Yuav ua li cas lub cev muaj zog proteins taug kev?
Yuav ua li cas lub cev muaj zog proteins taug kev?

Video: Yuav ua li cas lub cev muaj zog proteins taug kev?

Video: Yuav ua li cas lub cev muaj zog proteins taug kev?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
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Microtubule lub cev muaj zog proteins hloov lub zog ntawm ATP hydrolysis rau hauv kev ua haujlwm ntawm microtubules. Muaj ob chav loj ntawm microtubule lub cev muaj zog proteins , kinesins thiab dyneins. Kinesins feem ntau taug kev mus rau qhov kawg ntawm microtubules, whereas dyneins taug kev mus rau qhov kawg minus.

Nyob rau hauv txoj kev no, lub luag hauj lwm ntawm lub cev muaj zog proteins yog dab tsi?

Lub cev muaj zog proteins yog molecular lub cev muaj zog uas siv ATP hydrolysis txav raws cytoskeletal filaments nyob rau hauv lub cell. Lawv ua tiav ntau muaj nuj nqi nyob rau hauv cov kab mob lom, nrog rau kev tswj cov zawv zawg ntawm filaments nyob rau hauv cov leeg nqaij contraction thiab mediating intracellular thauj raws biopolymer filament lem.

Tsis tas li ntawd, nyob qhov twg cov motors proteins pom? Lub cev muaj zog proteins yog pom nyob rau hauv yuav luag tag nrho cov hlwb eukaryotic, thiab lawv hloov tshuaj zog siv ATP hydrolysis rau hauv txhua yam ua hauj lwm uas powers lawv txav raws cytoskeletal lem. Peb chav kawm ntawm lub cev muaj zog protein superfamily tau ua yam ntxwv: myosin, kinesin, thiab dynein.

Ib sab saum toj no, lub cev muaj zog proteins txav ceev npaum li cas?

Kinesin hydrolyzes ATP ntawm tus nqi kwv yees li 80 molecules ib ob. Yog li, muab cov kauj ruam loj ntawm 80 Å ib molecule ntawm ATP, kinesin txav nrog microtubule ntawm a ceev ntawm 6400 Å ib ob. Tus nqi no yog qhov qeeb qeeb dua li qhov siab tshaj plaws rau myosin, uas txav txheeb ze rau actin ntawm 80,000 Å ib ob.

Yuav ua li cas thaum lub cev muaj zog proteins puas lawm?

Thaum twg lub cev muaj zog proteins puas lawm los yog ploj lawm yuav tsis muaj zog. Lub cev muaj zog proteins ua kom muaj zog hauv cov hlwb thiab cov ntaub so ntswg. Lub cev muaj zog proteins Siv lub zog ntawm ATP, hydrolysis kom txav cov khoom thauj xws li chromosomes thiab vesicles raws cytoskeleton's microtubule networks.

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