Tus qauv ntawm sphingolipids yog dab tsi?
Tus qauv ntawm sphingolipids yog dab tsi?

Video: Tus qauv ntawm sphingolipids yog dab tsi?

Video: Tus qauv ntawm sphingolipids yog dab tsi?
Video: 21. Sphingolipids: Introduction & Classification 2024, Lub Xya hli ntuj
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Tus qauv ntawm sphingolipids . Hauv sphingolipids cov tsos mob , thaj av hydrophobic suav nrog lub hauv paus ntev sphingoid puag nrog feem ntau 18 carbons, xws li sphingosine, uas txuas nrog rau acyl pab pawg ntawm cov kua qaub ntawm cov amide bond (R2).

Ib yam li ntawd, nws tau nug, dab tsi yog sphingolipids muaj los ntawm?

Cov sphingolipids cov tsos mob , zoo li phospholipids, yog muaj li ntawm ib tug polar taub hau pab pawg neeg thiab ob nonpolar tails. Cov tub ntxhais ntawm sphingolipids cov tsos mob yog cov saw ntev amino cawv, sphingosine. Cov sphingolipids cov tsos mob suav nrog sphingomyelins thiab glycosphingolipids (cerebrosides, sulfatides, globosides thiab gangliosides).

Tsis tas li ntawd, koj yuav txheeb xyuas li cas sphingolipid? Glycosphingolipids yog ceramides nrog ib lossis ntau cov piam thaj seem sib koom hauv β-glycosidic txuas ntawm 1-hydroxyl txoj haujlwm (saib duab).

  1. Cerebrosides muaj ib cov piam thaj lossis galactose ntawm txoj haujlwm 1-hydroxy.
  2. Gangliosides muaj tsawg kawg peb lub suab thaj, ib qho yuav tsum yog sialic acid.

Hais txog qhov no, kev ua haujlwm ntawm sphingolipid yog dab tsi?

Sphingolipids yog chav kawm ntawm cov lipids nrog pab pawg lub taub hau ncov qaumteb qabteb thiab ob lub taub hau uas tsis yog lub taub hau. nyuaj sphingolipids cov tsos mob nyob hauv cov ntshav ntshav ntawm cov tsiaj tsiaj (tshwj xeeb yog cov paj hlwb) muaj cov qauv muaj nuj nqi thiab ntseeg tias tiv thaiv lub xov tooj ntawm tes los ntawm teeb meem ib puag ncig.

Puas yog sphingolipids muaj cov rog rog?

Sphingolipids muaj nyob hauv daim nyias nyias ntawm ob qho tib si cog thiab tsiaj tsiaj. Ceramides yog cov qauv txheej txheem ntawm txhua qhov sphingolipids cov tsos mob , thiab tau tsim los ntawm kev koom ua ke ntawm cov saw ntev heev cov rog nrog sphingosine. Sphingomyelins tsuas yog phospholipids nkaus xwb ua tsis muaj qab zib glycerol.

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