Prolin

Prolin
Generelt
Systematisk navn (S)-Pyrrolidin-
2-carboxylsyre
Molekylformel C5H9NO2
Molmasse 115,13 g/mol
CAS nummer [147-85-3]
SMILES C1CCNC1C(=O)O
Egenskaber
Smeltepunkt 221 °C
Syrestyrkekonstant (pKa) 1,95
Basestyrkekonstant (pKb) 10,47
Isoelektrisk punkt (pI) 6,30
Hvis ikke andet er angivet, er data givet for
stoffer i standardtilstanden (ved 25 °C, 100 kPa)

Prolin (også Pro eller P) er en α-aminosyre, der benyttes i biosyntesen af proteiner. Prolin er en cyklisk aminosyre, dens sidekæde er en 4-C-kæde som er kovalent bundet til aminogruppen. Prolin er derfor en sekundær amin, i modsætning til de andre aminosyrer som alle er primære aminer. Når prolin sidder i en peptidkæde har dens rest ingen amidproton, hvilket betyder at den ikke kan danne hydrogenbindinger.

Prolin syntetiseres fra glutaminsyre ved hjælp af de to enzymer gamma-glutamylkinase og pyrrolidin-5-carboxylatreduktase.

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