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Scholtes GK, Sawyer AM, Vaca CC, Clerc I, Roh M, Song C, D'Aquila RT. The von Hippel-Lindau Cullin-RING E3 ubiquitin ligase regulates APOBEC3 cytidine deaminases. Transl Res 2021; 237:1-15. [PMID: 34004371 PMCID: PMC8440357 DOI: 10.1016/j.trsl.2021.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 10/21/2022]
Abstract
The 7 members of the A3 family of cytidine deaminases (A3A to A3H) share a conserved catalytic activity that converts cytidines in single-stranded (ss) DNA into uridines, thereby inducing mutations. After their initial identification as cell-intrinsic defenses against HIV and other retroviruses, A3s were also found to impair many additional viruses. Moreover, some of the A3 proteins (A3A, A3B, and A3H haplotype I) are dysregulated in cancer cells, thereby causing chromosomal mutations that can be selected to fuel progression of malignancy. Viral mechanisms that increase transcription of A3 genes or induce proteasomal degradation of A3 proteins have been characterized. However, only a few underlying biological mechanisms regulating levels of A3s in uninfected cells have been described. Here, we characterize that the von Hippel-Lindau tumor suppressor (pVHL), via its CRLpVHL, induces degradation of all 7 A3 proteins. Two independent lines of evidence supported the conclusion that the multiprotein CRLpVHL complex is necessary for A3 degradation. CRLpVHL more effectively induced degradation of nuclear, procancer A3 (A3B) than the cytoplasmic, antiretroviral A3 (A3G). These results identify specific cellular factors that regulate A3s post-translationally.
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Affiliation(s)
- Gael K Scholtes
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Aubrey M Sawyer
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Cristina C Vaca
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Isabelle Clerc
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Meejeon Roh
- Division of Hematology and Oncology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Chisu Song
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Richard T D'Aquila
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois.
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Brown WL, Law EK, Argyris PP, Carpenter MA, Levin-Klein R, Ranum AN, Molan AM, Forster CL, Anderson BD, Lackey L, Harris RS. A Rabbit Monoclonal Antibody against the Antiviral and Cancer Genomic DNA Mutating Enzyme APOBEC3B. Antibodies (Basel) 2019; 8:antib8030047. [PMID: 31544853 PMCID: PMC6783943 DOI: 10.3390/antib8030047] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 12/18/2022] Open
Abstract
The DNA cytosine deaminase APOBEC3B (A3B) is normally an antiviral factor in the innate immune response. However, A3B has been implicated in cancer mutagenesis, particularly in solid tumors of the bladder, breast, cervix, head/neck, and lung. Here, we report data on the generation and characterization of a rabbit monoclonal antibody (mAb) for human A3B. One mAb, 5210-87-13, demonstrates utility in multiple applications, including ELISA, immunoblot, immunofluorescence microscopy, and immunohistochemistry. In head-to-head tests with commercial reagents, 5210-87-13 was the only rabbit monoclonal suitable for detecting native A3B and for immunohistochemical quantification of A3B in tumor tissues. This novel mAb has the potential to enable a wide range of fundamental and clinical studies on A3B in human biology and disease.
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Affiliation(s)
- William L Brown
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Emily K Law
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
- Howard Hughes Medical Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Prokopios P Argyris
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
- Division of Oral and Maxillofacial Pathology, School of Dentistry, University of Minnesota, Minneapolis, MN 55455, USA
| | - Michael A Carpenter
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
- Howard Hughes Medical Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Rena Levin-Klein
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Alison N Ranum
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Amy M Molan
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Colleen L Forster
- Clinical and Translational Science Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Brett D Anderson
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Lela Lackey
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Biology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Reuben S Harris
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA.
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.
- Institute for Molecular Virology, University of Minnesota, Minneapolis, MN 55455, USA.
- Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
- Howard Hughes Medical Institute, University of Minnesota, Minneapolis, MN 55455, USA.
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