4LX2

Crystal structure of Myo5a globular tail domain in complex with melanophilin GTBD

Summary for 4LX2

• Entry DOI: 10.2210/pdb4lx2/pdb
• Related: 4LWZ 4LX0 4LX1
• Descriptor: Unconventional myosin-Va, Melanophilin, 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID, ... (4 entities in total)
• Functional Keywords: dil, contractile protein-protein transport complex, contractile protein/protein transport
• Biological source: Homo sapiens (human); More
• Cellular location: Melanosome: Q91V27
• Total number of polymer chains: 2
• Total formula weight: 48358.97

Authors

Pylypenko, O.,Attanda, W.,Gauquelin, C.,Houdusse, A. (deposition date: 2013-07-29, release date: 2013-11-20, Last modification date: 2023-09-20)

Primary citation

Pylypenko, O.,Attanda, W.,Gauquelin, C.,Lahmani, M.,Coulibaly, D.,Baron, B.,Hoos, S.,Titus, M.A.,England, P.,Houdusse, A.M.
Structural basis of myosin V Rab GTPase-dependent cargo recognition.
Proc.Natl.Acad.Sci.USA, 110:20443-20448, 2013

PubMed Abstract: Specific recognition of the cargo that molecular motors transport or tether to cytoskeleton tracks allows them to perform precise cellular functions at particular times and positions in cells. However, very little is known about how evolution has favored conservation of functions for some isoforms, while also allowing for the generation of new recognition sites and specialized cellular functions. Here we present several crystal structures of the myosin Va or the myosin Vb globular tail domain (GTD) that gives insights into how the motor is linked to the recycling membrane compartments via Rab11 or to the melanosome membrane via recognition of the melanophilin adaptor that binds to Rab27a. The structures illustrate how the Rab11-binding site has been conserved during evolution and how divergence at another site of the GTD allows more specific interactions such as the specific recognition of melanophilin by the myosin Va isoform. With atomic structural insights, these structures also show how either the partner or the GTD structural plasticity upon association is critical for selective recruitment of the motor.

PubMed: 24248336
DOI: 10.1073/pnas.1314329110

Experimental method

X-RAY DIFFRACTION (1.5 Å)