Purification, crystallization and preliminary crystallographic analysis of the globular domain of the human type V myosin Myo5a.

Abstract

Type V myosins constitute the main cargo-transporting class of myosin motors in higher eukaryotes. They are mainly defined by their C-terminal globular domain, which is required for cargo binding as well as for motor auto-inhibition in the absence of cargo. To date, high-resolution structures only exist for globular domains from yeast. Since the majority of cellular cargoes in yeast are very different from the cargoes in higher eukaryotes, structural insights into the domain organization of globular domains from human type V myosins are important. The globular domain of human Myo5a was cloned, expressed and crystallized and data sets were collected. The crystals belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 75.04, b = 86.70, c = 131.41 Å, α = β = γ = 90°, and diffracted with data-collection quality to 2.5 Å resolution.