute transverse myelitis of unidentified etiology. Collaborative studies with a larger number of patients are required to validate these findings.
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Affiliation(s)
- E Bulut
- From the Departments of Radiology (E.B.)
| | - T Shoemaker
- Department of Neurology (T.S., M.A.M., M.L.)
- Department of Neurological Sciences (T.S.), Rush University Medical Center, Chicago, Illinois
| | - J Karakaya
- Statistics (J.K.), Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - D M Ray
- Division of Neuroradiology (D.M.R., I.I.), The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - M A Mealy
- Department of Neurology (T.S., M.A.M., M.L.)
| | - M Levy
- Department of Neurology (T.S., M.A.M., M.L.)
- Department of Neurology (M.L.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - I Izbudak
- Division of Neuroradiology (D.M.R., I.I.), The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Osunsade A, Prescott NA, Hebert JM, Ray DM, Jmeian Y, Lorenz IC, David Y. A Robust Method for the Purification and Characterization of Recombinant Human Histone H1 Variants. Biochemistry 2019; 58:171-176. [PMID: 30585724 PMCID: PMC6541009 DOI: 10.1021/acs.biochem.8b01060] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Higher order compaction of the eukaryotic genome is key to the regulation of all DNA-templated processes, including transcription. This tightly controlled process involves the formation of mononucleosomes, the fundamental unit of chromatin, packaged into higher order architectures in an H1 linker histone-dependent process. While much work has been done to delineate the precise mechanism of this event in vitro and in vivo, major gaps still exist, primarily due to a lack of molecular tools. Specifically, there has never been a successful purification and biochemical characterization of all human H1 variants. Here we present a robust method to purify H1 and illustrate its utility in the purification of all somatic variants and one germline variant. In addition, we performed a first ever side-by-side biochemical comparison, which revealed a gradient of nucleosome binding affinities and compaction capabilities. These data provide new insight into H1 redundancy and lay the groundwork for the mechanistic investigation of disease-driving mutations.
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Affiliation(s)
- Adewola Osunsade
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Tri-Institutional PhD Program in Chemical Biology, New York, NY
| | - Nicholas A. Prescott
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Tri-Institutional PhD Program in Chemical Biology, New York, NY
| | - Jakob M. Hebert
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Tri-Institutional PhD Program in Chemical Biology, New York, NY
| | - Devin M. Ray
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Tri-Institutional PhD Program in Chemical Biology, New York, NY
- Tri-Institutional MD-PhD Program, New York, NY
| | - Yazen Jmeian
- Tri-Institutional Therapeutics Discovery Institute, New York, NY
| | - Ivo C. Lorenz
- Tri-Institutional Therapeutics Discovery Institute, New York, NY
| | - Yael David
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Tri-Institutional PhD Program in Chemical Biology, New York, NY
- Department of Pharmacology, Weill Cornell Medical College, New York, NY
- Department of Physiology, Biophysics and Systems Biology, Weill Cornell Medical College, New York, NY
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Angeles-Dunham VV, Nickerson DM, Ray DM, Mattson AE. Nitrimines as Reagents for Metal-Free Formal C(sp2)-C(sp2) Cross-Coupling Reactions. Angew Chem Int Ed Engl 2014; 53:14538-41. [DOI: 10.1002/anie.201408613] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 10/14/2014] [Indexed: 11/10/2022]
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Angeles-Dunham VV, Nickerson DM, Ray DM, Mattson AE. Nitrimines as Reagents for Metal-Free Formal C(sp2)-C(sp2) Cross-Coupling Reactions. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ray DM, Myers PH, Painter JT, Hoenerhoff MJ, Olden K, Roberts JD. Inhibition of transforming growth factor-β-activated kinase-1 blocks cancer cell adhesion, invasion, and metastasis. Br J Cancer 2012; 107:129-36. [PMID: 22644295 PMCID: PMC3389413 DOI: 10.1038/bjc.2012.214] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Tumour cell metastasis involves cell adhesion and invasion, processes that depend on signal transduction, which can be influenced by the tumour microenvironment. N-6 polyunsaturated fatty acids, found both in the diet and in response to inflammatory responses, are important components of this microenvironment. METHODS We used short hairpin RNA (shRNA) knockdown of TGF-β-activated kinase-1 (TAK1) in human tumour cells to examine its involvement in fatty acid-stimulated cell adhesion and invasion in vitro. An in vivo model of metastasis was developed in which cells, stably expressing firefly luciferase and either a control shRNA or a TAK1-specific shRNA, were injected into the mammary fat pads of mice fed diets, rich in n-6 polyunsaturated fatty acids. Tumour growth and spontaneous metastasis were monitored with in vivo and in situ imaging of bioluminescence. RESULTS Arachidonic acid activated TAK1 and downstream kinases in MDA-MB-435 breast cancer cells and led to increased adhesion and invasion. Knockdown of TAK1 blocked this activation and inhibited both cell adhesion and invasion in vitro. Tumour growth at the site of injection was not affected by TAK1 knockdown, but both the incidence and extent of metastasis to the lung were significantly reduced in mice injected with TAK1 knockdown cells compared with mice carrying control tumour cells. CONCLUSION These data demonstrate the importance of TAK1 signalling in tumour metastasis in vivo and suggest an opportunity for antimetastatic therapies.
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Affiliation(s)
- D M Ray
- Laboratory of Molecular Carcinogenesis, National Institute of Environmental Health Sciences, NIH, Mail Drop D2-05, Room D248A, Rall Building, 111T. W. Alexander Drive, Research Triangle Park, NC 27709, USA
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Abstract
This study assessed optimism held by 300 college students at a midwestern university using Scheier and Carver's Life Orientation Test. Optimism ratings were compared to measures of psychological functioning. Analysis showed that optimism was significantly associated with all of the adjustment measures (social, academic, personal, and goal commitment) assessed with Baker and Siryk's Student Adaptation to College Questionnaire, higher self-esteem measured with Rosenberg's Self-esteem scale, and with lower ratings of loneliness as assessed with the Revised UCLA Loneliness Scale.
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Affiliation(s)
- R L Montgomery
- Department of Psychology, University of Missouri-Rolla, 65401-0249, USA.
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Abstract
Stereotactic core biopsy of a 4-5-mm, suspicious mammographic lesion was complicated by substantial hematoma formation in a patient with subsequently diagnosed factor XI deficiency. As a result, the small infiltrating ductal carcinoma could no longer be identified at mammography to allow accurate needle localization for lumpectomy. Sufficient resorption of the hematoma at 3 months permitted successful needle localization and lumpectomy. In these cases, expectant management may obviate extensive surgery.
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Affiliation(s)
- B M Deutch
- Department of Radiology, Jacqueline M. Wilentz Comprehensive Breast Center, Monmouth Medical Center, Long Branch, NJ 07740, USA
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