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Cogne Y, Gouveia D, Chaumot A, Degli-Esposti D, Geffard O, Pible O, Almunia C, Armengaud J. Proteogenomics-Guided Evaluation of RNA-Seq Assembly and Protein Database Construction for Emergent Model Organisms. Proteomics 2020; 20:e1900261. [PMID: 32249536 DOI: 10.1002/pmic.201900261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 03/24/2020] [Indexed: 11/10/2022]
Abstract
Proteogenomics is gaining momentum as, today, genomics, transcriptomics, and proteomics can be readily performed on any new species. This approach allows key alterations to molecular pathways to be identified when comparing conditions. For animals and plants, RNA-seq-informed proteomics is the most popular means of interpreting tandem mass spectrometry spectra acquired for species for which the genome has not yet been sequenced. It relies on high-performance de novo RNA-seq assembly and optimized translation strategies. Here, several pre-treatments for Illumina RNA-seq reads before assembly are explored to translate the resulting contigs into useful polypeptide sequences. Experimental transcriptomics and proteomics datasets acquired for individual Gammarus fossarum freshwater crustaceans are used, the most relevant procedure is defined by the ratio of MS/MS spectra assigned to peptide sequences. Removing reads with a mean quality score of less than 17-which represents a single probable nucleotide error on 150-bp reads-prior to assembly, increases the proteomics outcome. The best translation using Transdecoder is achieved with a minimal open reading frame length of 50 amino acids and systematic selection of ORFs longer than 900 nucleotides. Using these parameters, transcriptome assembly and translation informed by proteomics pave the way to further improvements in proteogenomics.
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Affiliation(s)
- Yannick Cogne
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, SPI, 30200, Bagnols-sur-Cèze, France
| | - Duarte Gouveia
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, SPI, 30200, Bagnols-sur-Cèze, France
| | - Arnaud Chaumot
- INRAE, UR RiverLY Laboratoire d'écotoxicologie, Centre de Lyon-Villeurbanne, Villeurbanne, F-69625, France
| | - Davide Degli-Esposti
- INRAE, UR RiverLY Laboratoire d'écotoxicologie, Centre de Lyon-Villeurbanne, Villeurbanne, F-69625, France
| | - Olivier Geffard
- INRAE, UR RiverLY Laboratoire d'écotoxicologie, Centre de Lyon-Villeurbanne, Villeurbanne, F-69625, France
| | - Olivier Pible
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, SPI, 30200, Bagnols-sur-Cèze, France
| | - Christine Almunia
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, SPI, 30200, Bagnols-sur-Cèze, France
| | - Jean Armengaud
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, SPI, 30200, Bagnols-sur-Cèze, France
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Keller JI, Lima-Cordón R, Monroy MC, Schmoker AM, Zhang F, Howard A, Ballif BA, Stevens L. Protein mass spectrometry detects multiple bloodmeals for enhanced Chagas disease vector ecology. INFECTION GENETICS AND EVOLUTION 2019; 74:103998. [PMID: 31401306 DOI: 10.1016/j.meegid.2019.103998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/22/2019] [Accepted: 08/07/2019] [Indexed: 10/26/2022]
Abstract
Chagas disease, a neglected tropical disease endemic in Latin America, is caused by the protozoan parasite Trypanosoma cruzi and is responsible for significant health impacts, especially in rural communities. The parasite is transmitted by insect vectors in the Triatominae subfamily and due to lack of vaccines and limited treatment options, vector control is the main way of controlling the disease. Knowing what vectors are feeding on directly enhances our understanding of the ecology and biology of the different vector species and can potentially aid in engaging communities in active disease control, a concept known as Ecohealth management. We evaluated bloodmeals in rural community, house-caught insect vectors previously evaluated for bloodmeals via DNA analysis as part of a larger collaborative project from three countries in Central America, including Guatemala. In addition to identifying bloodmeals in 100% of all samples using liquid chromatography tandem mass spectrometry (LC-MS/MS) (n = 50), strikingly for 53% of these samples there was no evidence of a recent bloodmeal by DNA-PCR. As individual vectors often feed on multiple sources, we developed an enhanced detection pipeline, and showed the ability to quantify a bloodmeal using stable-isotope-containing synthetic references peptides, a first step in further exploration of species-specific bloodmeal composition. Furthermore, we show that a lower resolution mass spectrometer is sufficient to correctly identify taxa from bloodmeals, an important and strong attribute of our LC-MS/MS-based method, opening the door to using proteomics in countries where Chagas disease is endemic.
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Affiliation(s)
- Judith I Keller
- Department of Biology, University of Vermont, Burlington, VT, United States
| | - Raquel Lima-Cordón
- Department of Biology, University of Vermont, Burlington, VT, United States
| | - M Carlota Monroy
- Laboratorio de Entomología Aplicada y Parasitología, Escuela de Biología, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Edificio T-10 Ciudad Universitaria Zona 12, Ciudad de Guatemala, Guatemala; Department of Biology, University of Vermont, Burlington, VT, United States
| | - Anna M Schmoker
- Department of Biology, University of Vermont, Burlington, VT, United States
| | - Fan Zhang
- Department of Biology, University of Vermont, Burlington, VT, United States
| | - Alan Howard
- Statistical Software Support and Consulting Services, University of Vermont, Burlington, VT, United States
| | - Bryan A Ballif
- Department of Biology, University of Vermont, Burlington, VT, United States.
| | - Lori Stevens
- Department of Biology, University of Vermont, Burlington, VT, United States.
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