8W41 | pdb_00008w41

Cryo-EM structure of Myosin VI in the autoinhibited state

External Resource: Annotation


Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
C [auth A]SCOP2B SuperfamilyMyosin VI CBD-like 8094331 3002524 SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
C [auth A]PF21521Myosin VI, lever arm (MYO6_lever)Myosin VI, lever armThis entry represents the lever arm from the unconventional myosin 6 proteins, the only class of myosin that has been shown to move toward the minus-end of actin filaments. This domain comprises an insert (Insert2) that binds the structural calmoduli ...This entry represents the lever arm from the unconventional myosin 6 proteins, the only class of myosin that has been shown to move toward the minus-end of actin filaments. This domain comprises an insert (Insert2) that binds the structural calmodulin (CaM) followed by the IQ motif and a proximal tail domain described as the lever arm extension [1-5]. The lever arm amplifies the conformational changes in the motor into a movement on the order of nanometers known as the powerstroke.
Domain
C [auth A]PF00063Myosin head (motor domain) (Myosin_head)Myosin head (motor domain)Domain
C [auth A]PF16521Myosin VI cargo binding domain (Myosin-VI_CBD)Myosin VI cargo binding domainMyosin-VI_CBD is a C-terminal family that allows unconventional myosin-VI to recognise and select its binding cargoes. Several adaptor proteins have been reported to interact specifically with the CBD, thus defining the specific subcellular functions ...Myosin-VI_CBD is a C-terminal family that allows unconventional myosin-VI to recognise and select its binding cargoes. Several adaptor proteins have been reported to interact specifically with the CBD, thus defining the specific subcellular functions of myosin VI. The crystal structure determination of the myosin VI CBD/Dab2 (an endocytic adaptor protein Disabled-2 that is a cargo) complex shows that the Myosin-VI_CBD forms a cargo-induced dimer, suggesting that the motor undergoes monomer-to-dimer conversion that is dependent upon cargo binding. In the absence of cargo myosin VI exists as a stable monomer. This cargo binding-mediated monomer-to-dimer conversion mechanism adopted by myosin VI may be shared by other unconventional myosins, such as myosin VII and myosin X [1].
Domain
A [auth B],
B [auth I]		PF13499EF-hand domain pair (EF-hand_7)EF-hand domain pairDomain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
C [auth A]Unconventional myosin-VI
A [auth B],
B [auth I]		Calmodulin-1

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
C [auth A]IPR027417P-loop containing nucleoside triphosphate hydrolaseHomologous Superfamily
C [auth A]IPR004009Myosin, SH3 domainDomain
C [auth A]IPR032412Myosin VI, cargo binding domainDomain
C [auth A]IPR036961Kinesin motor domain superfamilyHomologous Superfamily
C [auth A]IPR001609Myosin head, motor domain-likeDomain
C [auth A]IPR049016Myosin VI, lever armDomain
C [auth A]IPR036114Class VI myosin, motor domainDomain
C [auth A]IPR008989Myosin S1 fragment, N-terminalHomologous Superfamily
A [auth B],
B [auth I]		IPR002048EF-hand domainDomain
A [auth B],
B [auth I]		IPR050230Calmodulin/Myosin light chain/Troponin C-likeFamily
A [auth B],
B [auth I]		IPR018247EF-Hand 1, calcium-binding siteBinding Site
A [auth B],
B [auth I]		IPR011992EF-hand domain pairHomologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
C [auth A]Pharos:  Q9UM54