Myosin is a protein that binds to actin and has ATPase activity that is activated by actin. Myosin IB may have a role in chemotaxis and aggregation; it could serve to stabilize and even retract cortical structures, such as pseudopods and lamellopods. Involved in the whole cell motility of aggregation-stages cells. Overexpression results in significant decrease in the rate of cellular translocation and fluid-phase pinocytosis and abnormalities in the normal rearrangement of the actin cytoskeleton. Dictyostelium discoideum (taxid: 44689)
>sp|P34109|MYOD_DICDI Myosin ID heavy chain OS=Dictyostelium discoideum GN=myoD PE=1 SV=2
Myosin is a protein that binds to actin and has ATPase activity that is activated by actin. Myosin id may have a role in chemotaxis and aggregation; it could serve to stabilize and even retract cortical structures, such as pseudopods and lamellopods. Involved in the process of phagocytosis.
Actin-based motor protein, possibly involved in a wide range of motile processes, such as cell movement across a surface, and extension and retraction of pseudopodia or lamellipodia.
Dictyostelium discoideum (taxid: 44689)
Close Homologs in the Non-Redundant Database Detected by BLAST
Score = 61.9 bits (151), Expect = 1e-12
Identities = 24/51 (47%), Positives = 29/51 (56%), Gaps = 1/51 (1%)
Query: 17 SRVTYQAPGERNFHIFYQLLVGADVHLLRVVNMAEPMRFRFGRLQHTCYTV 67
SRV Q PGERNFHIFYQLL GA + + + P +R+ Q C V
Sbjct: 176 SRVVSQEPGERNFHIFYQLLAGASPEERKKLGLKRPESYRYLN-QGGCNDV 225
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 679
Score = 61.4 bits (150), Expect = 2e-12
Identities = 25/53 (47%), Positives = 31/53 (58%), Gaps = 1/53 (1%)
Query: 17 SRVTYQAPGERNFHIFYQLLVGADVHLLRVVNMAEPMRFRFGRLQHTCYTVAT 69
SRV QA GERN+HIFYQLL GA L + + + P +R+ Q C TV
Sbjct: 184 SRVVSQAKGERNYHIFYQLLAGASEELKKELGLKSPEDYRYLN-QGGCLTVDG 235
Large ATPases. ATPase; molecular motor. Muscle contraction consists of a cyclical interaction between myosin and actin. The core of the myosin structure is similar in fold to that of kinesin. Length = 677
>gnl|CDD|238673 cd01377, MYSc_type_II, Myosin motor domain, type II myosins
Myosin II mediates cortical contraction in cell motility, and is the motor in smooth and skeletal muscle. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 693
>gnl|CDD|238674 cd01378, MYSc_type_I, Myosin motor domain, type I myosins
Myosin I generates movement at the leading edge in cell motility, and class I myosins have been implicated in phagocytosis and vesicle transport. Myosin I, an unconventional myosin, does not form dimers. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 674
>gnl|CDD|238676 cd01380, MYSc_type_V, Myosin motor domain, type V myosins
Myosins V transport a variety of intracellular cargo processively along actin filaments, such as membraneous organelles and mRNA. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 691
>gnl|CDD|227355 COG5022, COG5022, Myosin heavy chain [Cytoskeleton]
Score = 45.9 bits (109), Expect = 6e-07
Identities = 21/65 (32%), Positives = 33/65 (50%), Gaps = 1/65 (1%)
Query: 17 SRVTYQAPGERNFHIFYQLLVGADVHLLRVVNMAEPMRFRFGRLQHTCYTVATTSVDTIF 76
SR+ Q+ ERN+HIFY+L GA + ++++ P FR+ T Y A D
Sbjct: 180 SRICVQSAEERNYHIFYRLCAGASEDIREKLHLSSPDDFRYLNRGCTRY-FANKETDKQI 238
Query: 77 PSSRR 81
+R+
Sbjct: 239 LQNRK 243
Myosin VI is a monomeric myosin, which moves towards the minus-end of actin filaments, in contrast to most other myosins. It has been implicated in endocytosis, secretion, and cell migration. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the minus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 717
>gnl|CDD|238679 cd01383, MYSc_type_VIII, Myosin motor domain, plant-specific type VIII myosins, a subgroup which has been associated with endocytosis, cytokinesis, cell-to-cell coupling and gating at plasmodesmata
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 677
>gnl|CDD|238683 cd01387, MYSc_type_XV, Myosin motor domain, type XV myosins
In vertebrates, myosin XV appears to be expressed in sensory tissue and play a role in hearing. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 677
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 674
>gnl|CDD|238677 cd01381, MYSc_type_VII, Myosin motor domain, type VII myosins
Myosins in this group have been associated with functions in sensory systems such as vision and hearing. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 671
>gnl|CDD|238681 cd01385, MYSc_type_IX, Myosin motor domain, type IX myosins
Myosin IX is a processive single-headed motor, which might play a role in signalling. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 692
>gnl|CDD|238675 cd01379, MYSc_type_III, Myosin motor domain, type III myosins
Myosin III has been shown to play a role in the vision process in insects and in hearing in mammals. Myosin III, an unconventional myosin, does not form dimers. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 653
>gnl|CDD|238682 cd01386, MYSc_type_XVIII, Myosin motor domain, type XVIII myosins
Score = 35.6 bits (82), Expect = 0.002
Identities = 21/47 (44%), Positives = 24/47 (51%), Gaps = 3/47 (6%)
Query: 17 SRVTYQAPGERNFHIFYQLLVGADVHL---LRVVNMAEPMRFRFGRL 60
SRV + GE NF +F QLL G D L L + MAE F G L
Sbjct: 177 SRVARRPNGETNFVVFSQLLAGVDGDLRTELHLEQMAESSSFGMGGL 223
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the filament (power stroke). Release of ADP completes the cycle. Length = 767
Myosins in this group have been associated with functions in sensory systems such as vision and hearing. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydr
>cd01380 MYSc_type_V Myosin motor domain, type V myosins
Myosins V transport a variety of intracellular cargo processively along actin filaments, such as membraneous organelles and mRNA. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an act
>cd01383 MYSc_type_VIII Myosin motor domain, plant-specific type VIII myosins, a subgroup which has been associated with endocytosis, cytokinesis, cell-to-cell coupling and gating at plasmodesmata
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates f
>cd01377 MYSc_type_II Myosin motor domain, type II myosins
Myosin II mediates cortical contraction in cell motility, and is the motor in smooth and skeletal muscle. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydro
>cd01384 MYSc_type_XI Myosin motor domain, plant-specific type XI myosin, involved in organelle transport
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new act
>cd01387 MYSc_type_XV Myosin motor domain, type XV myosins
In vertebrates, myosin XV appears to be expressed in sensory tissue and play a role in hearing. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis caus
>cd01378 MYSc_type_I Myosin motor domain, type I myosins
Myosin I generates movement at the leading edge in cell motility, and class I myosins have been implicated in phagocytosis and vesicle transport. Myosin I, an unconventional myosin, does not form dimers. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 picon
>cd01385 MYSc_type_IX Myosin motor domain, type IX myosins
Myosin IX is a processive single-headed motor, which might play a role in signalling. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the hea
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the head to pivot and move the fila
Large ATPases. ATPase; molecular motor. Muscle contraction consists of a cyclical interaction between myosin and actin. The core of the myosin structure is similar in fold to that of kinesin.
>cd01382 MYSc_type_VI Myosin motor domain, type VI myosins
Myosin VI is a monomeric myosin, which moves towards the minus-end of actin filaments, in contrast to most other myosins. It has been implicated in endocytosis, secretion, and cell migration. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the minus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of
>PF00063 Myosin_head: Myosin head (motor domain); InterPro: IPR001609 Muscle contraction is caused by sliding between the thick and thin filaments of the myofibril
Myosin is a major component of thick filaments and exists as a hexamer of 2 heavy chains [], 2 alkali light chains, and 2 regulatory light chains. The heavy chain can be subdivided into the N-terminal globular head and the C-terminal coiled-coil rod-like tail, although some forms have a globular region in their C-terminal. There are many cell-specific isoforms of myosin heavy chains, coded for by a multi-gene family []. Myosin interacts with actin to convert chemical energy, in the form of ATP, to mechanical energy []. The 3-D structure of the head portion of myosin has been determined [] and a model for actin-myosin complex has been constructed []. The globular head is well conserved, some highly-conserved regions possibly relating to functional and structural domains []. The rod-like tail starts with an invariant proline residue, and contains many repeats of a 28 residue region, interrupted at 4 regularly-spaced points known as skip residues. Although the sequence of the tail is not well conserved, the chemical character is, hydrophobic, charged and skip residues occuring in a highly ordered and repeated fashion [].; GO: 0003774 motor activity, 0005524 ATP binding, 0016459 myosin complex; PDB: 1LKX_A 2V26_A 2BKI_A 3L9I_A 2BKH_A 2X51_A 2VB6_A 2VAS_A 1OE9_A 1W8J_A ....
>cd01386 MYSc_type_XVIII Myosin motor domain, type XVIII myosins
This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the myosin head dissociates from an actin filament. ATP hydrolysis causes the head to pivot and associate with a new actin subunit. The release of Pi causes the
>cd01379 MYSc_type_III Myosin motor domain, type III myosins
Myosin III has been shown to play a role in the vision process in insects and in hearing in mammals. Myosin III, an unconventional myosin, does not form dimers. This catalytic (head) domain has ATPase activity and belongs to the larger group of P-loop NTPases. Myosins are actin-dependent molecular motors that play important roles in muscle contraction, cell motility, and organelle transport. The head domain is a molecular motor, which utilizes ATP hydrolysis to generate directed movement toward the plus end along actin filaments. A cyclical interaction between myosin and actin provides the driving force. Rates of ATP hydrolysis and consequently the speed of movement along actin filaments vary widely, from about 0.04 micrometer per second for myosin I to 4.5 micrometer per second for myosin II in skeletal muscle. Myosin II moves in discrete steps about 5-10 nm long and generates 1-5 piconewtons of force. Upon ATP binding, the
>PF07499 RuvA_C: RuvA, C-terminal domain; InterPro: IPR011114 In prokaryotes, RuvA, RuvB, and RuvC process the universal DNA intermediate of homologous recombination, termed Holliday junction
The tetrameric DNA helicase RuvA specifically binds to the Holliday junction and facilitates the isomerization of the junction from the stacked folded configuration to the square-planar structure []. In the RuvA tetramer, each subunit consists of three domains, I, II and III, where I and II form the major core that is responsible for Holliday junction binding and base pair rearrangements of Holliday junction executed at the crossover point, whereas domain III regulates branch migration through direct contact with RuvB. The domain represents the C-terminal domain III of RuvA. This domain plays a significant role in the ATP-dependent branch migration of the hetero-duplex through direct contact with RuvB []. Within the Holliday junction, this domain makes no interaction with the DNA.; GO: 0005524 ATP binding, 0009378 four-way junction helicase activity, 0006281 DNA repair, 0006310 DNA recombination, 0009379 Holliday junction helicase complex; PDB: 1HJP_A 1CUK_A 1C7Y_A 1IXS_A 1IXR_B 1BVS_E 2ZTC_A 2ZTD_B 2H5X_A.
Scallop Myosin S1 Complexed With Mgadp:vanadate-Tra
8e-04
>pdb|1LVK|A Chain A, X-Ray Crystal Structure Of The Mg (Dot) 2'(3')-O-(N- Methylanthraniloyl) Nucleotide Bound To Dictyostelium Discoideum Myosin Motor Domain Length = 762
>pdb|1MMN|A Chain A, X-Ray Structures Of The Mgadp, Mgatpgammas, And Mgamppnp Complexes Of The Dictyostelium Discoideum Myosin Motor Domain Length = 762
>pdb|1MMG|A Chain A, X-Ray Structures Of The Mgadp, Mgatpgammas, And Mgamppnp Complexes Of The Dictyostelium Discoideum Myosin Motor Domain Length = 762
>pdb|3MYH|X Chain X, Insights Into The Importance Of Hydrogen Bonding In The Gamma- Phosphate Binding Pocket Of Myosin: Structural And Functional Studies Of Ser236 Length = 762
>pdb|1MMA|A Chain A, X-Ray Structures Of The Mgadp, Mgatpgammas, And Mgamppnp Complexes Of The Dictyostelium Discoideum Myosin Motor Domain Length = 762
>pdb|2Y9E|X Chain X, Structural Basis For The Allosteric Interference Of Myosin Function By Mutants G680a And G680v Of Dictyostelium Myosin-2 Length = 758
>pdb|2Y0R|X Chain X, Structural Basis For The Allosteric Interference Of Myosin Function By Mutants G680a And G680v Of Dictyostelium Myosin-2 Length = 758
>pdb|2AKA|A Chain A, Structure Of The Nucleotide-Free Myosin Ii Motor Domain From Dictyostelium Discoideum Fused To The Gtpase Domain Of Dynamin 1 From Rattus Norvegicus Length = 776
>pdb|1QVI|A Chain A, Crystal Structure Of Scallop Myosin S1 In The Pre-Power Stroke State To 2.6 Angstrom Resolution: Flexibility And Function In The Head Length = 840
>1g8x_A Myosin II heavy chain fused to alpha-actinin 3; motor, lever ARM, protein engineering, structural protein; HET: ADP; 2.80A {Dictyostelium discoideum} SCOP: k.1.1.1
