Qhov sib txawv tseem ceeb ntawm oxidases thiab oxygenases yog tias oxidases yog cov enzymes uas catalyze oxidation-txo cov tshuaj tiv thaiv los ntawm kev xa cov hydrogen los ntawm substrate rau oxygen, thiab yog li, tsim dej los yog hydrogen peroxide thaum, cov oxygenases yog cov enzymes uas catalyze ncaj qha kev koom ua ke ntawm cov pa los ntawm molecular oxygen (O2) mus rau lub substrate thaum lub sij hawm oxidation ntawm ib qho substrate.
Enzymes yog cov protein molecules uas catalyze biochemical tshwm sim tshwm sim hauv cov hlwb ntawm cov kab mob nyob. Raws li, lawv nce tus nqi ntawm cov tshuaj tiv thaiv los ntawm kev txo qhov ua kom lub zog ntawm cov tshuaj tiv thaiv. Yog li ntawd, cov tshuaj tiv thaiv tshwm sim ntawm kev kub ceev. Tsis tas li ntawd, qee cov enzymes catalyze qhov kev tawg ntawm cov molecules complex rau hauv lawv cov monomers thaum qee cov enzymes catalyze tsim biomolecules los ntawm lawv cov monomers. Ib yam li ntawd, oxidases thiab oxygenases yog ob hom enzymes uas muaj nyob rau hauv tag nrho cov kab mob nyob.
Oxidases yog dab tsi?
Oxidases yog ib hom oxido-reductases uas ua rau cov tshuaj tiv thaiv oxidation-txo. Cov enzymes koom nrog hauv oxidation-txo cov tshuaj tiv thaiv los ntawm kev hloov cov hydrogen los ntawm substrate mus rau oxygen. Tom qab ntawd cov pa oxygen ua dej (H2O) lossis hydrogen peroxide (H2O2).
Daim duab 01: Monoamine Oxidase A
Feem ntau, oxidases muaj nyob rau hauv ntau qhov chaw ntawm tib neeg lub cev, thiab lawv ua raws li catalysts hauv oxidizing ntau hom substrates. Yog li ntawd, ntau cov molecules complex xws li amines, qabzib, thiab xanthenes yog oxidized rau hauv yooj yim molecules uas yooj yim metabolized los ntawm lub cev.
Tsis tas li ntawd, muaj ntau hom oxidases, thiab lawv cov npe sib txawv raws li cov molecule uas lawv catalyze. Qee qhov piv txwv ntawm oxidases yog cytochrome oxidase, ascorbic acid oxidase, uricase thiab monoamine oxidase. Cov tshuaj tiv thaiv hauv qab no qhia txog qhov kev ua ntawm oxidase hauv cov tshuaj tiv thaiv oxidation-txo, AH + O2 + 2H+ + 2e–=AOH + H 2O
Oxygenases yog dab tsi?
Oxygenases yog ib pawg ntawm oxido-reductases. Cov enzymes no ua rau kev sib koom ua ke ntawm oxygen atoms los ntawm molecular O 2rau substrates thaum lub sij hawm oxidation ntawm lub substrate. Qee qhov kev tshwm sim suav nrog ob lub pa oxygen atom thaum qee qhov kev cuam tshuam suav nrog ib qho oxygen atom. Yog li, raws li tus naj npawb ntawm cov pa atoms sib xyaw ua ke thaum lub sij hawm cov tshuaj tiv thaiv, cov enzyme uas catalyzes cov tshuaj tiv thaiv txawv.
Daim duab 02: Oxygenase
Mono-oxygenases catalyze cov kev koom ua ke ntawm ib qho oxygen atom ua ib pawg hydroxyl rau cov substrate. Qhov thib ob oxygen atom koom nrog hauv kev tsim cov dej molecule. Qee qhov piv txwv ntawm monooxygenases yog tryptophan pyrrolase thiab carotenase. Ntawm qhov tod tes, dioxygenases catalyze kev koom ua ke ntawm ob lub atoms ntawm oxygen mus rau lub substrate. Qee qhov piv txwv ntawm dioxygenases yog phenylalanine hydroxylase thiab tyrosinase.
Cov tshuaj tiv thaiv hauv qab no qhia txog cov catalysis ntawm mono-oxygenase hauv cov tshuaj tiv thaiv oxidation-txo, AH + XH2 + O2=AOH + X+ H2O
Dab tsi yog qhov zoo sib xws ntawm Oxidases thiab Oxygenases?
- Ob oxidases thiab oxygenases yog cov proteins uas ua haujlwm li biocatalysts.
- Tsis tas li ntawd, lawv yog oxido-reductases uas ua rau cov tshuaj tiv thaiv oxidation-txo.
Qhov txawv ntawm Oxidases thiab Oxygenases yog dab tsi?
Qhov sib txawv tseem ceeb ntawm oxidases thiab oxygenases yog cov tshuaj tiv thaiv oxidation-txo uas lawv catalyze. Oxidases catalyze kev hloov ntawm hydrogen los ntawm substrate mus rau oxygen thaum oxygenases catalyze hloov cov atomic oxygen los ntawm O2 rau substrate. Tsis tas li ntawd, oxygenases yog ob hom; monooxygenases thiab dioxygenase, thaum oxidases yog ib hom. Yog li, qhov no yog lwm qhov sib txawv ntawm oxidases thiab oxygenases.
Ntxiv mus, qhov sib txawv ntxiv ntawm oxidases thiab oxygenases yog tias oxidases feem ntau pom muaj nyob rau hauv cell membranes thiab muaj lub luag haujlwm rau lub tsev ntawm ATP uas khaws cia lub zog ntawm tes thaum oxygenases yog lub luag haujlwm rau kev rhuav tshem cov hlau uas muab faib rau tag nrho. lub cev.
Cov duab hauv qab no muab cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm oxidases thiab oxygenases.
Summary – Oxidases vs Oxygenases
Oxidases thiab oxygenases yog ob hom oxido-reductases uas catalyze oxidation-txo cov tshuaj tiv thaiv. Oxidases catalyze cov hloov hydrogen los ntawm substrate mus rau oxygen thaum lub sij hawm oxidation-txo cov tshuaj tiv thaiv. Ntawm qhov tod tes, oxygenases catalyze cov kev koom ua ke ncaj qha ntawm cov pa atoms ntawm O2 mus rau lub substrate. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm oxidases thiab oxygenases.
