Kev sib cuam tshuam ntawm hydrogen-bonding ntawm cysteine, uas tuaj yeem ua haujlwm hydrogen-nyiaj pub dawb thiab / lossis tus txais, ua lub luag haujlwm tseem ceeb hauv cysteine ntau lub luag haujlwm hauv cov protein.
Yuav ua li cas cysteine daim ntawv cog lus nrog?
Thaum oxidized, cysteine residues tuaj yeem tsim disulfide bonds, ntxiv dag zog rau cov protein tertiary thiab quaternary qauv. Tsis tas li ntawd, ntau cov proteins uas muaj hlau siv cysteine los tuav lawv cov hlau nyob rau hauv qhov chaw, vim tias sulfhydryl sab saw yog cov hlau ruaj khov.
Puas yog cysteine yog ib tug hydrogen daim ntawv cog lus pub los yog txais?
10, 11 Ntawm 20 aa residues, Cys tau pom tias yog qhov tsawg tshaj plaws ntawm cov kuab tshuaj nyob hauv cov protein. 1 Nws tuaj yeem ua tus hydrogen daim ntawv cog lus (HB) tus neeg pub dawb thaum protonated nrog rau HB txaishauv ob lub xeev protonated thiab deprotonated.
Puas serine thiab cysteine tsim hydrogen bonds?
Hydrogen bonding nyob rau hauv ib lub helix muab ib txoj hauv kev rau serine, threonine thiab cysteine residues kom txaus siab rau lawv cov hydrogen-bonding peev xwm tso cai rau cov residues tshwm sim nyob rau hauv helices faus nyob rau hauv ib tug hydrophobic milieu.
Yuav ua li cas hom amino acids tsim hydrogen bonds?
Cov chemistry ntawm cov amino acid sab chains yog qhov tseem ceeb rau cov qauv protein vim tias cov saw hlau sab no tuaj yeem sib txuas nrog ib leeg kom tuav ntev ntawm cov protein nyob rau hauv qee yam duab lossis kev sib haum xeeb. Charged amino acid side chains tuaj yeem tsim cov ionic bonds, thiab polar amino acidsmuaj peev xwm tsim cov ntawv cog lus hydrogen.
