Figure 5.

Current myosin inventories and nomenclature for selected organisms. Classes are designated by the letter M (myosin) followed by Arabic numerals corresponding to the class number. Genes predicted in full or in part from genomic sequence are indicated by an asterisk. Accession numbers are for cDNA/protein sequences or genomic clones (in square brackets). It should be noted that the numbering of the budding yeast myosins (MYO1–5) and the unconventional myosins from C. elegans (HUM1–8; heavy chain of unconventional myosin) and rat (myr1–8; myosin from rat) corresponds to the order of discovery in these organisms and not their phylogenetic class. Drosophila myosins have traditionally been referred to by their chromosomal locus, Dictyostelium myosins are lettered (MyoA-MyoM), and Arabidopsis myosins were named ATM (class VIII) and MYA (class XI). The nomenclature of the vertebrate myosins-I is particularly confusing because the assigned human gene names do not correspond clearly to previous names. A table of vertebrate myosin-I homologues can be found in Supplemental Materials available online at www.molbiolcell.org. Chr., chromosome; Rn, Rattus norvegicus; Mm, Mus musculus; Hs, Homo sapiens.