Qhov sib txawv tseem ceeb ntawm reductase thiab oxidoreductase yog reductase yog ib qho enzyme uas catalyzes txo cov tshuaj tiv thaiv, thaum oxidoreductase yog ib qho enzyme uas catalyzes oxidation thiab txo cov tshuaj tiv thaiv.
Cov tshuaj tiv thaiv Redox suav nrog txo qis thiab oxidation. Thaum lub sij hawm redox cov tshuaj tiv thaiv, oxidation xeev ntawm cov molecules los yog atoms hloov. Enzymes catalyze cov tshuaj tiv thaiv redox. Oxidoreductase thiab reductase yog ob hom enzymes koom nrog hauv cov tshuaj tiv thaiv redox. Reductases catalyze txo cov tshuaj tiv thaiv (tau txais cov khoom siv hluav taws xob) thaum oxidoreductases catalyze ob qho tib si oxidation (tso tawm ntawm electrons) thiab txo cov tshuaj tiv thaiv (nce ntawm electrons).
YReductase yog dab tsi?
Reductase yog ib qho enzyme uas catalyzes txo cov tshuaj tiv thaiv los ntawm kev txo qis lub zog ua kom xav tau rau cov tshuaj tiv thaiv tshwm sim. Reductases yog ib pawg ntawm oxidoreductase. Kev txo qis yog qhov nce ntawm electrons, thiab nws feem ntau yog ua ke nrog oxidation. Raws li qhov tshwm sim ntawm kev txo qis, lub xeev oxidation ntawm ion txo.
Daim duab 01: Ribonucleotide Reductase
Dihydrofolate reductase, 5α-reductase, 5β-reductase, HMG-CoA reductase, methemoglobin reductase, ribonucleotide reductase, aldose reductase thiab thioredoxin reductase yog ob peb reductases. 5α-reductase catalyzes irreversible txo ntawm testosterone rau dihydrotestosterone.
Oxidoreductase yog dab tsi?
Oxidoreductase yog ib qho enzyme uas catalyzes oxidation ntawm ib molecule thiab txo ntawm lwm molecule ib txhij. Hauv lwm lo lus, oxidoreductases tuaj yeem ua rau ob qho tib si oxidation thiab txo cov tshuaj tiv thaiv (oxidoreduction tshua). Lawv ua raws li oxidase rau ib qho tshuaj tiv thaiv thiab reductase rau lwm cov tshuaj tiv thaiv. Yog li ntawd, lawv catalyze hloov ntawm electrons los ntawm ib tug molecule (oxidant) mus rau lub reductant. Lawv xav tau cov pa oxygen lossis NAD + / NADP + txhawm rau ua raws li cov khoom siv hluav taws xob. Oxidoreductases tuaj yeem yog oxidases lossis dehydrogenases. Oxidases catalyze cov tshuaj tiv thaiv thaum molecular oxygen ua raws li kev lees txais ntawm hydrogen lossis electrons. Dehydrogenases oxidize lub substrate los ntawm kev hloov hydrogen mus rau ib qho kev lees paub uas yog NAD+/NADP+ los yog flavin enzyme. Peroxidases, hydroxylases, oxygenases, thiab reductases yog lwm hom oxidoreductases.
Daim duab 02: Oxidoreductase – Glyceraldehyde- 3- phosphate
Oxidoreductases koom nrog hauv cov tshuaj aerobic thiab anaerobic ua pa. Lawv catalyze cov tshuaj tiv thaiv glycolysis, TCA voj voog, oxidative phosphorylation, thiab hauv cov amino acid metabolism. Glyceraldehydes-3-phosphate dehydrogenase yog oxidoreductase uas koom nrog glycolysis hauv kev txo qis ntawm NAD + rau NADH. Nws tuaj yeem piav qhia raws li hauv qab no.
Pi + glyceraldehyde-3-phosphate + NAD+ → NADH + H+ + 1, 3-bisphosphoglycerate
Dab tsi zoo sib xws ntawm Reductase thiab Oxidoreductase?
- Reductase thiab oxidoreductase yog ob hom enzymes uas yog cov proteins.
- Reductases yog ib pawg ntawm oxidoreductase.
- Ob lub enzymes catalyze cov tshuaj tiv thaiv uas hloov oxidation xeev ntawm ions thiab molecules.
- Lawv koom nrog ob qho tib si aerobic thiab anaerobic ua pa tawm.
Qhov txawv ntawm Reductase thiab Oxidoreductase yog dab tsi?
Reductase thiab oxidoreductase yog ob hom enzymes. Reductase catalyzes txo cov tshuaj tiv thaiv thaum oxidoreductase catalyzes ob qho tib si oxidation thiab txo cov tshuaj tiv thaiv. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm reductase thiab oxidoreductase. Dihydrofolate reductase, 5α-reductase, 5β-reductase, HMG-CoA reductase, methemoglobin reductase, ribonucleotide reductase, aldose reductase thiab thioredoxin reductase yog ob peb reductases. Lub caij no, oxidases, dehydrogenases, peroxidases, hydroxylases, oxygenases thiab reductases yog oxidoreductases.
Hauv qab infographic tabulates qhov sib txawv ntawm reductase thiab oxidoreductase.
Summary – Reductase vs Oxidoreductase
Redox cov tshuaj tiv thaiv cuam tshuam nrog kev hloov ntawm electrons ntawm cov tshuaj lom neeg. Ib lub molecule tso electrons (oxidation) thaum lwm lub molecule tau txais electrons (txo). Reductases yog cov enzymes uas catalyze txo cov tshuaj tiv thaiv. Oxidoreductases yog cov enzymes uas ua rau ob qho tib si oxidation thiab txo cov tshuaj tiv thaiv. Ob leeg reductases thiab oxidoreductases txo qis kev ua kom lub zog ntawm cov tshuaj tiv thaiv. Ntxiv mus, lawv hloov lub xeev oxidation ntawm cov molecules koom nrog cov tshuaj tiv thaiv. Yog li, qhov no qhia txog qhov sib txawv ntawm reductase thiab oxidoreductase.
