Video: Cov kab mob lysozyme ua haujlwm zoo tshaj plaws li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv gram-positive kab mob , no peptidoglycan txheej yog nyob rau sab nraud ntawm lub cell. Txawm li cas los, nyob rau hauv ib tug gram-negative kab mob , peptidoglycan txheej ntawm phab ntsa ntawm tes yog nyob rau sab hauv ntxiv. Vim li no, lysozyme tuaj yeem ua kom puas gram-zoo kab mob tshaj gram-negative kab mob.
Ntawm no, lysozyme ua li cas rau cov kab mob?
Lysozyme tiv thaiv peb ntawm kev puas tsuaj puas tau kab mob kab mob. Nws yog ib qho enzyme me uas tawm tsam cov phab ntsa tiv thaiv ntawm tes kab mob . Kab mob tsim cov tawv nqaij tawv ntawm carbohydrate chains, interlocked los ntawm luv peptide strands, uas braces lawv ilv daim nyias nyias tiv thaiv lub cell lub siab osmotic siab.
Tsis tas li ntawd, dab tsi substrate ua lysozyme ua rau? Lub ntuj substrate ntawm lysozyme yog cov txheej txheem ntawm cov phab ntsa ntawm cov kab mob, cov murein (peptidoglycan), uas yog ib tug loj heev polymer ntawm (GlcNAc-MurNAc)n polysaccharide strands crosslinked los ntawm luv peptide txuas hniav ntawm cov lactyl pawg ntawm muramic acid residues.
Khaws qhov no hauv kev xav, puas yog lysozyme tua cov kab mob?
Lysozyme ua haujlwm los ntawm kev rhuav tshem cov phab ntsa tiv thaiv ntawm tes kab mob . Lysozyme yog zoo dua tiv thaiv gram-positive kab mob tshaj gram-negative kab mob vim gram-positive kab mob muaj ntau peptidoglycans nyob rau hauv lawv lub cell phab ntsa. Txawm hais tias qhov kev txwv no txwv, lysozyme yog ib feem tseem ceeb ntawm kev tiv thaiv kab mob.
Dab tsi ntawm cov kab mob cell raug tawm tsam los ntawm lysozyme?
Lysozymes lub vev xaib nquag khi cov peptidoglycan molecule hauv qhov tseem ceeb cleft ntawm nws ob lub npe. Nws kev tawm tsam peptidoglycans (pom nyob rau hauv cell phab ntsa ntawm kab mob , tshwj xeeb tshaj yog Gram-positive kab mob ), nws lub ntuj substrate, nruab nrab ntawm N-acetylmuramic acid (NAM) thiab plaub carbon atom ntawm N-acetylglucosamine (NAG).
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