title: Rapid identification of angulata leaf mutations using next-generation sequencing.
abstract: Map-based (positional) cloning has traditionally been the preferred strategy for identifying the causal genes underlying the phenotypes of mutants isolated in forward genetic screens. Massively parallel sequencing technologies are enabling the rapid cloning of genes identified in such screens. We have used a combination of linkage mapping and whole-genome re-sequencing to identify the causal mutations in four loss-of-function angulata (anu) mutants. These mutants were isolated in a screen for mutants with defects in leaf shape and leaf pigmentation. Our results show that the anu1-1, anu4-1, anu9-1 and anu12-1 mutants carry new alleles of the previously characterized SECA2, TRANSLOCON AT THE OUTER MEMBRANE OF CHLOROPLASTS 33 (TOC33), NON-INTRINSIC ABC PROTEIN 14 (NAP14) and CLP PROTEASE PROTEOLYTIC SUBUNIT 1 (CLPR1) genes. Re-sequencing the genomes of fine mapped mutants is a feasible approach that has allowed us to identify a moderate number of candidate mutations, including the one that causes the mutant phenotype, in a nonstandard genetic background. Our results indicate that anu mutations specifically affect plastid-localized proteins involved in diverse processes, such as the movement of peptides through chloroplast membranes (ANU1 and ANU4), metal homeostasis (ANU9) and protein degradation (ANU12).
authors.affiliation: Instituto de Bioingeniería, Universidad Miguel Hernández, Campus de Elche, 03202, Elche, Alicante, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Mateo-Bonmatí
authors.forename: Rubén
authors.initials: R
authors.lastname: Casanova-Sáez
authors.forename: Héctor
authors.initials: H
authors.lastname: Candela
authors.forename: José Luis
authors.initials: JL
authors.lastname: Micol
mesh_terms: D017360:Arabidopsis / Q000033:anatomy & histology / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000235:genetics*; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics; D003116:Color; D005020:Ethyl Methanesulfonate / Q000494:pharmacology; D005240:Feasibility Studies; D005796:Genes; D018745:Genome, Plant / Q000235:genetics; D005838:Genotype; D059014:High-Throughput Nucleotide Sequencing / Q000379:methods*; D016296:Mutagenesis / Q000187:drug effects; D009153:Mutagens / Q000494:pharmacology; D009154:Mutation; D010641:Phenotype; D010858:Pigmentation / Q000235:genetics; D018515:Plant Leaves / Q000033:anatomy & histology / Q000235:genetics*; D030821:Plants, Genetically Modified; D018087:Plastids / Q000187:drug effects / Q000235:genetics; D015203:Reproducibility of Results
chemical_list: D029681:Arabidopsis Proteins; D009153:Mutagens; D005020:Ethyl Methanesulfonate
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