Qhov txawv ntawm Inducible thiab Constitutive Promoter

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Qhov txawv ntawm Inducible thiab Constitutive Promoter
Qhov txawv ntawm Inducible thiab Constitutive Promoter

Video: Qhov txawv ntawm Inducible thiab Constitutive Promoter

Video: Qhov txawv ntawm Inducible thiab Constitutive Promoter
Video: Qhov Txawv Ntawm Lus Hmoob Thiab Lus Mab Mawb 2024, Kaum ib hlis
Anonim

Qhov sib txawv tseem ceeb ntawm kev txhawb nqa tsis muaj zog thiab kev txhawb nqa yog tias tus neeg txhawb nqa tsis muaj zog yog tus tswj hwm kev txhawb nqa uas ua haujlwm tsuas yog los teb rau cov kev xav tshwj xeeb thaum tus txhawb nqa yog tus txhawb nqa uas tsis muaj kev tswj hwm uas ua haujlwm hauv txhua qhov xwm txheej.

Txoj kev txhawb nqa yog qhov tseem ceeb ntawm cov noob. Nws yog DNA ib ntus nyob ze thiab nce mus rau qhov chaw pib hloov pauv ntawm cov noob. Cov neeg txhawb nqa tuaj yeem muaj 100 txog 1000 lub hauv paus khub. Lawv tso cai rau kev khi ntawm RNA polymerase (enzyme) thiab lwm yam tsim nyog cov proteins (txoj kev hloov pauv uas nrhiav RNA polymerase) pib sau ntawv. Muaj ntau hom kev txhawb nqa. Inducible thiab constitutive txhawb nqa yog ob hom. Inducible txhawb nqa yog tswj hwm cov neeg txhawb nqa uas ua haujlwm hauv lub cell nkaus xwb hauv kev teb rau ib qho kev txhawb nqa tshwj xeeb. Ntawm qhov tod tes, cov neeg txhawb nqa tsim nyog yog cov neeg txhawb nqa uas tsis muaj kev tswj hwm uas ua haujlwm hauv txhua qhov xwm txheej hauv lub xovtooj.

Tus Txhawb Nqa Inducible yog dab tsi?

Inducible txhawb nqa yog tus tswj hwm kev txhawb nqa uas dhau los lossis ua haujlwm hauv lub xovtooj ntawm cov lus teb rau cov stimuli tshwj xeeb. Yog li ntawd, cov neeg txhawb nqa no tsuas yog ua haujlwm hauv qee qhov xwm txheej. Tshwj tsis yog nws tau txais kev txhawb nqa, tus txhawb nqa uas tsis muaj zog nyob hauv lub xeev tsis muaj zog. Nyob rau hauv lub xeev tsis muaj zog los yog tawm hauv lub xeev, cov kev hloov pauv lossis RNA polymerase tsis tuaj yeem khi nrog tus txhawb nqa. Thaum ib tug inducer khi rau cov activator protein, activator protein khi nrog tus txhawb nqa thiab ua rau nws nquag pib transcription.

Cov neeg txhawb nqa Inducible qhib rau hauv cov lus teb rau cov stimuli sib txawv xws li lub teeb, kub thiab tshuaj lom neeg, thiab lwm yam. Raws li hom kev txhawb nqa uas ua rau cov neeg txhawb nqa, muaj ntau hom kev txhawb nqa inducible xws li tshuaj lom neeg cov neeg txhawb nqa, inducible kub promoters thiab lub teeb-inducible txhawb, thiab lwm yam. Tshuaj inducible txhawb nqa yog cov feem ntau. Qee qhov kev txhawb nqa tsis muaj zog yog qhib los ntawm cawv, tetracycline, tshuaj tua kab mob, tooj liab, steroid, thiab lwm yam. Kub inducible, light-inducible, oxygen theem, txias-inducible, tshav kub-inducible thiab mechanical raug mob inducible promoters kuj hu ua lub cev inducible txhawb.

Qhov txawv ntawm Inducible thiab Constitutive Promoter
Qhov txawv ntawm Inducible thiab Constitutive Promoter

Daim duab 01: Tus Txhawb Nqa

Tus Txhawb Kev Tsim Nyog yog dab tsi?

Tus neeg txhawb nqa yog tus txhawb nqa uas tsis muaj kev tswj hwm uas ua haujlwm hauv vivo txhua qhov xwm txheej. Yog li ntawd, cov neeg txhawb nqa no ua cov kev hloov pauv ntawm cov noob caj noob ces tsis tu ncua hauv lub cell. Cov dej num ntawm cov neeg txhawb nqa no tsis cuam tshuam los ntawm cov xwm txheej hloov pauv. Txawm hais tias ib puag ncig ib puag ncig thiab kev loj hlob theem ntawm cov kab mob, cov neeg txhawb nqa tsim tso cai rau kev hloov pauv ntawm cov noob hauv txhua cov ntaub so ntswg. Lawv feem ntau ywj siab ntawm ib puag ncig thiab kev loj hlob yam. Yog li ntawd, cov neeg txhawb nqa no tau ua haujlwm thoob plaws hom thiab txawm tias thoob plaws lub nceeg vaj.

Nyob rau hauv cov nroj tsuag, cov neeg txhawb nqa tsim tau siv rau kev qhia ntawm cov transgenes. Feem ntau, ib lub xovtooj xav tau tRNA, rRNA, RNA polymerase, ribosomal proteins tsis tu ncua. Cov noob uas tsim cov khoom no muaj cov neeg txhawb nqa. Qee qhov piv txwv ntawm cov neeg txhawb nqa muaj xws li cog ubiquitin txhawb nqa, nplej actin 1 txhawb nqa, pob kws cawv dehydrogenase txhawb nqa, thiab lwm yam. Opine txhawb nqa thiab CaMV 35S txhawb nqa yog ob qho piv txwv ntxiv ntawm cov neeg txhawb nqa.

Dab tsi yog qhov zoo sib xws ntawm Inducible thiab Constitutive Promoter?

  • Txoj kev tsis ncaj ncees thiab kev txhawb nqa yog ob ntawm plaub hom kev txhawb nqa.
  • Lawv yog cov kab ke DNA nyob ze ntawm qhov chaw pib hloov pauv ntawm cov noob.
  • Lawv pab txhawb kev khi ntawm RNA polymerase thiab cov khoom siv hloov pauv.

Qhov txawv ntawm Inducible thiab Constitutive Promoter yog dab tsi?

Inducible txhawb nqa yog tus tswj hwm kev txhawb nqa uas tso cai rau kev hloov pauv ntawm nws cov noob caj ces tsuas yog qee qhov xwm txheej hauv lub cell. Constitutive promoter yog ib qho kev txhawb nqa uas tsis muaj kev tswj hwm uas tso cai rau kev hloov pauv txuas ntxiv ntawm nws cov noob caj noob ces. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm inducible thiab kev txhawb nqa. Ntxiv mus, lwm qhov sib txawv ntawm inducible thiab constitutive promotive yog hais tias cov inducible promoters raug cuam tshuam los ntawm abiotic thiab biotic yam, thaum lub constitutive promoters muaj ntau ywj siab ntawm ib puag ncig thiab kev loj hlob yam.

Cov ntaub ntawv hauv qab no-daim duab qhia txog qhov sib txawv ntawm inducible thiab constitutive promoter nyob rau hauv daim ntawv tabular.

Qhov sib txawv ntawm Inducible thiab Constitutive Promoter hauv Tabular Form
Qhov sib txawv ntawm Inducible thiab Constitutive Promoter hauv Tabular Form

Summary – Inducible vs Constitutive Promoter

Cov neeg txhawb nqa tsis txaus ntseeg thiab cov neeg txhawb nqa yog ob hom kev txhawb nqa. Inducible cov neeg txhawb nqa tso cai rau kev hloov pauv ntawm lawv cov noob tsuas yog ntawm qee qhov xwm txheej hauv kev teb rau cov kev xav tshwj xeeb. Lawv yog cov tswj kev txhawb nqa. Ntawm qhov tod tes, cov neeg txhawb nqa tsim tau tso cai txuas ntxiv ntawm lawv cov noob caj noob ces. Lawv yog cov neeg txhawb nqa uas tsis muaj cai. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm inducible thiab constitutive txhawb nqa. Cov neeg txhawb nqa muaj kev ywj pheej ntawm ib puag ncig thiab kev loj hlob yam tseem ceeb thaum cov neeg txhawb nqa tsis tuaj yeem cuam tshuam los ntawm biotic thiab abiotic yam.

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