Qhov kev txav ntawm cov leeg nqaij luv tshwm sim thaum myosin taub hau khi rau actin thiab rub cov actin sab hauv. Qhov kev txiav txim no xav tau zog, uas yog muab los ntawm ATP. Myosin khi rau actin ntawm qhov chaw khi ntawm globular actin protein. … ATP khi ua rau myosin tso tawm actin, tso cai rau actin thiab myosin cais tawm ntawm ib leeg.
Puas myosin siv ATP lossis GTP?
Nucleotide Dependence of Conformations
Thaum hydrolysis ntawm ATP nrawm hauv myosin, GTP hydrolysis qeeb hauv GTPases me thiab yuav tsum muaj kev tswj hwm ntxiv (GAP) rau lawv inactivation.
ATP siv myosin ntau npaum li cas?
Kev txav ntawm myosin tshwm sim los ntawm kev sib txuas ntawm myosin lub taub hau mus rau ib qho actin filament, khoov ntawm lub taub hau, thiab nws cov detachment tom qab nyob rau hauv ib tug cyclical ATP-dependent txheej txheem (saib daim duab 18-25). Thaum txhua lub voj voog, myosin txav 5 - 25 nm thiab ib ATP yog hydrolyzed.
ATP cuam tshuam li cas myosin?
ATP npaj myosin rau kev khi nrog actin los ntawm kev txav mus rau lub zog siab dua thiab txoj haujlwm "cocked". Thaum cov myosin tsim tus choj hla nrog actin, Pi disassociates thiab cov myosin dhau lub zog stroke, mus txog lub zog qis dua thaum lub sarcomere luv.
Pob myosin taub hau khi rau ATP?
Thaum kawg ntawm lub zog stroke, myosin nyob rau hauv txoj haujlwm qis zog. … ATP ces khi rau myosin, txav cov myosin mus rau nws lub zog siab, tso lub taub hau myosinlos ntawm actin active site. ATP tuaj yeem txuas mus rau myosin, uas tso cai rau lub voj voog hla kev pib dua; ntxiv cov leeg nqaij tuaj yeem tshwm sim.
