The use of restriction fragment length polymorphisms and DNA duplications to study the organization of the actin multigene family in Dictyostelium discoideum

• Published in: Genetics (Austin) Vol. 112; no. 1; pp. 27 - 42
• Main Authors: Welker, D.L, Hirth, K.P, Romans, P, Noegel, A, Firtel, R.A, Williams, K.L
• Format: Journal Article
• Language: English
• Published: Bethesda, MD Genetics Soc America 01-01-1986; Genetics Society of America
• Subjects: Actins - genetics; ADN; Biological and medical sciences; CHAMPIGNON; Dictyostelium - genetics; Dictyostelium discoideum; DNA; DNA Restriction Enzymes; DNA, Fungal - genetics; Fundamental and applied biological sciences. Psychology; FUNGI; GENE; GENES; Genes, Fungal; Genes. Genome; Genetic Linkage; GENETIC VARIATION; Haploidy; Investigations; Molecular and cellular biology; Molecular genetics; Polymorphism, Genetic; PROTEINAS; PROTEINE; PROTEINS; Protozoa; VARIACION GENETICA; VARIATION GENETIQUE; Dictyostelium discoideum; Protozoa; Length; Actins; Restriction fragment; Multigene family; Gene organization; Mycetozoa; Polymorphism
• DOI: 10.1093/genetics/112.1.27
• EISSN: 1943-2631
• ISSN: 0016-6731; 1943-2631

The techniques of restriction fragment length polymorphism analysis and examination of gene copy number in duplication-bearing Dictyostelium discoideum strains have been used to map four actin genes of the wild-type strain NC4 to specific linkage groups. In part, this was accomplished by identification of restriction fragments corresponding to particular cloned actin genes using gene-specific probes from unique sequence 5' and 3' untranslated regions. Cloned gene Actin 8 (designation act-8) maps to linkage group I; Actins 12 (act-12) and M6 (actM6) to linkage group II. An uncloned gene (act-100) also maps to linkage group II in the same region as actM6, as defined by a chromosomal duplication. From analysis of other wild isolates of D. discoideum, it was determined that in these isolates at least two actin genes map to linkage group I and at least four map to linkage group II. These results demonstrate the utility of molecular techniques in genetic analysis of Dictyostelium, particularly for developmentally regulated genes that have been cloned but that have no identified mutant phenotypes.