Joakim Näsvall
Forskare vid Institutionen för medicinsk biokemi och mikrobiologi; Infektioner och Immunitet; Joakim Näsvall
- Mobiltelefon:
- 070-697 22 36
- E-post:
- joakim.nasvall@imbim.uu.se
- Besöksadress:
- BMC
Husargatan 3
752 37 UPPSALA - Postadress:
- Box 582
751 23 UPPSALA
- ORCID:
- 0000-0002-6831-3105
Forskning
Evolution av nya gener
Vår forskning fokuserar på en väldigt grundläggande fråga i evolutionsbiologi; hur nya gener bildas och hur de evolverar. En ny gen kan uppkomma i ett genom på tre olika sätt:
(A) Horisontell (lateral) genöverföring, då en gen förs over från en annan organism. (B) De novo-evolution, då en funktion uppkommer i en tidigare icke-funktionell DNA-sekvens. (C) Duplikation-divergens, då en ny funktion evolverar i en kopia av en duplicerad gen. Vår nuvarande forskning berör i huvudsak duplikation-divergens.
Vi använder experimentell evolution och genetiska metoder i bakteriella modellsystem för att studera hur genduplikation och –amplifiering, neutrala mutationer, “trade-offs” mellan olika funktioner och andra faktorer påverkar uppkomsten av nya funktioner och deras vidare evolution. Vi är också intresserade av andra frågor, som evolution av komponenterna i translationsapparaten och den genetiska koden.

Publikationer
Urval av publikationer
-
Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
Ingår i Molecular biology and evolution, s. 2918-2930, 2020
- DOI för Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
- Ladda ner fulltext (pdf) av Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
-
Ingår i Frontiers in Microbiology, 2020
- DOI för Synonymous mutations in rpsT lead to ribosomal assembly defects that can be compensated by mutations in fis and rpoA
- Ladda ner fulltext (pdf) av Synonymous mutations in rpsT lead to ribosomal assembly defects that can be compensated by mutations in fis and rpoA
-
Genetic adaptation to growth under laboratory conditions in Escherichia coli and Salmonella enterica
Ingår i Frontiers in Microbiology, 2018
- DOI för Genetic adaptation to growth under laboratory conditions in Escherichia coli and Salmonella enterica
- Ladda ner fulltext (pdf) av Genetic adaptation to growth under laboratory conditions in Escherichia coli and Salmonella enterica
-
Ingår i Molecular biology and evolution, s. 704-718, 2018
- DOI för Experimental Determination and Prediction of the Fitness Effects of Random Point Mutations in the Biosynthetic Enzyme HisA
- Ladda ner fulltext (pdf) av Experimental Determination and Prediction of the Fitness Effects of Random Point Mutations in the Biosynthetic Enzyme HisA
-
Ingår i PLOS ONE, 2017
- DOI för Direct and Inverted Repeat stimulated excision (DIRex): Simple, single-step, and scar-free mutagenesis of bacterial genes
- Ladda ner fulltext (pdf) av Direct and Inverted Repeat stimulated excision (DIRex): Simple, single-step, and scar-free mutagenesis of bacterial genes
-
Ingår i Nucleic Acids Research, 2017
- DOI för Duplication-Insertion Recombineering: a fast and scar-free method for efficient transfer of multiple mutations in bacteria
- Ladda ner fulltext (pdf) av Duplication-Insertion Recombineering: a fast and scar-free method for efficient transfer of multiple mutations in bacteria
-
Evolution of New Functions De Novo and from Preexisting Genes
Ingår i Cold Spring Harbor Perspectives in Biology, 2015
-
Real-Time Evolution of New Genes by Innovation, Amplification, and Divergence
Ingår i Science, s. 384-387, 2012
-
Activation of cryptic aminoglycoside resistance in Salmonella enterica
Ingår i Molecular Microbiology, s. 1464-1478, 2011
Senaste publikationer
-
Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
Ingår i Molecular biology and evolution, s. 2918-2930, 2020
- DOI för Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
- Ladda ner fulltext (pdf) av Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
-
Ingår i Frontiers in Microbiology, 2020
- DOI för Synonymous mutations in rpsT lead to ribosomal assembly defects that can be compensated by mutations in fis and rpoA
- Ladda ner fulltext (pdf) av Synonymous mutations in rpsT lead to ribosomal assembly defects that can be compensated by mutations in fis and rpoA
-
Ingår i Frontiers in Microbiology, 2020
- DOI för Mutational Pathways and Trade-Offs Between HisA and TrpF Functions: Implications for Evolution via Gene Duplication and Divergence
- Ladda ner fulltext (pdf) av Mutational Pathways and Trade-Offs Between HisA and TrpF Functions: Implications for Evolution via Gene Duplication and Divergence
-
Selection for novel metabolic capabilities in Salmonella enterica
Ingår i Evolution, s. 990-1000, 2019
- DOI för Selection for novel metabolic capabilities in Salmonella enterica
- Ladda ner fulltext (pdf) av Selection for novel metabolic capabilities in Salmonella enterica
-
Ingår i Journal of Biological Chemistry, s. 11481-11490, 2018
- DOI för Structural mechanism of AadA, a dual specificity aminoglycoside adenylyltransferase from Salmonella enterica
- Ladda ner fulltext (pdf) av Structural mechanism of AadA, a dual specificity aminoglycoside adenylyltransferase from Salmonella enterica
Alla publikationer
Artiklar i tidskrift
-
Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
Ingår i Molecular biology and evolution, s. 2918-2930, 2020
- DOI för Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
- Ladda ner fulltext (pdf) av Collateral toxicity limits the evolution of bacterial Release Factor 2 towards total omnipotence
-
Ingår i Frontiers in Microbiology, 2020
- DOI för Synonymous mutations in rpsT lead to ribosomal assembly defects that can be compensated by mutations in fis and rpoA
- Ladda ner fulltext (pdf) av Synonymous mutations in rpsT lead to ribosomal assembly defects that can be compensated by mutations in fis and rpoA
-
Ingår i Frontiers in Microbiology, 2020
- DOI för Mutational Pathways and Trade-Offs Between HisA and TrpF Functions: Implications for Evolution via Gene Duplication and Divergence
- Ladda ner fulltext (pdf) av Mutational Pathways and Trade-Offs Between HisA and TrpF Functions: Implications for Evolution via Gene Duplication and Divergence
-
Selection for novel metabolic capabilities in Salmonella enterica
Ingår i Evolution, s. 990-1000, 2019
- DOI för Selection for novel metabolic capabilities in Salmonella enterica
- Ladda ner fulltext (pdf) av Selection for novel metabolic capabilities in Salmonella enterica
-
Ingår i Journal of Biological Chemistry, s. 11481-11490, 2018
- DOI för Structural mechanism of AadA, a dual specificity aminoglycoside adenylyltransferase from Salmonella enterica
- Ladda ner fulltext (pdf) av Structural mechanism of AadA, a dual specificity aminoglycoside adenylyltransferase from Salmonella enterica
-
Genetic adaptation to growth under laboratory conditions in Escherichia coli and Salmonella enterica
Ingår i Frontiers in Microbiology, 2018
- DOI för Genetic adaptation to growth under laboratory conditions in Escherichia coli and Salmonella enterica
- Ladda ner fulltext (pdf) av Genetic adaptation to growth under laboratory conditions in Escherichia coli and Salmonella enterica
-
Ingår i Molecular biology and evolution, s. 704-718, 2018
- DOI för Experimental Determination and Prediction of the Fitness Effects of Random Point Mutations in the Biosynthetic Enzyme HisA
- Ladda ner fulltext (pdf) av Experimental Determination and Prediction of the Fitness Effects of Random Point Mutations in the Biosynthetic Enzyme HisA
-
Ingår i PLOS ONE, 2017
- DOI för Direct and Inverted Repeat stimulated excision (DIRex): Simple, single-step, and scar-free mutagenesis of bacterial genes
- Ladda ner fulltext (pdf) av Direct and Inverted Repeat stimulated excision (DIRex): Simple, single-step, and scar-free mutagenesis of bacterial genes
-
Ingår i Nucleic Acids Research, 2017
- DOI för Duplication-Insertion Recombineering: a fast and scar-free method for efficient transfer of multiple mutations in bacteria
- Ladda ner fulltext (pdf) av Duplication-Insertion Recombineering: a fast and scar-free method for efficient transfer of multiple mutations in bacteria
-
Structural and functional innovations in the real-time evolution of new (βα)8 barrel enzymes
Ingår i Proceedings of the National Academy of Sciences of the United States of America, s. 4727-4732, 2017
- DOI för Structural and functional innovations in the real-time evolution of new (βα)8 barrel enzymes
-
Evolution of antibiotic resistance without antibiotic exposure
Ingår i Antimicrobial Agents and Chemotherapy, 2017
- DOI för Evolution of antibiotic resistance without antibiotic exposure
- Ladda ner fulltext (pdf) av Evolution of antibiotic resistance without antibiotic exposure
-
Compensating the fitness costs of synonymous mutations
Ingår i Molecular biology and evolution, s. 1461-1477, 2016
- DOI för Compensating the fitness costs of synonymous mutations
- Ladda ner fulltext (pdf) av Compensating the fitness costs of synonymous mutations
-
Ingår i Journal of Biological Chemistry, s. 24657-24668, 2015
-
Structure of AadA from Salmonella enterica: a monomeric aminoglycoside (3'')(9) adenyltransferase
Ingår i Acta Crystallographica Section D, s. 2267-2277, 2015
- DOI för Structure of AadA from Salmonella enterica: a monomeric aminoglycoside (3'')(9) adenyltransferase
- Ladda ner fulltext (pdf) av Structure of AadA from Salmonella enterica: a monomeric aminoglycoside (3'')(9) adenyltransferase
-
Minor Fitness Costs in an Experimental Model of Horizontal Gene Transfer in Bacteria
Ingår i Molecular biology and evolution, s. 1220-1227, 2014
-
Real-Time Evolution of New Genes by Innovation, Amplification, and Divergence
Ingår i Science, s. 384-387, 2012
-
Activation of cryptic aminoglycoside resistance in Salmonella enterica
Ingår i Molecular Microbiology, s. 1464-1478, 2011
Artiklar, forskningsöversikt
-
Evolution of New Functions De Novo and from Preexisting Genes
Ingår i Cold Spring Harbor Perspectives in Biology, 2015
Manuskript (preprint)
-
Synonymous mutations that reduce S20 levels can be compensated by mutations in fis and rpoA
-
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Functional trade-offs during evolution of new functions in the HisA-TrpF system
-
Experimental evolution of novel metabolic capabilities in Salmonella enterica
-
Ribosomal protein L1 is required for balanced formation of ribosomal subunits
-
Crystal structure of AadA at 2.5 Å resolution - an aminoglycoside 3" adenyltransferase
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Intermittent selection directs evolution of a specialist enzyme to become a generalist
-