Myosin khi rau actin ntawm qhov chaw khi ntawm globular actin protein. Myosin muaj lwm qhov chaw sib khi rau ATP ntawm qhov kev ua haujlwm enzymatic hydrolyzes ATP hydrolyzes ATP ATP hydrolysis yog cov tshuaj tiv thaiv catabolic txheej txheem los ntawm cov tshuaj siv hluav taws xob uas tau khaws cia hauv lub zog phosphoanhydride bonds hauv adenosine triphosphate. (ATP) raug tso tawm los ntawm kev faib cov ntawv cog lus no, piv txwv li hauv cov leeg nqaij, los ntawm kev ua haujlwm hauv cov khoom siv hluav taws xob. https://en.wikipedia.org › wiki › ATP_hydrolysis
ATP hydrolysis - Wikipedia
rau ADP, tso tawm cov khoom tsis muaj phosphate molecule thiab lub zog. ATP khi ua rau myosin tso tawm actin, tso cai rau actin thiab myosin cais tawm ntawm ib leeg.
actin thiab myosin ua haujlwm li cas?
Actin thiab Myosin ua haujlwm li cas? Actin thiab myosin ua haujlwm ua ke los tsim cov leeg nqaij thiab, yog li ntawd, txav… Thaum tropomyosin tau tsiv tawm ntawm txoj kev, lub taub hau myosin tuaj yeem khi rau qhov chaw sib txuas ntawm cov actin filaments. Qhov no ua rau actin-myosin cross-bridges thiab tso cai rau cov leeg nqaij pib.
Lub luag haujlwm ntawm myosin hauv cov leeg nqaij yog dab tsi?
Nyob rau hauv cov ntsiab lus, myosin yog a lub cev muaj zog protein feem ntau tshwj xeeb koom nrog hauv cov leeg nqaij. … Tom qab ntawd, cov myosin taub hau khi rau actin thiab ua rau cov actin filaments swb. Thaum kawg, ATP rhuav tshem cov actin-myosin daim ntawv cog lus thiab tso cai rau lwm tus myosin 'oar stroke' tshwm sim. Kev rov ua dua ntawm cov xwm txheej no ua rau cov leeg mob sib cog lus.
Lub luag haujlwm tseem ceeb ntawm myosin yog dab tsi?
Myosins koom nrog kev loj hlob thiab cov ntaub so ntswg tsim, metabolism, kev tsim tawm, kev sib txuas lus, rov tsim dua, thiab txav ntawm tag nrho 100 trillion hlwb hauv tib neeg lub cev. Tsis tas li ntawd, myosins txhawb kev nkag mus sai ntawm cov kab mob microbial xws li kab mob cab, kab mob, thiab cov kab mob hauv eukaryotic host cells.
myosin ua li cas?
Cov myofibrils yog tsim los ntawm cov tuab thiab nyias myofilaments, uas pab muab cov nqaij leeg nws cov kab txaij. Lub thick filamentsyog tsim los ntawm myosin, thiab nyias filaments yog feem ntau actin, nrog rau ob lwm cov leeg nqaij, tropomyosin thiab troponin.
